2. RESEARCH DOCUMENTATION OF THE GROUP - … · 2. RESEARCH DOCUMENTATION OF THE GROUP ......

2. RESEARCH DOCUMENTATION OF THE GROUP SYSTEMS, DYNAMICS AND CONTROL1

1. University/Department. Eindhoven University of Technology Department of Mechanical Engineering

2. Subprogrammes related to research school EM. 2.1 Non-linear Dynamics of Mechanical Systems 2.2 Structural Acoustics 2.3 Structural Optimization 2.4 Automotive Technology 2.5 Injury Biomechanics 2.6 Systems Optimization and Control

3. Group directors.

Prof.Dr. H. Nijmeijer Prof.Dr.Ir. J.E. Rooda Prof.Dr.Ir. M. Steinbuch

4. Senior academic staff: name, position, research input in fte related to research school EM. Besselink, Dr.Ir. J.J.M. UD since Nov. 2002 (0.4) main position

at TNO-TPD 0.1

Campen, Prof.Dr.Ir. D.H. van Full Professor (PM) main position Dean TU/e-W

p.m.

Druten, Dr.Ir. R.M. v. UD (0.8) 0.2 Etman, Dr.Ir. L.F.P. UD 0.4 Fey, Dr.Ir. R.H.B. UD since Feb. 2002 0.2 Kok, Prof.Dr.Ir. J.J. Full Professor (0.4) 0.1 Kraker, Dr.Ir. A. de

Part-time UHD (0.3) main position Dir. Education Mech. Eng. program. W

p.m.

Lefeber, Dr.Ir. E. UD 0.4 Nijmeijer, Prof.Dr. H. Full Professor 0.2 Rijpkema, Dr. J.J.M. UD, General Manager Research School

EM 0.2

Rooda, Prof.Dr.Ir. J.E. Full Professor 0.2 Schoofs, Dr.Ir. A.J.G. Part-time UD (0.2) 0.1 Steinbuch, Prof.Dr.Ir. M. Full Professor 0.1 Veenhuizen, Dr. P.A. UD since Feb. 2002 0.2 Veldpaus, Dr.Ir. F.E. UHD 0.2

1 Per 2002 the activities of the previous EM groups “TU/e – Dynamics and Control Technology” and “TU/e – Systems Engineering” are combined within the new EM group “TU/e – Systems, Dynamics and Control”.

Annual Report Engineering Mechanics 2002 2.1

Verheij, Prof.Dr.Ir. J.W. Part-time Prof. (0.2) main position at

TNO-TPD 0.1

Wouw, Dr.Ir. N. van de UD 0.2 Total fte 2.9

5. PhD-projects related to research school EM per December 2002: name, source of financing, project title and research theme EM.

5.1 Nonlinear Dynamics of Mechanical Systems

Mihajlovic, M.Sc. N. (PhD 1) Limit cycling in mechanical systems StDy Pavlov, M.Sc. A.V. (PhD 2) Robust regulation of complex dynamical

systems StDy

5.2 Structural Acoustics

Debiesme, M.Sc. F.X. (PhD 3) Design tools for low noise products with uncertain parameters

StDy

Dijkhof, Ir. W.J. (PhD 3) Analysis methods for low noise products with uncertain parameters

StDy

5.3 Structural Optimization

Rooij, Ir. R.A. v. (PhD 2) Sequential approximate design optimisation including uncertainties, discontinuities and discrete design variables

StMe

5.4 Automotive Technology

Bonsen, Ir. B. (PhD 3) Modelling and control of slip in a push-belt StDy Hesseling, Ir. R.J. (PhD1/3) Passive Car Safety StDy Meerakker, Ir. K.G.O. vd (PhD 3) Alternative variator actuation StDy

5.5 Injury Biomechanics

Bosch, Ir. H.L.A. v.d. (PhD 2) Modelling of helmet/head system under impact

StMe

Dubbeldam, Ir. R. (PhD 1) (0.2) Mathematical lower extremity model for counter measure evaluation

StMe

5.6 Systems Optimization and Control

Jacobs, Ir. J.H. (PhD 2) ADOPT: Simulation based optimization of manufacturing systems

StDy

6. Postdocs: name, country, project title, subprogramme, research theme EM and period of stay.

Leine, Dr.Ir. R.I., NL KNAW fellow 2.1 StDy Lopez, Dr.Ir. I., NL Dynamics and acoustics; since sept. 2002 2.2 StDy Serrarens, Dr.Ir. A.F.A., NL Automotive control systems; jan-nov. 2002 2.4 StDy

2.2 Annual Report Engineering Mechanics 2002

7. Short description of subprogrammes related to research school EM.

In the following an overview is given of results and future developments for each of the five major research areas mentioned earlier.

7.1 Non-linear Dynamics of Mechanical Systems Within this theme, the following more specific research topics are investigated: a) Numerical and experimental study of non-smooth mechanical systems, like systems with friction, impacts, or constraints, is a mainstream topic within the group. The research on these phenomena is highly relevant in many engineering applications (friction in high performance/high precision systems, drill-strings, hybrid control systems etc.). Numerical aspects are notably difficult, but with the increasing computer power, become more and more feasible. Interesting and important results involve the study of bifurcations in non-smooth systems. This research is partially done under the support of a Royal Dutch Academy fellow. A further development along the line of non-smooth systems consists of the study of controlling non-smooth mechanical systems. This is part of a EU sponsored project. b) Development of accessible (numerical) procedures for the steady-state response under periodic excitation. In particular, a non-linear dynamics toolbox with time-discretization and shooting methods and a path-following procedure has been integrated in the commercial finite element package DIANA and in the general-purpose package MATLAB. Non-linear dynamics phenomena for multi-degree of freedom (mdof) structural engineering systems have also been studied by experiments on a laboratory scale. Applications to industrial systems (aircraft landing gear, solar array system, rotor-bearing systems, etc.) have been successfully carried out. A fairly new topic is the development of an efficient strategy in the case of stochastic excitation. Even for moderate non-linear mdof dynamic systems, stochastic linearization fails and only the very time-consuming Monte-Carlo simulation seems to remain. For an elementary laboratory system, the similarity has been evaluated both numerically and experimentally between the broad-band stochastic and the periodic response. This similarity can be used as a key to evaluate equivalent linear or equivalent non-linear models of such strongly non-linear systems. Such models will be of major importance for application in engineering practice. Still a lot of fundamental and application-oriented research has to be performed. c) Additionally, increased attention is paid to parameter identification methods for specific subsystems, e.g. roller-bearings as used in gear boxes. This information is very important for the prediction of noise radiation by such subsystems. In the future, the research in the above three topics is expected to tend to integrate, including the development of optimization strategies. Related to research themes “Structural Dynamics and Control” and “Computational Mechanics”.

7.2 Structural Acoustics The research topic involving two PhD students is the modelling of and optimization of ‘uncertainty’ in structural vibrations and the associated sound radiation. Important examples for low-noise design are road vehicles, railway carriages, aircraft, ships and MRI-scanners. (In an earlier STW-project low-noise design of Magnetic Resonance Imaging systems has been studied.) With respect to structural-acoustic modelling, these examples have two characteristic problems in common. These are the enormous size of numerical models needed to describe their physics correctly and their ‘uncertainty’ behaviour. The first topic refers to the frequency range in which structural wavelengths are small compared to the characteristic geometrical dimensions. The latter characteristic means that nominally identical structures show a large and rather


unpredictable scatter in acoustic behaviour. This is true for new products and may even increase after some years of use. Therefore, much interest is shown in improving predictive capabilities and in optimization for ‘robust designs’, i.e. designs which do not deteriorate easily during their life cycle. TNO-Institute of Applied Physics participates significantly in this long-term research and industrial partners will be sought as well. Related to research themes “Structural Dynamics and Control” and “Structural Mechanics”.

7.3 Structural Optimization The research in this area concerns the development of tools for the optimization of the dynamic behaviour of constructions, where the engineering optimization problem is considered as an interrelated combination of an Optimal Design Problem (ODP) and an Optimal Control Problem (OCP). Particular attention is paid to the development and utilization of both approximation concepts in the optimization process and of strategies for the combination, integration and coordination of effective approaches for (uncertain) ODP and OCP. In co-operation with the Systems Engineering section and the Structural Optimization and Computational Mechanics group from TUD an inter-university research project ‘ADOPT: Sequential Approximate Design Optimization including uncertainties, discontinuities and discrete design variables’ has been started. It was awarded by the Technology Foundation STW. The aim of the project is to develop design optimization tools for problems exhibiting simultaneously discrete design variables, uncertainties, and discontinuous response functions. Applications are foreseen in the design of multibody systems, composite structures and manufacturing systems. In particular, the Automatic Balancing Unit (ABU) donated by Philips CFT is used as an experimental carries in this project. Related to research themes “Structural Dynamics and Control” and “Structural Mechanics”.

7.4 Automotive Technology a) Impulse Drive Technology The aim of the NWO research project “Saving fuel without compromise for passenger cars with CVT" named Impulse Drive is to develop a new drive train concept, able to achieve a reduction of fuel consumption of passenger cars by 50 to 75% on a representative driving cycle, and a proportional reduction of CO2-emissions. As a reference, a vehicle with a conventional CVT drive train with equal acceleration performance is taken. Using a conventional internal combustion engine the fuel saving will be achieved by applying fuel saving principles such as intermittent engine operation, e-line tracking and brake energy recovery. To apply the above fuel saving principles, an additional motor-generator-accumulator unit is necessary in combination with an advanced control system. The research trajectory during the first year focused on a fuel efficiency study of the effectiveness of the fuel saving principles in relation to the efficiency of the secondary power unit. It appears that intermittent engine operation contributes to the fuel saving only slightly when electro-chemical energy storage is used in the secondary power path. The only way to achieve the goal of the project is to use the highly efficient mechanical to mechanical energy conversion of a dry hybrid belt variator connected to a flywheel system. To find a drive train configuration that is able to exchange the kinetic energy between flywheel, vehicle and engine, tools are developed in which power split concepts can be judged on their functionality and working principles can be visualized. Next to the mechanical configuration, energy management structures and strategies are studied and new ones are conceived. For the coming year various flywheel-hybrid drive train concepts will be compared on aspects like fuel consumption, emissions, drivability and costs with the help of simulations.


b) Energy efficient Continuously Variable Transmissions A new project (3 PhDs) has been granted (BTS/VDT) with emphasis on alternative actuation principles for CVT’s and slip detection algorithms for force control, in order to improve efficiency of CVTs. A first design is made and a (dynamic) analysis is done.

c) Passive Car Safety Systems Passive car safety systems are for instance air-bags and safety belts. The project is a co-operation with BMW, and is focused on the possible use of active control (feedback/feed forward) elements in passive safety systems. Identification has been used to extract linear models from the complex models. These linear models have been successfully used to design feedback controllers for the airbag and belt, showing a significant improvement of the performance (less peak decelerations of the body) of those systems. d) A start has been made on tyre modeling and vehicle dynamics. Related to research theme “Structural Dynamics and Control”.

7.5 Injury Biomechanics The aim of the injury biomechanics research is to provide or improve insight into the mechanisms through which a transient load (contact force or acceleration) on the human body results in injury, and, eventually, to use this insight to set up guidelines for protection measures and to improve injury diagnosis and treatment. The injury mechanics research is carried out in close co-operation with TNO Crash Safety Centre. One PhD project in this context deals with the research on lower body (knee, ankle, etc.) injuries through transient loads. In a PhD project, sponsored by STW, the protective functioning of helmets is investigated, and new guidelines are developed for design and testing of helmets. Here, the numerical head model is extended with a helmet model. Also, a novel physical head model is developed, containing a brain simulant, made of a silicone gel, in a flexible skull. The behaviour of this head model is assessed in a testing facility. Biplane X-ray is used to measure deformation of the artificial brain and skull. The activities in this area are done in collaboration with the CEM division. Related to research themes “Structural Dynamics and Control” and Structural Mechanics”.

7.6 Systems Optimization and Control a) Systems Design Optimization In this subprogramme optimization methods are investigated that enable to systematically design and improve complex industrial systems. Numerical design optimization tools are developed that can deal with typical governing characteristics including computationally expensive computer simulations, a mix of continuous and discrete design variables, stochastic design variables and responses, dynamic behavior, and decomposed optimal system design. Within this context the development and utilization of approximation concepts (metamodels) plays a central role. The research addresses the optimization of production systems such as multi-product flow lines, batch plants, and advanced production machines, with main focus on manufacturing systems from semiconductor industry. The inclusion of process time variability in metamodels for optimization of manufacturing systems, as well as the coordination of decomposed optimal system design problems has our special interest. Related to research themes "Structural Mechanics" and "Structural Dynamics and Control". b) Control of Manufacturing Systems In this subprogramme two main streams can be considered.


The first stream considers a class of manufacturing systems that can be approximately modeled by means of a continuous time fluid or flow model. For this approximate model, standard techniques from control theory can often be used to design controllers. However, as the manufacturing system has a discrete-event nature, a connection between the discrete event plant and the continuous time controller has to be developed. Continuous time signals have to be converted to discrete-events and measurements of discrete states need to be filtered for a better control performance. The second stream tries to bridge the gap between flow models that often ignore variability and queuing theory that often considers only steady state behavior. For that purpose new (mathematical) models need to be developed that include both variability and dynamics. It is clear that preferably these models should be suited for applying standard control theory in order to control these systems. Related to research theme “Structural Dynamics and Control”

8. Refereed scientific publications related to research school EM.

8.1 Refereed journals

Cruz, C.; H. Nijmeijer, A. Aguilar: Synchronization of a noisy chua circuit via two switching klaman filters; Journal of the Mexican Society of Instrumentation, 5 (3), 162-169, 2002. Etman, L.F.P.; R.C.N. Vermeulen; J.G.A.M. Van Heck; A.J.G. Schoofs; D.H. Van Campen: Design of a stroke dependent damper for the front axle suspension of a truck using multibody system dynamics and numerical optimization; Vehicle System Dynamics, Vol. 38, pp. 85-101, 2002. Geerts-Ossevoort, L.; P.H.M. Bovendeerd; F.W. Prinzen; T. Arts; K. Nicolay: Myofiber Orientation in the Normal and Infarcted Heart, Assessed with MR-Diffusion Tensor Imaging; Am. J. Physiol., 283, H126-H138, (in co-operation with the group “Materials Technology” (TU/e)), 2002. Jakubiak, J.; E. Lefeber; K. Tchon; H. Nijmeijer: Two-observer-based tracking algorithms for a unicycle mobile robot; International Journal of Applied Mathematics and Computer Science, Vol. 12, pp. 513-522, 2002. Leine, R.I.; D.H. van Campen: Discontinuous fold bifurcations in mechanical systems; Arch. Appl. Mech., 72, 138-146, 2002. Leine, R.I.; D.H. van Campen; W.J.G. Keultjes: Stick-slip whirl interaction in drillstring dynamics, J. Vibrations and Acoustics, 124 (2), 209-220, 2002. Leine, R.I.; B. Brogliato; H. Nijmeijer: Periodic motion and bifurcations induced by the Painlevé paradox; Eur. J. Mech. A/Solids, 21 (5), 869-896, 2002. Leine, R.I.; D.H. van Campen: Discontinuous Bifurcations of Periodic Solutions; Mathematical and Computer Modelling, 36 (3), 259-273, 2002. Mazenc, F.; K.Y. Pettersen; H. Nijmeijer: Global uniform stabilization of an underactuated surface vessel; IEEE Trans. on Aut. Control, 47 (10), 1759-1762, 2002. Pogromsky, A.; G. Santoboni; H. Nijmeijer: Partial synchronization: from symmetry towards stability; Physica D, 172 , 65-87, 2002. Rijpkema, J.J.M.; L.F.P. Etman; A.J.G. Schoofs: Use of design sensitivity information in reponse surface and kriging metamodels; Optimization and Engineering, Vol. 2, pp. 469-484. 2001, published in 2002. Wouw, N. van de; H. Nijmeijer; D.H. van Campen: A Volterra series approach to the approximation of stochastic nonlinear dynamics; Nonlinear Dynamics, 27 (4), 397-409, 2002.

8.2 Books, chapters in book -----

8.3 Refereed proceedings


Aneke, N.P.I.; D.A. Lizarraga; H. Nijmeijer: Homogeneous Stabilization of the Extended Chained Form System; in Proceedings of the IFAC World Congress; Editors: E.F. Camacho, L. Basanez, J.A. de la Puente, Barcelona, Spain, T-Tu-A08 (cd-rom), 2002. Aneke, N.P.I.; D.A. Lizarraga; H. Nijmeijer; A.G. de Jager: Homogeneous Stabilization of an Underactuated Planar PPR Manipulator; in Proceedings of the Mechatronics 2002 Conference; Editors: Job van Amerongen, Ben Jonker, Paul Regtien, Stefano Stramigioli, Enschede, Netherlands, 848-857 (cd-rom), 2002. Do, K.D.; Z.P. Jiang; J. Pan; H. Nijmeijer: Global output feedback universal controller for stabilization and tracking of underactuated ODIN-an underwater vehicle; in 41 st IEEE Conference on Decision and Control; Editors: IEEE, Las Vegas, Nevada, United States, 504-510, 2002. Etman, L.F.P.; A.T. Hofkamp; J.E. Rooda; M. Kokkolaras; P.Y. Papalambros: Coordination specification for distributed optimal system design using the Chi language; In: Proc. 9th AIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization, Atlanta, GA, September 4-6, 2002, Ed. By Mistree et al., paper AIAA-2002-5410. Etman, L.F.P.; M. Kokkolaras; P.Y. Papalambros; A.T. Hofkamp; J.E. Rooda: Coordination specification of the analytical target cascading process using the Chi language; In: Proc. 9th AIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization, Atlanta, GA, September 4-6, 2002, Ed. By Mistree et al., paper AIAA-2002-5637. Fey, R.H.B.; F.P.H. van Liempt: Sine Sweep and Steady-State Response of Simplified Solar Array Models with Nonlinear Elements; in International Conference on Structural Dynamics Modelling; Test, Analysis, Correlation and Validation; Editors: Maia, N.M.M., Montalvao e Silva, J.M., Relogio Ribeiro, A.M., Funchal, Madeira, Portugal, 201-210, 2002. Hesseling, R.J.; F.E. Veldpaus; M. Steinbuch; T. Klisch; R.J. Hesseling; F.E. Veldpaus; M. Steinbuch; T. Klisch: Control Design of a Safety Restraint System; in Proceedings of the 4th Asian Control Conference; Editors: J.H.Kim, Singapore, Singapore, 244-249, 2002. Jacobs, J.H.; L.F.P. Etman; F. Van Keulen; J.E. Rooda: An object-oriented framework for sequential approximate optimization; In: Proc. 9th AIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization, Atlanta, GA, September 4-6, 2002, Ed. Mistree et al., paper AIAA-2002-5635. (In co-operation with the group "Structural Optimization and Computational Mechanics (TUD)".) Leenheer, P. de; H. Nijmeijer; A.G. de Jager: Stabilization with hybrid control laws; in Preprints 15th IFAC World Congress; Editors: E.F. Camacho, L. Basanez, J.A. de la Puente, Barcelona, Spain, T-Tu-A08 (cd-rom), 2002. Leine, R.I.; B. Brogliato; H. Nijmeijer: Periodic Motion and Bifurcations Induced by the Painlevé Paradox; in Internation Conference on Nonsmooth/Nonconvex Mechanics with Applications in Engineering; Editors: C.C. Baniotopoulos, Thessaloniki, Greece, 291-298, 2002. Lizarraga, D.A.; H. Nijmeijer: Control of Underactuated Systems. Partial Results and Open Problems in the Characterization of the Extended Chained Form; in IDC 2002; Editors: IEEE, Adelaide, Australia, 13-18, 2002. Lizarraga, D.A.; N.P.I. Aneke; H. Nijmeijer:Robust Exponential Stabilization for the Extended Chained Form via Hybrid Control; in 41st IEEE Conference on Decision and Control; Editors: IEEE, Las Vegas, Nevada, United States, 2798-2804, 2002. Lootsma, T.F.; R. Izadi-Zamanabadi; H. Nijmeijer: A Geometric Approach to Diagnosis Applied to a ship Propulsion Problem; in 15th IFAC World Congress; E.F. Camacho, L. Basanez, J.A. de la Puente, Barcelona, Spain, T-Tu-A08 (cd-rom), 2002. Mazenc, F.; K.Y. Pettersen; H. Nijmeijer: Global Uniform Asymptotic Stabilization of an Underactuated Surface Vessel; in 41st IEEE Conference on Decision and Control ; Editors: IEEE, Las Vegas, Nevada, United States, 510-516, 2002. Pavlov, A.; A.T. Zaremba: Real-Time Identification of an Induction Motor using Sinusoidal PWM Voltage Signals; in American Control Conference; Editors: IEEE, Anchorage, AK, United States, 3082-3087, 2002.


Pavlov, A.; N. van de Wouw; H. Nijmeijer: Convergent systems and the output regulation problem; in 41st IEEE Conference on Decision and Control; Editors: IEEE, Las Vegas, Nevada, United States, 2681-2686, 2002. Rodriguez-Angeles, A.; H. Nijmeijer; H.A. van Essen: Coordination of Robot Manipulators; in Mechatronics 2002; Editors: Job van Amerongen, Ben Jonker, Paul Regtien, Stefano Stramigioli, Enschede, Netherlands, 1484-1493, (cd-rom), 2002.

9. Dissertations: related to research school EM: name, title, university, date and advisors.

Name: Brands, D.W.A. Title: Predicting brain mechanics during closed head impact – numerical and constitutive aspects Eindhoven University of Technology, March 2002. Advisors: Prof.Dr.Ir. D.H. van Campen and Prof.Dr.Ir. J.S.H.M. Wismans Co-advisor: Dr.Ir. P.H.M. Bovendeerd Current position: Post-doc, Materials Technology, Eindhoven Name: Geerts-Ossevoort, L. Title: Cardiac myofiber reorientation: A mechanism for adaptation? Eindhoven University of Technology, June 2002. Advisors: Prof.Dr.Ir. M.G.J. Arts and Prof.Dr.Ir. D.H. v. Campen Co-advisor: Dr.Ir. P.H.M. Bovendeerd Current position: MR Application Specialist with Philips Medical Systems

10. Membership editorial boards international journals.

Prof.Dr.Ir. D.H. van Campen: • Contributing Editor Multibody Systems Dynamics • Member Advisory Board Nonlinear Dynamics Prof.Dr. H. Nijmeijer: • Editor in Chief Journal of Applied Mathematics • Associate editor AUTOMATICA • Corresponding editor SIAM J Control Optimization • Subject editor International J. of Robust and Nonlinear Control • Member Editorial Board J. of Applied Mathematics Computer Science • Member Editorial Board J. of Dynamical Control Systems • Member Editorial Board International J. of Control • Member Editorial Board J. of Stability and Control • Member Editorial Board European Journal of Control • Guest editor International Journal of Control, Special issue Vol. 75, N. 16 and 17,

November 2002 Prof.Dr.Ir. J.E. Rooda: • Member Editorial Board Advanced Manufacturing Technology Prof.Dr.Ir. M. Steinbuch: • Editor-at-Large European Journal of Control • Associate editor IEEE Control Systems Magazine Prof.Dr.Ir. J.W. Verheij:


• Member Editorial Board Int. Journal of Acoustics and Vibration • Member Editorial Board of E-mail Noise and Vibration Digest • Member Editorial Board Handbook of Noise and Vibration Control (to be published

by John Wiley & Sons, New York)

11. Keynote lectures and seminars

Prof.Dr.Ir. D.H. van Campen: • Some aspects of nonlinear dynamics of non-smooth mechanical systems; Seminar,

Institute of Mechanics, Chinese Academy of Sciences, Beijing (China), 2 August 2002 (invited by Prof. Y.-L. Bai).

• Some aspects of nonlinear dynamics of non-smooth mechanical systems; Fourth International Conference on Nonlinear Mechanics, Shanghai (China), 13-16 August 2002 (general lecture).

• Some aspects of nonlinear dynamics of mechanical systems with discontinuities; Symposium Faszination Mechanik – Theoretische Grundlagen und technische Anwendungen; Stuttgart (Germany), 30 September 2002.

Dr.Ir. R.I. Leine: • Lecture “Periodic motion and bifurcations induced by the Painlevé paradox” Institut

für Mechanische Systems, ETH Zürich, June 2002. Prof.Dr.H.Nijmeijer • Control of underactuated systems: partial results and open problems. Information,

Dynamics and Control Conference, Adelaide Australia, 10-12 February, 2002. • 5 Lectures on: tracking control of under actuated mechanical systems, a control view

on synchronization of complex systems: a survey and recent advances, bifurcation in non smooth systems. CISM conference on ‘Advanced Dynamics and Control of Structures and Machines’ Udine, 15-19 April 2002.

• Control of nonlinear mechanicsl systems, Aalborg, May 2002.

12. Membership international scientific committees. Prof.Dr.Ir. D.H. van Campen: • Secretary-General of the International Union on Theoretical and Applied Mechanics

(IUTAM) since November 2000. • Chairman Board Netherlands Research School on Engineering Mechanics. • Member EUROMECH Nonlinear Oscillation Conference Committee since 2000. • Member International Advisory Committee EUROSIME 2002 (Third International

Conference on Benefiting from Thermal and Mechanical Simulation in (Micro-)Electronics, Paris (France), 15-17 April 2002.

• Vice-Chairman International Steering Committee Fourth International Conference on Nonlinear Mechanics, Shanghai, China, 13-16 August 2002.

• Executive Co-Chairman Fifth International Conference on Vibration Engineering, Nanjing, China, 18-20 September 2002.

• Chairman Fifth EUROMECH Nonlinear Oscillations Conference, The Netherlands, August 2005.

Prof.Dr. H. Nijmeijer: • Member Board Dutch Institute of Systems and Control (DISC) • Governor IEEE Control Systems Society (appointed 2001, elected 2002-2004)


• Member EU Marie Curie Network ‘Control Training Site’ • Member EU Marie Curie Network ‘MASTER’ Prof.Dr.Ir. M. Steinbuch: • Chairman of the Danish Research Programme WAVES (2001-2004). • Chairman of the Scientific Committee AVEC 04 • Member Board of the European Association of Control Dr.ir. F.E. Veldpaus: • Member of the Scientific Committee CVT 2002 • Member of the Scientific Committee AVEC 02 • Member of the Scientific Committee AVEC 04 Prof.Dr.Ir. J.W. Verheij: • President of The Acoustic Society of the Netherlands. • Secetary of the International Institute of Acoustics and Vibration

13. Awards and patents.

Awards: Druten, R. van; A. Serrarens; B. Vroemen: ASML Award for the best application oriented PhD thesis of 2002, April 2002. Verbakel, M.: “Spijkerprijs” Award for the best M.Sc. thesis in the Netherlands, within the area of Automotive Engineering. Verheij, Prof.Dr.Ir. J.W.: Fellow of the International Institue of Acoustics and Vibration.

Patents: Pavlov, A.; A.T. Zaremba: Sensorless control system for induction motor employing direct torque and flux regulation, Patent: 6433506 2002. Veenhuizen, P.A.: Regelmethode voor een oneindig variabele transmissie, Patent: 1021578 2002. Veenhuizen, P.A.: System for regulating a gear transmission ratio, Patent: 19757328 2002.


14. Overview of research input and output . 14.1 Input “Systems, Dynamics and Control” related to EM, 2002

Sources of financing1 Total 1 2 3 number fte Senior academic staff 16 1 - 17 2.9 Supporting staff 4 - - 4 -2

PhD 2.5 4 4.5 11 8.83

Postdocs 2 1 - 3 2 Total 24.5 6 4.5 35 13.7

1 Sources of financing: 1: University 2: STW, SON, NWO, FOM, EM 3: Industry, TNO, Brite-Euram, Nuffic, Min. Econ. Affairs, etc. 2 No research input involved for supporting staff. 3 Research input per PhD per year: 0.8 fte

14.2 Output “Systems, Dynamics and Control” related to EM, 2002

Total Scientific publications: refereed journals 11+1* Scientific publications: books, chapters in book - Scientific publications: refereed proceedings 16+1* PhD theses 2

* In cooperation with other EM-groups.

15. Co-operation with other EM-groups: project title, participating groups, participants and research input in fte.

Project Title: ADOPT: Sequential Approximate Design Optimization including

uncertainties, discontinuities and discrete design variables. Participating Groups: Systems, Dynamics and Control (TU/e) Structural Optimization and Computational Mechanics (TUD) Aerospace Structures and Computational Mechanics (TUD) Participants: Dr.Ir. L.F.P. Etman (TU/e), Ir. S.P. Gurav (TUD),

Ir. J.H. Jacobs (TU/e), Prof.Dr.Ir. A. van Keulen (TUD), Dr. J.J.M. Rijpkema (TU/e), Ir. R.A. van Rooij (TU/e), Dr.Ir. A.J.G. Schoofs (TU/e), Ir. K. Vervenne (TUD).

Research Input in fte: 2.4


3. RESEARCH DOCUMENTATION OF THE GROUP MATERIALS TECHNOLOGY

1. University/Department.

Eindhoven University of Technology Department of Mechanical Engineering / Department of Biomedical Engineering

2. Subprogrammes related to research school EM. 2.1 Fluid Mechanics 2.2 Solid Mechanics 2.3. Structural Mechanics 2.4 Biomechanics

3. Group directors. Prof.Dr.Ir. F.P.T. Baaijens Prof.Dr.Ir. M.G.D. Geers Prof.Dr.Ir. H.E.H. Meijer

4. Senior academic staff: name, position, research input in fte related to research school EM.

Anderson, Dr.Ir. P.D. UD 0.2 Baaijens, Prof.Dr.Ir. F.P.T. Full Professor 0.2 Bader, Prof.Dr. D.L. Part-time Professor p.m. Barosan, M.Sc. I. UD 0.1 Bouten, Dr. C.V.C. UHD 0.2 Brekelmans, Dr.Ir. W.A.M. UHD 0.3 Geers, Prof.Dr.Ir. M.G.D. Full Professor 0.3 Govaert, Dr.Ir. L.E. UD 0.2 Hulsen, Dr.Ir. M.A. UD 0.2 Huyghe, Dr.Ir. J.M.R.J. KNAW-fellow 0.2 Meijer, Prof.Dr.Ir. H.E.H. Full Professor 0.2 Oomens, Dr.Ir. C.W.J. UHD 0.2 Peerlings, Dr.Ir. R.H.J. UD 0.3 Peters, Dr.Ir. G.W.M. UHD 0.2 Pijls, Prof.Dr. N. Part-time Professor p.m. Rutten, Dr.Ir. M.C.M. UD 0.2 Schreurs, Dr.Ir. P.J.G. UHD 0.3 Vellinga, Dr.Ir. W.P. UD 0.2 Vree, Ir. J.H.P. de Wismans, Prof.Dr.Ir. J.S.H.M. Witteman, Dr.Ir. W.J. Zhang, Prof.Dr.Ir. G.Q.

UD Part-time Professor UD Part-time Professor

0.3 0.1 0.2 0.1

Total fte: 4.2



5.2 Solid Mechanics

Bagdu, M.Sc. C. (PhD 2) Solder joint fatigue MeMa Boers, ir. S.H.A. (PhD 1) Flexible moulds MeMa Engelen, Ir. R.A.B. (PhD 3) CDM-gradient plasticity MeMa Evers, Ir. L.P. (PhD 3) Finite strain crystal plasticity MeMa Kasyanyuk, Ir. Y. (PhD 3) Fatigue damage in metals MeMa Massart, Ir. T (PhD 2) Multiscale Modelling of Damage in

Masonry Walls MeMa

Matin, Ir. M.A. (PhD 2) Experimental Assessment of Solder Joint Reliability

MeMa

Mediavilla, Ir. J. (PhD 3) Ductile damage to fracture modelling MeMa Ubachs, Ir. R.L.J.M. (PhD 2) Thermomechanical integrity of solder

joints MeMa

5.3 Structural Mechanics

Onraet, Ir. S. (PhD 3) PVD coatings MeMa Viatkina, Ir. E.M. (PhD 3) Strain path effects and forming limits MeMa

5.4 Biomechanics

Boerboom, Ir. R.A. (PhD 1) Heart valve collagen remodeling MeMa Breuls, Ir. R.G.M. (PhD 1) Damage evolution in muscle models MeMa Driessen, Ir. N.J.B. (PhD 1) Heart valve tissue differentation MeMa Gawlitta, Ir. D. (PhD 3) Damage evolution in enigneered muscle

tissue MeMa

Hendriks, Ir. F.M. (PhD 3) Mechanics of skin MeMa Heuvel, Ir. L. van de (PhD 1) Branchy therapy MeMa Peeters, Ir. E.A.G. (PhD 1) Cell-mechanics MeMa Stekelenburg, Ir. A. v. (PhD 1) Perfusion/reperfusion damage MeMa Stekelenburg, Ir. M. v. (PhD 1) Endothelial cell mechanics MeMa Stijnen, Ir. J.M.A. (PhD 1) Analysis of flow in the left heart-ventricle MeMa


Bazhlekov, Dr. I.; Bulgary

Viscoelastic breakup and coalescence (Theory) until 1-11-2002

2.1 CoMe

Fülöp, Dr.Ir. T.; Hungary

Micro-forming of metals, since 9-2001 2.4 MeMa

Galaktionov, Dr. A. S.; Ukraine

Mixing flows, until 1-11-2002 2.1 CoMe

7. Short description of subprogrammes related to research school EM. 7.1 Fluid Mechanics

This theme is focusing on structure development during flow of polymers. Polymers are widely used because of their energy efficient, cheap and fast processing and shaping characteristics, combined with principle flexibility of combining them in the molten state to achieve synergism in the final product. Structure development is, on one hand, due to the anisotropic nature of the long polymer chains that orient in flow and, on the other hand, caused by crystallization after flow and deformation, break-up and coalescence processes in two-phase flows. Predictive knowledge of structure development is necessary for making


precise products of high dimensional stability with well-tuned mechanical properties. Three areas of research can be discerned: 1. computational and molecular rheology 2. applied rheology and process modelling 3. chaotic mixing and two-phase flows. Related to research theme “Computational Mechanics”.

7.2 Solid Mechanics This theme couples the microstructure obtained e.g. via mixing or phase separating process and that can change during final shaping, to the resulting macroscopic product properties. Attention is paid to both material classes studied within CEM: polymers and metals. Reason is that the multiscale problems involved are very similar and solutions methods for local analysis and jumping the length-scales are simultaneously developed. Also properties of thin films, which can be different from the bulk, and hybrid polymer-metal laminates are being studied. Five areas can be discerned: 1. structure-property and constitutive modelling 2. multi-scale mechanics of polymers 3. microscopic aspects of deformation 4. micromechanics of (electro)mechanical devices, and 5. multi-scale mechanics and damage engineering in metals. Related to research themes “Computational Mechanics” and “Mechanics of Materials”.

7.3 Structural Mechanics

In this theme, new manufacturing methods for metals, sometimes combined with polymers, are being investigated and automotive applications, aiming at damage control and prevention, are being explored. The three areas of research are, consequently: 1. Hydro and hybrid forming and advanced manufacturing 2. Impact protection and safety in automotive applications and 3. Surface engineering. Related to research themes “Mechanics of Materials” and “Computational Mechanics”.

7.4 Biomechanics

Within the program Biomechanics and Tissue Engineering we apply principles from fluid and solid mechanics, and biology, to a variety of biomedical problems and devices. In particular, prevention, diagnosis and treatment of medical conditions and diseases of the cardio-vascular and the musculoskeletal systems are examined. Treatment may result in the engineering of living tissues and artificial implants, such as heart-valves, small diameter blood vessels, orthopaedic implants, and extracorporal systems and devices. These developments critically rely on the availability of various technologies, such as bioreactors and testing procedures, which are subjects of research. In all cases, numerical and experimental techniques offer powerful tools for biologically and clinically relevant research in these areas. Three major themes can be discerned: 1. Soft Tissue Biomechanics & Engineering 2. Cardiovasculair Biomechanics 3. Bone and Orthopaedic Biomechanics Related to research themes “Mechanics of Materials” and “Structural Mechanics”.


8. Refereed scientific publications 8.1 Refereed journals Agassant, J.F.; F.P.T. Baaijens; H. Bastian; A. Bernnat; A.C.B. Bogaerds; T. Coupez; B. Debbaut; A.L. Gavrus;

A. Goublomme; M. van Gurp; R.J. Koopmans; M.H. Laun; K. Lee; O.H. Nouatin; M.R. Mackley; G.W.M. Peters; G. Rekers; W.M.H. Verbeeten; B. Vergnes; M.H. Wagner; E. Wassner; W.F. Zoetelief: The Matching of Experimental Polymer Processing Flows to Viscoelastic Numerical Simulation; Int. Polymer Processing, 17(1), 3-10, 2002.

Anderson, P.D.; O.S. Galaktionov; G.W.M. Peters; H.E.H. Meijer; C.L. Tucker III: Material stretching in laminar mixing flows: extended mapping technique applied to the journal bearing flow; Int. J. Num. Meth. Fluids, 40(1-2), 189-196, 2002.

Bogaerds, A.C.B.; A.M. Grillet; G.W.M. Peters; F.P.T. Baaijens: Stability Analysis of Polymer Shear Flows Using the Extended Pom-Pom Constitutive Equations; J. Non-Newtonian Fluid Mech., 108(1-3), 187-208, 2002.

Brands, D.W.A.; P.H.M. Bovendeerd; J.S.H.M. Wismans: On the potential importance of non-linear viscoelastic material modelling for numerical prediction of brain tissue response: test and application; Stapp Car Crash Journal, 46(1), 103-121, 2002.

Breuls, R.G.M.; B.G. Sengers; C.W.J. Oomens; C.V.C. Bouten; F.P.T. Baaijens: Predicting local cell deformations in engineered tissue constructs: A multilevel finite element approach; J. Biomech. Engng., 124, 198 - 207, 2002.

Delhaas, T.; S. van Engeland; J. Broers; C.V.C. Bouten; N. Kuijpers; F. Ramaekers; L.H.E.H. Snoeckx:

Quantification of cytoskeletal deformation in living cells based on hierarchical feature vector matching; Am. J. Physiol., 283(2), C639-C645, 2002.

Evers, L.P.; D.M. Parks; W.A.M. Brekelmans; M.G.D. Geers: Crystal plasticity model with enhanced hardening by geometrically necessary dislocation accumulation; J. Mech. Phys. Solids, 50(II), 2403-2424, 2002.

Galaktionov, O.S.; P.D. Anderson; G.W.M. Peters; C.L. Tucker III: A Global, Multi-Scale Simulation of Laminar Fluid Mixing: The Extended Mapping Method; Int. J. of Multiphase Flow, 28(3), 497-523, 2002.

Galaktionov, O.S.; P.D. Anderson; G.W.M. Peters; H.E.H. Meijer: Mapping approach for 3D laminar mixing simulations: application to industrial flows; Int. J. Num. Meth. Fluids, 40(3-4), 345-351, 2002.

Galaktionov, O.S.; P.D. Anderson; G.W.M. Peters: Structure development during chaotic mixing in the journal bearing flow; Phys. Fluids, 14(9), 3009-3017, 2002.

Galaktionov, O.S.; P.D. Anderson; G.W.M. Peters; H.E.H. Meijer: Morphology Development in Kenics Static Mixers (Application of the Extended Mapping Method); CJCHE, 80(6), tbd-tbd, 2002.

Geerts-Ossevoort, L.; P.H.M. Bovendeerd; F.W. Prinzen; T. Arts; K. Nicolay: Myofiber Orientation in the Normal and Infarcted Heart, Assessed with MR-Diffusion Tensor Imaging. Am. J. Physiol., 283, H126-H138, (in co-operation with Systems, Dynamics and Control Group of the TU/e), 2002.

Goijaerts, A.M.; L.E. Govaert; F.P.T. Baaijens: Experimental and numerical investigation on the influence of processing speed on the blanking process; J. Manufact. Sci. Eng., 124, 416-419, 2002.

Grillet, A.M.; A.C.B. Bogaerds; G.W.M. Peters; F.P.T. Baaijens: Stability analysis of constitutive equations for polymer melts in viscometric flows; J. Non-Newtonian Fluid Mech., 103(5), 221-250, 2002.

Grillet, A.M.; A.C.B. Bogaerds; G.W.M. Peters; M.J.H. Bulters; F.P.T. Baaijens: Numerical analysis of flow mark; J. Rheol., 46(3), 651-670, 2002.

Harrison, P.; G.W.M. Peters; F.P.T. Baaijens: Birefringence measurements on polymer melts in an axisymmetric flowcell; Rheol. Acta, 41(1-2), 114-133, 2002.

Huyghe, J.M.R.J.; C.F. Janssen; C.C. van Donkelaar; Y. Lanir: Measuring principles of frictional coefficients in cartilaginous tissues and its substitutes; Biorheology, 39(1,2), 47-53, 2002.

Kouznetsova, V.G.; M.G.D. Geers; W.A.M. Brekelmans: Multi-scale constitutive modelling of heterogeneous materials with a gradient-enhanced computational homogenization scheme; Int. J. Numer. Meth. Engng, 54, 1235-1260, 2002.


Peerlings, R.H.J.; R. de Borst; W.A.M. Brekelmans; M.G.D. Geers: Localisation issues in local and nonlocal continuum approaches to fracture; Eur. J. Mech. A/Solids, 21, 175-189, (in co-operation with group Engineering Mechanics (1) (TUD)), 2002.

Pelt, W.W.G.J. van; J.G.P. Goossens; H.E.H. Meijer; P.J. Lemstra: Processing of intractable polymers using reactive solvents. 6. A new reactive solvent concept based on reversible depolymerisation; Polymer, 43(21), 5699-5708, 2002.

Peters, G.W.M.; F.H.M. Swartjes; H.E.H. Meijer: A Recoverable Strain based Model for Flow-induced Crystallization; Macromol. Symp., 185, 277-292, 2002.

Pijls, N.H.J.; B. De Bruyne; L. Smith; W. Aarnoudse; G.J.W. Barbato; J. Bartunek; G.J.W. Bech; F.N. van de Vosse: Coronary Thermodilution to Assess Flow Reserve; Validation in Humans; Circulation, 105(21), 2482-2486, 2002.

Rens, B.J.E. van; W.A.M. Brekelmans; F.P.T. Baaijens: Modeling friction near sharp edges using a Eulerian reference frame: appliction to aluminium extrusion; Int. J. Numer. Meth. Engng, 54, 453-471, 2002.

Schrauwen, B.A.G.; L.E. Govaert; G.W.M. Peters; H.E.H. Meijer: The influence of flow-induced crystallization on the impact toughness of high-density polyethylene; Macromol. Symp., 185(1), 89-102, 2002.

Tyagi, S.; A. Ghosh; P. Montanari; G.W.M. Peters; H.E.H. Meijer: Linear Viscoelastic and Transient Behavior of Polypropylene and Ethylene vinyl acetate Blends; An Evaluation of the Linear Palierne and a Nonlinear Viscoelastic Model. Polymer Engng. & Sc., 42(11), 2107-2119, 2002.

Vellinga, W.P.; R. Rastogi; H.E.H. Meijer: Microscopic phenomenology of plastic deformation in polymer-metal laminates; Mat. Res. Soc. Symp. Proc., 695, 21-26, 2002.

Vendelin, M.; P.H.M. Bovendeerd; V. Saks; J. Engelbrecht: Cardiac Mechano-energetics in Silico; Neuroendocrinol Lett, 23, 13-20, 2002.

Vendelin, M.; P.H.M. Bovendeerd; J. Engelbrecht; T. Arts: Optimizing ventricular fibers: uniform strain or stress, but not ATP consumption, leads to high efficiency; Am. J. Physiol., 283, H1072-H1081, 2002.

Verbeeten, W.M.H.; G.W.M. Peters; F.P.T. Baaijens: Viscoelastic analysis of complex polymer melt flows using the extended Pom-Pom model; J. Non-Newtonian Fluid Mech., 108(1-3), 301-326, 2002.

Woude, L.H.V. van der; C.V.C. Bouten; H.E.J. Veeger; T. Quinn: Aerobic work capacity in elite wheelchair

athletes: a cross-sectional analysis; Am. J. Phys. Med. Rehab, 81, 261-271, 2002.

Zhang, J.Z.; D.H. van Campen; G.Q. Zhang; V.P. Bouwman: Stability and bifurcation of doubly curved shallow panels under quasi-static uniform load; Int. J. Non-Linear Mech., 38(4), pp, 2002.

8.2 Books, chapters in book

Huyghe, J.M.R.J.; C.F. Janssen; Y. Lanir; C.C. van Donkelaar; A. Maroudas; D.H. van Campen: Experimetal measurement of electric conductivity and electro-osmotic permeability of ionised porous media; In: Porous media: theoretical, experimental and numerical applications; Eds: W. Ehlers and J. Bluhm, 295-313, Springer Verlag, Berlin, Book Chapter, ISBN 3-540-43763-0, 2002.

Huyghe, J.M.R.J.; R. van Loon; F.P.T. Baaijens; P.M. van Kemenade; T.H. Smit: We all are porous media; In: Poromechanics II; Eds: J.-L. Auriault, C. Geidreau, P. Royer, J.-F. Bloch, C. Boutin, J. Lewandowska, 17-28, Swets and Zeitlinger, Lisse, The Netherlands, Book Chapter ISBN 9058093948, 2002.

Molenaar, M.M.; J.M.R.J. Huyghe: An electro-chemo-mechanical mixture formulation of shale; In: Chemo-mechanical coupling in clays; Eds: C. Di Maio, T. Hueckel and B. Loret, 247-260, Swets & Zeitlinger, Lisse, The Netherlands, Book Chapter ISBN 9058093840, 2002.


Anderson, P.D.; B.J. Keestra; O.S. Galaktionov; G.W.M. Peters; H.E.H. Meijer: Structure Development in Mixing Flows; In: 18th Annual Meeting Polymer Processing Society; Eds: Jose Covas, Plenary lecture, Guimarães , Portugal, CD-ROM, 2002.

Anderson, P.D.; O.S. Galaktionov; G.W.M. Peters; H.E.H. Meijer: Mixing and structure development in 3D chaotic mixing flows; In: ANTEC 2002; Eds: SPE, San Francisco, United States, CD-ROM, 2002.


Aydemir, A.; J.H.P. de Vree; M.G.D. Geers: Finite Element Process Simulation for Hydro-mechanical Deep-Drawing; In: Proc. of the 10th International Conference on Machine Design and Production; Eds: A. Erden, M. Akkök, S.E. Kilic, Cappadocia, Turkey, 101-109, 2002.

Baaijens, F.P.T.; S.P. Hoerstrup; C.V.C. Bouten; N.J.B. Driessen; D. Gawlitta; J. de Hart; R. van Loon; A. Mol; G.W.M. Peters: Towards optimal mechanical in vitro conditioning of bioprosthetic aortic heart valves; In: Cardiovascular Pathology, 11; Editors: ISACB, St. Gallen, Switzerland, 34, 2002.

Bouten, C.V.C.; E.M.H. Bosboom; C.W.J. Oomens; F.P.T. Baaijens: Deformation as a trigger for pressure sore related muscle damage; In: Proc. of the 13th Conf. of the European Society of Biomechanics. Eds: R. Bedzinski, C. Pezowicz, K. Scigala, Wroclaw, Poland, 485-486, 2002.

Breuls, R.G.M.; R.A.A. Pullens; C.V.C. Bouten; C.W.J. Oomens; F.P.T. Baaijens: An in-vitro engineered skeletal muscle model to study compression induced cell damage; In: Proc. Banff Symposium on skeletal muscle. Eds: Herzog, W., Banff, Canada, 53, 2002.

Breuls, R.G.M.; B.G. Sengers; C.W.J. Oomens; C.V.C. Bouten; F.P.T. Baaijens: A multi-scale finite element approach to determine local cell and tissue deformations; In: Proc. 4th World Congress on Biomechanics. Eds: Omnipress, Calgary, Canada, CD-ROM, 2002.

Engelen, R.A.B.; M.G.D. Geers; R.H.J. Peerlings; R.L.J.M. Ubachs: On non-local damage coupled to a J2-plasticity framework; In: Proc. of the Fifth World Congress on Computational Mechanics (WCCM V). Eds: H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner, Vienna, Austria, wccm.tuwien.ac.at, 2002.

Evers, L.P.; W.A.M. Brekelmans; M.G.D. Geers: Different types of dislocation densities in a crystal plasticity model for FCC models; In: Proc. of the Fifth World Congress on Computational Mechanics. Eds: H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner, Vienna, Austria, www.tuwien.ac.at, 2002.

Galaktionov, A.S.; P.D. Anderson; G.W.M. Peters; H.E.H. Meijer: Interface generation in Kenics static mixers: optimization; In: 18th Annual Meeting Polymer Processing Society; Eds: Jose Covas, Guimaraes, Portugal, CD-ROM, 2002.

Geers, M.G.D.; S.H.A. Boers; P.J.G. Schreurs: Geometrically nonlinear and strongly nonlocal gradient plasticity om the simulation of the score forming process; In: Proc. of the Fifth World Congress on Computational Mechanics. Eds: H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner, Vienna, Austria, www.tuwien.ac.at, 2002.

Geers, M.G.D.; V.G. Kouznetsova; W.A.M. Brekelmans: Perspectives in multi-scale modelling of composite and heterogeneous materials upon localization; In: Proc. of the Fifth World Congress on Computational Mechanics. Eds: H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner, Vienna, Austria, www.tuwien.ac.at, 2002.

Geers, M.G.D.; V.G. Kouznetsova; W.A.M. Brekelmans: Multi-scale mechanics in micro-electronics: a paradigm in miniaturization; In: Proc. of EuroSIME 2002; Editors: L.J. Ernst, G.Q. Zhang, R. Dudek, O. de Saint Leger, Paris, France, 133-139, 2002.

Keestra, B.J.; P.D. Anderson; F.N. van de Vosse; H.E.H. Meijer: Phase separation in a homogeneous shear-flow; In: ANTEC 2002; Eds: SPE, San Francisco, United States, CD-ROm, 2002.

Massart, T.J.; P. Bouillard; M.G.D. Geers; R.H.J. Peerlings: Representation of anisotropic damage in masonry material; In: Proc. of the Fifth World Congress on Computational Mechanics (WCCM V); Editors: H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner, Vienna, Austria, wccm.tuwien.ac.at, 2002.

Meuwissen, M.H.H.; H.A. de Boer; H.L.A.H. Steijvers; P.J.G. Schreurs; M.G.D. Geers: Residual stresses in microelectronics induced by thermoset packaging materials during cure; In: Proc. of EuroSIME 2002; Editors: L.J. Ernst, G.Q. Zhang, R. Dudek, O. de Saint Leger, Paris, France, 332-339, 2002.

Oomens, C.W.J.; M. Maenhout; C.H.G.A. van Oijen; M.R. Drost: A three dimensional finite element model for contracting skeletal muscle; In: Acta of Bioengineering and Biomechanics, 4, supplement1, Eds: R.Bedzinski, C.Pezowicz,K.Scigala, Wroclaw, Poland, 589-590, 2002.

Peerlings, R.H.J.; N.A. Fleck: A numerical framework for homogenisation towards higher-order media; In: Proc. of the Fifth World Congress on Computational Mechanics (WCCM V); Eds: H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner, Vienna, Austria, wccm.tuwien.ac.at, 2002.

Peeters, E.A.G.; C.V.C. Bouten; C.W.J. Oomens; L.H.E.H. Snoeckx; F.P.T. Baaijens: The biomechanical response of single muscle cells under compression; In: Proc. of the 13th Conf. of the European Society of Biomechanics. Eds: R. Bedzinski, C. Pezowicz, K. Scigala, Wroclaw, Poland, 56-57, 2002.


Rutten, M.C.M.; M.W. Wijlaars; G.J. Strijkers; C.V.C. Bouten; G.W.M. Peters; F.P.T. Baaijens: The valve exerciser: a new bioreactor for dynamic aortic valve culture; In: Cardiovascular Pathology, 11; Editors: ISACB, St. Gallen, Switzerland, 56, 2002.

Schreurs, P.J.G.; Fatigue Damage in Solder Joints; In: Proc. of the Fifth World Congress on Computational Mechanics (WCCM V); Eds: H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner, July 7-12, Vienna, Austria, 10, 2002.

Ubachs, R.L.J.M.; P.J.G. Schreurs; M.G.D. Geers: Microstructural evolution of solder joints subjected to thermomechanical loading; In: Proc. of the Fifth World Congress on Computational Mechanics. Eds: H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner, Vienna, Austria, www.tuwien.ac.at, 2002.

Viatkina, E.M.; W.A.M. Brekelmans; M.G.D. Geers: Forming limit diagrams for sheet deformation processes: a crystal plasticity approach; In: Proc. of the Fifth World Congress on Computational Mechanics. Eds: H.A. Mang, F.G. Rammerstorfer, J. Eberhar, Vienna, Austria, www.tuwien.ac.at, 2002.

9. Dissertations related to research school EM: name, title, university, date and advisors.

Name: Bogaerds, A.C.B. Title: Stability analysis of viscoelastic flows.

TU/e, December 2002 Advisors: Prof.dr.ir. F.P.T. Baaijens Prof.dr.ir. H.E.H. Meijer Co-Advisor: Dr.ir. G.W.M. Peters Current position: Employee, DSM, Geleen Name: Dooley, J. Title: Viscoelastic flow effects in multilayer polymer coextrusion,

TU/e, June 2002 Advisors: Prof.dr.ir. H.E.H. Meijer Prof.dr.ir. F.P.T. Baaijens Co-Advisor: Prof.dr. K.S. Hyun Current position: Employee, DOW Chemical, USA Name: Galaktionov, A.S. Title: Optimization of distributive mixing: from prototype flows to industrial

Devices, TU/e, October 2002

Advisors: Prof.dr.ir. H.E.H. Meijer Prof.dr.ir. F.P.T. Baaijens Co-Advisor: Dr.ir. P.D. Anderson Current position: Employee, NIOO-KNAW, Yerseke Name: Hart, J. de Title: Fluid-structure interaction in the aortic valve: a three-dimensional

computational analysis. TU/e, March 2002

Advisors: Prof.dr.ir. F.P.T. Baaijens Prof.dr.ir. H.E.H. Meijer Co-Advisor: Dr.ir. G.W.M. Peters Current position: Post-doc, AMC, Amsterdam


Name: Kouznetsova, V.G. Title: Computational homogenization for the multi-scale analysis of multi-

phase materials. TU/e, December 2002

Advisors: Prof.dr.ir. M.G.D. Geers Prof.dr.ir. F.P.T. Baaijens Co-Advisor: Dr.ir. W.A.M. Brekelmans Current position: Fellow, NIMR, Delft/Eindhoven Name: Maenhout, M. Title: Strain fields within contracting skeletal muscle.

UM, March 2002 Advisors: Prof.dr. H. Kuipers Prof.dr.ir. F.P.T. Baaijens Co-Advisors: Dr.ir. M.R. Drost Dr.ir. C.W.J. Oomens Current-position: Post-doc, Universiteit Maastricht, Maastricht Name: Melick, H.G.H. van Title: Deformation and failure of polymer glasses.

TU/e, May 2002 Advisors: Prof.dr.ir. H.E.H. Meijer Prof.dr.ir. F.P.T. Baaijens Co-Advisor: Dr.ir. L.E. Govaert Current position: Employee, DSM, Geleen Name: Stegeman, Y.W. Title: Time dependent behavior of droplets in elongational flows.

TU/e, June 2002 Advisors: Prof.dr.ir. H.E.H. Meijer Prof.dr.ir. F.N. van de Vosse Current position: Employee, Philips Research Laboratories, Eindhoven


Prof.Dr.Ir. F.P.T. Baaijens: • Advisory editor of Comp. Meth. Appl. & Eng. • Member editorial board J. of Non-Newt. Fluid Mech. Prof.Dr.Ir. H.E.H. Meijer: • Member of Executive Advisory Board Polymer Science (Macromolecular Chemistry

and Physics, Macromolecular Rapid Communication, Macromolecular Theory and Simulation, Macromolecular Materials and Engineering, Macromolecular Symposia)

• Local Editor International Polymer Processing • Editor Polymer Processing and Structure-Performance for the Encyclopedia on

Material Science Prof.dr.ir. M.G.D. Geers:

• Editorial board Journal for Multiscale Computational Engineering

11. Keynote lectures and seminars. -----


12. Membership international scientific committees.

Prof.Dr.Ir. M.G.D. Geers • Member of the Scientific Committee of ESAFORM • Member of the Technical Committee of EuroSime (Thermal and Mechanical

simulation in micro-electronics) Prof.Dr.Ir. H.E.H. Meijer • President-elect of the Polymer Processing Society, PPS • President of the international Polymer Processing Society, PPS • International Representative in the European Society of Rheology, ESR • International Representative in the Internat. Committee on Rheology, ICR


• N.J.B. Driessen: M.Sc. Award for industry 2002 (area Biochemistry/Biotechnology) of the ‘Koninklijke

Hollandsche Maatschappij der Wetenschappen’.

• T. Massart: First prize award for the best presentation at the Fifth Engineering Mechanics

Symposium at Rolduc, Kerkrade, The Netherlands, November 18-19, 2002 • E.A.G. Peeters: Second prize of the Students Award at the European Society of Biomechanics at

Wraclow, Poland, September 1-4, 2002

14. Overview of research input and output. 14.1 Input “Materials Technology” related to EM, 2002

Sources of financing1 Total 1 2 3 number fte Senior academic staff 22 - - 22 4.2 Supporting staff 2 - - 2 -2

PhD 9 4 8 21 16.83

Postdocs - - 3 3 2.4 Total 33 4 11 48 23.4

1 Sources of financing: 1: University 2: STW, SON, NWO, Fom 3: Industry, TNO, Brite-Euram, Nuffic, Min. Econ. Affairs, NIMR, DPI etc. 2 No research input involved for supporting staff 3 Research input per PhD per year: 0.8 fte


14.2 Output “Materials Technology” related to EM, 2002

Total Scientific publications: refereed journals 29+2* Scientific publications: books, chapters in book 3 Scientific publications: refereed proceedings 23 PhD theses 8

* In co-operation with other EM-groups.


Project Title: Multiscale Methods in Computational Mechanics Participating Groups: Engineering Mechanics (1) (TUD)

Structural Optimization and Computational Mechanics (TUD) Materials Technology (TU/e) Participants: Prof.Dr.Ir. R. de Borst (TUD), Prof.Dr.Ir. F. van Keulen (TUD),

Dr.Ir. J.M.R.J. Huyghe (TU/e)


4. RESEARCH DOCUMENTATION OF THE GROUP COMPUTATIONAL SCIENCE AND ENGINEERING1


Eindhoven University of Technology Department of Mathematics and Computing Science

2. Subprogrammes related to research school EM. 2.1 Scientific Computing 2.2 Applied Analysis

3. Group directors.

Prof.Dr.Ir. J. de Graaf Prof.Dr. R.M.M. Mattheij


Graaf, Prof.Dr.Ir. J. de Full Professor 0.1 Maten, Dr. J. ter UD, main position at Philips-Research 0.1 Mattheij, Prof.Dr. R.M.M. Full Professor 0.2 Maubach, Dr. J.M.L. UD 0.3 Molenaar, Prof.Dr. J. Part-time Professor 0.1 Morsche, Dr. H.G. ter UHD 0.2 Schilders, Prof.Dr. W.H.A. Part time Professor, main position at Philips-

Research 0.1

Tijsseling, Dr.Ir. A.S. UD 0.1 Ven, Dr.Ir. A.A.F. van de UHD 0.3 Total fte: 1.5


5.1 Scientific Computing

Cherbakov, M.Sc. Y (PhD 3) FDTD CoMe Drenth, Drs. W. (PhD 2) Num Lab CoMe Heres, Ir. P. (PhD 3) Model reduction MeMa Houben, Ir. S. (PhD 3) Circuit simulation CoMe Tasic, M.Sc. B. (PhD1/2) Numerical solution of dynamical

systems CoMe

1 Per 2002 the activities of the previous EM groups “TU/e – Scientific Computing” and “TU/e – Applied Analysis” are combined within the new EM-group “TU/e – Computational Science and Engineering”.


5.2 Applied Analysis Bekers, Ir. D.J. (PhD 3) Finitely large phased arrays of

microstrip antennas MeMa

Gramberg, Ir. H.J.J. (PhD 1) Front instabilities in injection moulding of polymer melts

MeMa

Gunawan, Drs. A.Y. (PhD 2) Morphology of polymer blends MeMa Hagman, Ir. F. (PhD 1) Biomechanical foot model for the kinetic

analysis of locomotion MeMa

Kroot, Ir. J.M.B. (PhD 3) Analysis and simulation of current distributions in coils

MeMa

Severens, Ir. I.E.M. (PhD 3) Modelling of direct imaging processes in photo copiers

MeMa

Smolders, Ir. S.M.P. (PhD 3) Optimization of injection moulding of Compact Discs

MeMa

6. Postdocs: name, country, project title, research theme EM and period of stay. Dubbeldam, Dr. J.L.A. NL

Postponing polymer processing instabilities November 2000-November 2003

2.1 MeMa

Rook, Dr. R.

LDC for Maxwell's equation 1 April 2002- 1 April 2005

2.5 CoMe

Nefodov, Dr. V.; Russia

Numerical analysis of visous flow using composite grids, Since October 2001

2.1 CoMe


7.1 Scientific Computing The main emphasis in this programme is on analysis and numerical simulation of problems arising in technology. Research is often induced by specific applications, yet being seen as part of a larger area where mathematical tools and in particular numerical methods can be applied. Hence both fundamental (numerical) research and applying the results to specific applications are typical for Scientific Computing. The following areas specify the actual research:

7.1.1 Glass Morphology Analysis and simulation of the glass flow in (partially) confined areas, such as in mould for producing jars and bottles. Flows in a glass tank (oven). Investigating the heat transport by various phenomena, like diffusion and convection. Co-operation in this research is with Vereenigde Glasfabrieken and TNO-TPD ceramics and glass. Furthermore within the Eindhoven University of Technology with the departments of Mechanical Engineering and Chemistry. Related to research themes Computational Mechanics and Mechanics of Materials

7.1.2 Ordinary Differential Equations and DAE

Problems that exhibit an evolutionary character will result in ODE after spatial discretisation. Moreover problems in control and mechanics often lead to such equations more directly. Quite often they are coupled with some (algebraic) constraint equations, resulting in DAE. Matters like stability and accuracy of numerical methods still provide for important questions. Co-operation exists with the TU/e-department of Mechanical Engineering. Related to research theme Computational Mechanics.


7.1.3 Large Scale System Solving

In solving partial differential equations numerically, one encounters complex larger (non)linear systems which exhibit a sparsity structure. In order to be able to solve them one need special iterative solvers, like multigrid. In this area one can also often employ parallel architectures fruitfully. Co-operation exists with TNO-TPD and the TU/e-department of Computer Science. Related to research theme Computational Mechanics.

7.1.4 Modelling and Finite Element Applications

Although there exists a variety of FEM packages, it is often necessary to tailor methods for specific problems. Further development and improving them is a core activity. A particular aspect is the visualisation, which is increasingly important due to the ever increasing complexity of problems to be solved. Related to research theme Computational Mechanics.

7.1.5 Boundary Element Methods and Approximation

The research on BEM is concentrating on the quality of approximations of nonhomogeneous problems. In particular it is investigated how various basic approximation methods like radial basis functions lead to convergence and therefore efficient methods. Related to research theme Computational Mechanics.

7.1.6 Platforms for Computation and Visualisation

The main theme is related to a platform, called NUMLAB, which enables the user to do computations by simply called (larger or smaller) kernels. Related to research theme Computational Mechanics.

7.2 Applied Analysis

The main emphasis in this programme is on mathematical analysis of technological problems. Research is often fostered by specific application, after which it may trigger more fundamental, and thus more generally applicable research.

7.2.1 Mathematical Methods in Continuum Physics • Slow viscous flow of polymeric melts: considered is the mathematical simulation of

manufacturing processes for polymers such as extrusion and injection moulding. These processes are considered as slow viscous (Stokes-) flows. The polymeric melts are described as nonlinear thermoviscoelastic fluids. Analytical and numerical evaluation of the resulting system of partial differential equations is looked for. Special points of attention are:

- Research to origins of instabilities/distortions occurring in these processes; - Modelling of boundary conditions (slip or stick); - Influences of thermal effects and pressure (compressibility); - Residual stresses and/or deformations in final products (e.g. compact discs); - Morphology of polymer mixtures; break-up of liquid threads.

• Biomechanical foot model: The development of a biomechanical foot model, which can be used in clinical gait analysis, to analyse foot motion during locomotion.

• Modelling of direct imaging processing in photocopiers: Description of the toner particles between drum and dip roller, including collision, friction, and electromagnetic forces. Modelling of the toner as a granular medium or as a conglomerate of many rigid particles. Numerical simulation on basis of discrete element analysis.

• Analysis and numerical simulation of electrodynamic devices as antennas and gradient coils


7.2.2 Fundamental Analysis of (Non-Linear) Evolution Problems Our research in functional analysis is concentrated on evolution equations. An inspiring source of inspiration are non-linear evolution equations arising from free boundary value problems in quasi-stationary fluid dynamics (Stokes flow, Hele-Shaw flow, polymer flow).

7.2.3 Mathematical Methods for Impacting Oscillators In this subprogramme the dynamics of oscillating systems with impacts is studied. These

systems show universal bifurcation behaviour, such as `period-adding’ bifurcations. Applications of the theory are found in atomic force microscopy, an experimental method to scan the detailed structure of surfaces from interactions between the surface and an oscillating probe.

7.2.4 Industrial Mathematics

Problems and questions from industry. All subprogrammes within 7.2 are related to research theme “Mechanics of Materials”.


8.1 Refereed journals Gunawan, A.Y.; J. Molenaar; A.A.F. v. d. Ven: In-phase and out-of-phase break-up of two immersed liquid

threads under influence of surface tension; European Journal of Mechanics B/Fluids, 21, 399-412, 2002.

Mattheij, R.M.; V. Nefedov: Simulation of Flow in a Glass Tank, in: Nonlinear Partial Differential Equations and Their Applications; (D. Cioranescu J.L Lions eds), North Holland, Amsterdam, 571-590, 2002.

Perrey-Debain, E.; H.G. ter Morsche: B-spline approximation and fast wavelet transform for an efficient evaluation of particular solutions for Poisson’s equation; Eng Anal with bound Elements 26, 1-13, 2002.

Smith, W.R. ; H.J.J. Gramberg: Mathematical modelling of moisture-induced panel deformation; Journal of Engineering Mechanics, 43, 347-366, 2002.

Smolders, S.M.P.; H.P. Urbach: On the determination of dopant-concentration profiles by grazing emission X-ray fluorescence spectroscopy using the maximum-entropy method; Journal of Engineering Mechanics, 43, 115-134, 2002.

8.2 Books, chapters in books

Mattheij, R.M.M.; J. Molenaar: Ordinary Differential Equations in Theory and Practice; SIAM, Philadelphia, 2002 (405 pages) Ven, A.A.F. v.d.: Modelling of Industrial Processes for Polymer Melts: Extrusion and Injection Moulding; In: Mathematical Modelling for Polymer Processing. Polymerization, Crystallization, Manufacture; ed. V. Capasso, Springer, Berlin, pp. 263-309, 2002.


Chandra, T.D.; J. de Graaf: On an operator equation for Stokes boundary value problems; In: Ed. J. Bemelmans e.a., Proc. 4th European Conf. on Elliptic and Parabolic Problems held in Rolduc and Geata 2001. World Scientific Singapore ISBN 981-238-045-0. Gramberg, H.J.J.; A.A.F. v. d. Ven: Thermally induced flow front instabilities in injection moudling; In: Progress in Industrial Mathematics at ECMI2000; eds. A.M. Anile, V. Capasso and A. Greco, Springer, Berlin, pp. 433-438, 2002. Houben, S.H.M.J.; J.M. Maubach: An accelerated Poincare-map methods for finding the PSS of Autonomous oscillators, in Progress in Industrial Mathematics at ECMI 2000, (A.M. Anile, V. Capasso, and A. Greco eds), Springer, 266-271, 2002.


Laevsky, K.; R.M.M. Mattheij: Numerical Simulation of the Plunger Velocity; in: Progress in Industrial Mathematics at ECMI 2000, (A. Anile et al eds), Springer, Berlin, 230-235, 2002.

Lin, T. J. Heijmen; J. ter Maten; M. Kole: ADAPT: Design assistence for iterative analogue synthesis; Philips Research Laboratories, NatLab Manuscript NLMS 22.037, in: Analog 2002 - Entwicklung von Analogschaltungen mit CAE-Methoden (13-14 May 2002, Bremen), GMM-Fachbericht 38, VDE Verlag GMBH, Berlin (ISBN 3-8007-2695-5), pp. 195-200, 2002.

Mattheij, R.M.M.: The Changing Scene for Mathematics; in: Mathematical Glimpses into the 21st Century, C. Cascuberta et al. (eds), Societat Catalana de Matematiques, Barcelona, 16-21, 2002.

Mattheij, R.M.; V. Nefedov: Simulation of Flow in a Glass Tank, in: Nonlinear Partial Differential Equations and Their Applications; (D. Cioranescu J.L Lions eds), North Holland, Amsterdam, 571-590, 2002.

Maubach, J.M.; W.D. Drenth: Data Flow Oriented Visual Programming Libraries for Scientific Computing Lecture Notes on Computational Science no. 2329, ICCS 2002, (P.M.A. Sloot et al., eds.), Springer-Verlag Berlin Heidelberg, 2002, 429-438, 2002.

Schilders, W.H.A.: Iterative solution of linear systems in circuit simulation, Progress in Industrial Mathematics at ECMI 2000, A.M. Anile, V. Capasso, and A. Greco (editors), Springer (2002), 272-278.


Name: Chandra, D. Title: Perturbation and Operator Methods for Solving Stokes Flow and

Heat Flow Problems. Eindhoven University of Technology, May 2002. Advisors: Prof.Dr.Ir. J. de Graaf, Prof.Dr. J. Molenaar. Current position: State University of Malang, Indonesia. Name: Linden, B. van der Title: Radiative Heat Transfer in Glass.The Algebraic Ray Trace Eindhoven University of Technology, April 2002 Advisors: Prof.Dr. R.M.M. Mattheij, Prof.Dr.Ir. A.A. van Steenhoven Current position IT specialist at the scientific computing group

Name: Wang, Kaichun Title: BEM Simulation for Glass Parisons

Eindhoven University of Technology, January 2002 Advisors: Prof Dr R.M.M. Mattheij, Prof Dr C.S. Chen Current position: Scientist at Philips Medical Systems


Prof.Dr. R.M.M. Mattheij: • Associate editor SIAM News • Associate editor Surveys on Mathematics for Industry • Associate editor Electronic Journal of Boundary Elements • Editor Boundary Element Technology • Editor International Journal of Nonlinear Modelling in Sciences and Engineering • Editor Springer series on Mathematics for Industry

Prof.Dr. W.H.A. Schilders:


• Editor of COMPEL, the international journal for computation and mathematics in electrical and electronic engineering

• Editor of special volume Numerical Methods in Electromagnetics in series Handbook of Numerical Analysis (Elsevier)

Dr.Ir. A.A.F. van de Ven:

• International Journal of Applied Electromagnetics and Mechanics; • Journal of Engineering Mathematics;

11. Keynote lectures and seminars.

Prof.Dr. R.M.M. Mattheij: • Mathematical Modelling of Glass; MACSI Glass Days, Innsbruck, 21 November 2002 • Local Defect Correction for BEM; BeTeq, Beijing, 10 September 2002. Dr. J.M. ter Maten: •

•

•

•

•

•

•

•

Augmented Lagrangian algorithm for optimizing analog circuit design; ECMI-2002, Jurmala, Latvia, 9 Sept. 2002. Time domain analog circuit simulation; Int. Workshop on Computational Codes: the Technological Aspects of Mathematics, University of Bari, Italy, 18 December, 2002.

Dr. J. Maubach:

Computation and Visualisation in the NumLab; Numerical Laboratory VISMATH 2002 conference, Berlin, Deutschland, May 2002. Data Flow Oriented Visual Programming Libraries for Scientific Computing; International Conference of Computational Science ICCS 2002, Amsterdam, The Netherlands, April 2002.

Prof.Dr. W.H.A. Schilders:

Reduced order modelling with applications to electromagnetics and circuit simulation; Weierstrass Institute for Applied Sciences, Berlijn (D), April 11, 2002. Reduced order modelling with applications to electromagnetics and circuit simulation; University of Konstanz (D), April 24, 2002. Time integration methods for the numerical simulation of the Maxwell equations; TU Darmstadt (D), April 29, 2002. Coupled electromagnetic/circuit simulation, at the VI Congresso SIMAI, Chia Laguna (I), May 28, 2002.

12. Membership international scientific committees. Prof. Dr. R.M.M. Mattheij: • Co-ordinator, chairman of the board of MASCI-net: Mathematics, Simulation and

Computing for Industry • Member Scientific Committee BeTeq 2002, 2003 • Member Scientific Committee BETECH 2003 • Member Scientific Committee 2nd Int. Colloquium on Modelling of Glass Forming

and Tempering, MGFT2003 • Chairman and member of the Scientific Board ECMI2004


Prof.Dr. W.H.A. Schilders: • Chairman of local organizing committee SCEE-2002 Conference

13. Awards and patents. Ir. F. Hagman: A mathematical model analysing the motion of the calcaneus from pressure plate

measurements. Emed Scientific Meeting, Kananaskis, Canada, 2002. Winner of the Best Poster Presentation Award during Emed Scientific Meeting 2002.

14. Overview of research input and output. 14.1 Input “Computational Science and Engineering” related to EM, 2002

Sources of financing1 Total 1 2 3 number fte Senior academic staff 8 - 1 9 1.5 Supporting staff 1 - - 1 -2

PhD 2.5 2.5 7 12 9.63

Postdocs 2 - 1 3 1.4 Total 13.5 2.5 9 25 12.5

1 Sources of financing: 1: University 2: STW, SON, NWO, FOM 3: Industry, TNO, Brite-Euram, Nuffic, Min. Econ. Affairs, NIMR, DPI, etc. 2 No research input involved for supporting staff. 3 Research input per PhD per year: 0.8 fte

14.2 Output “Computational Science and Engineering” related to EM, 2002

Total Scientific publications: refereed journals 5 Scientific publications: books, chapters in book 2 Scientific publications: refereed proceedings 9 PhD theses 3


-----


5. RESEARCH DOCUMENTATION OF THE GROUP ENGINEERING MECHANICS (1)

1. University/Department. Delft University of Technology

Department of Aerospace Engineering

2. Subprogrammes related to research school EM. 2.1 Composite Materials 2.2 Advanced Computational Procedures 2.3 Fluid-Structure Interaction 2.4 Active Materials 2.5 Structural Dynamics

3. Group director. Prof.Dr.Ir. R. de Borst


Borst, Prof.Dr.Ir. R. de full Professor, Director Research School EM 0.5 Gutiérrez, Dr.Ir. M.A. UD 0.4 Hulshoff, Dr. S.J. UD 0.6 Suiker, Dr.Ir. A.S.J. UD 0.8 Tijssens, Dr.Ir. M.G.A. UD 0.6 Truteltaub, Dr. S.R. UD 0.6 Total fte: 3.5


Chung, Ir. D.B. (PhD b) Reliability of fibre-metal laminate structures CoMe Hagenbeek, Ir. M. (PhD b) Thermal and off-axis behaviour of GLARE MeMa Kononov, Dr. A.V. (PhD 1) Wave propagation in composites StDy Michler, Dipl.-Ing. C. (PhD 2) Fluid-structure interaction for low-speed flows CoMe Munts, Ir. E.A. (PhD 2) Fluid-structure interactions using multiscale

LES techniques CoMe

Remmers, Ir. J.J.C. (PhD b) Delamination buckling MeMa


6. Postdocs: name, country, project title, research theme EM and period of stay.

Abellan, Dr. M.A.; France

Failure computations in porous media, subprogramme 2, April 2002

2.2 CoMe

Kuhl, Dr. E.; Germany

Energy-conserving algorithms in fluid-structure interaction, August 2002

2.3 CoMe

7. Short description of subprogrammes related to research school EM. 7.1 Composite Materials

Research within the group is primarily directed to developing damage-based models for predicting delamination and matrix-cracking, particularly for fibre-metal laminates such as Glare. These are being applied to the prediction of fatigue durability and thermal behaviour, as well as the analysis of crack stoppers, splices and combined buckling/delamination phenomena. Secondly, the development of robust numerical techniques to optimise composite materials is an area of active research. Advanced methods drawn from optimal control and topology optimisation are investigated to design functionally graded composites. Related to the research theme "Mechanics of Materials"

7.2 Advanced Computational Procedures This sub-programme relates to the development of computational models for the simulation of the behaviour of materials and structures. For this purpose accurate and robust models are made for the temporal and spatial discretization and algorithms are constructed for the efficient, accurate and robust solution of the ensuing non-linear algebraic equations. As such it provides basic tools that are utilized in structural engineering research.

Related to the research theme "Computational Mechanics" 7.3 Fluid-structure interaction

The interaction of thin structures and (air) flows is becoming increasingly important. On one hand do composite materials offer the possibility to design wings and rotor blades with specific deformation capacities. On the other hand do contemporary numerical techniques and hardware configurations offer the possibility to analyse the behaviour of such thin composite structures in transient, three-dimensional flows, including full interaction between fluid and structure. It is the aim of this programme to develop such an integrated code, including the development of proper numerical methodologies for the various length and time scales that play a role in this problem. Related to the research theme "Computational Mechanics"

7.4 Active Materials The research of the group in this area is focused on (i) a better understanding of the

underlying physics through atomistic modelling and, from this, the development of better continuum theories and (ii) the numerical simulation of phase transformations and the development of efficient numerical techniques to generate the microstructures.

Related to the research themes “Mechanics of Materials” and “Computational Mechanics”.

7.5 Structural Dynamics The development of analytical procedures for moving loads (railway transport) and the analysis of waves for non-destructive testing.


Related to the research theme "Structural Dynamics and Control".


8.1 Refereed journals Askes, H.; A.S.J. Suiker; L.J. Sluys: A Classification of higher-order strain gradient models - linear analysis; Archive of Applied Mechanics, 72, 171-188, (in co-operation with group Computational Mechanics, Structural Mechanics and Dynamics), 2002. Borst, R. de: Fracture in Quasi-brittle Materials: a Review of Continuum Damage-based Approaches; Engineering Fracture Mechanics 69, 95-112, 2002. Borst, R. de; M.A. Abellan: A numerical framework for continuum damage-discontinuum transition; Archive of applied mechanics, 54, 697-707, 2002. Borst, R. de; O.H. Heeres: A unified approach to the implicit integration of standard, non-standard and viscous plasticity models; International Journal for Numerical and Analytical Methods in Geomechanics, 26, 11, pp 1059-1070, 2002. Gutiérrez, M.A.; H. Askes: Simulation of special loading conditions by means of non-linear constraints imposed through Lagrange multipliers; Communications in Numerical Methods in Engineering, 18, pp 699-709, (in co-operation with group Computational Mechanics, Structural Mechanics and Dynamics), 2002. Heeres, O.M.; A.S.J. Suiker; R. de Borst: A Comparison Between the Perzyna Viscoplastic Model and the Consistency Viscoplastic Model; European Journal of Mechanics A/Solids, 21, 1-12, 2002. Kononov, A.V. ; R. de Borst: Instability Analysis of Vibrations of a Uniformly Moving Mass in One and Two-Dimensional Elastic Systems; European Journal of Mechanics A/Solids, 21, 151-165, 2002. Peerlings, R.H.J.; R. de Borst; W.A.M. Brekelmans; M.G.D. Geers: Localisation issues in local and nonlocal contunuum approaches; European Journal of Mechanics A/Solids, 21, 2, p. 175-191, (in co-operation with group “Materials Technology” (TU/e)), 2002. Turteltaub, S.: Functionally Graded Materials for Prescribed Field Evolution; Computer Methods in Applied Mechanics and Engineering, 191 (21-22), p 2283-2296, 2002. Turteltaub, S.: Optimal control and optimization of functionally graded materials for thermomechanical processes; International Journal of Solids and Structures, 39, 3175-3197, 2002. Wells, G.N.; L.J. Sluys; R. de Borst: A p-adaptive scheme for overcoming volumetric locking during plastic flow; Computer Methods in Applied Mechanics and Engineering, 191, (29-30), p. 3153-3165, (in co-operation with group Computational Mechanics, Structural Mechanics and Dynamics), 2002. Wells, G.N.; R. de Borst; L.J. Sluys: A consistent geometrically non-linear approach for delamination; International Journal for Numerical Methods in Engineering. 54.9. 1333-1357, (in co-operation with group Computational Mechanics, Structural Mechanics and Dynamics), 2002. Wells, G.N.; L.J. Sluys; R. de Borst: Simulating the Propagation of Displacement Discontinuities in a Regularized Strain-softening Medium; International Journal for Numerical Methods in Engineering, 53, 5, 1235-1256, (in co-operation with group Computational Mechanics, Structural Mechanics and Dynamics), 2002.


Borst, R. de: Warner Tjardus Koiter - Het instabiele hanteerbaar; in: Delfts Goud - Leven en werk van 18 markante hoogleraren, p 222-231, Beta Imaginations, isbn 90-75961-2—0, 2002. Borst, R. de; J.H.A. Schipperen: Computational Models for Delamination and Fracture in Composites; in: Continuum Damage Mechanics of Materials and Structures, eds O. Allix and F. Hild, Elsevier, ISBN 0 08 043918 7, p 325-353, 2002.


Gutiérrez, M.A.; R. de Borst: Deterministic and probabilistic material length-scales and their role in size-effect phenomena; Structural Safety and Reliability, eds Corotis et al, published by Swets & Zeitinger, ISBN 90 5809 197 X, 2001.

8.3 Refereed proceedings Abellan, M.A.; R. de Borst: A Novel Numerical Approach to Strain Localisation in Saturated Soils, Plasticity, Damage and Fracture at Macro, Micro and Nano Scales; Proceedings of PLASTICITY '02: the ninth International Symposium on Plasticity and its Current Applications, p. 289-291, 2002. Abellan, M.A.; R. de Borst: A New Numerical Approach to Shear Banding in Saturated Soils; Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: Mang, H.A.; Rammerstorfer, F.G.; Eberhardsteiner, J., Publisher: Vienna University of Technology, Austria, ISBN 3-9501554-0-6, http://wccm.tuwien.ac.at Borst, R. de; H. Askes; M.A. Gutiérrez; G.N. Wells: A Unified Numerical Approach to Plastic Strain Localisation and Discrete Failure Plasticity, Damage and Fracture at Macro, Micro and Nano Scales; eds A.S. Khan, O. Lopes-Pamies Proceedings of PLASTICITY '02: the ninth International Symposium on Plasticity and its Current Applications, p. 561-563, (in co-operation with group Computational Mechanics, Structural Mechanics and Dynamics), 2002. Borst, R. de; H. Askes; M.A. Gutiérrez; J.J.C. Remmers; G.N. Wells: A Précis of Recent Developments in Computational Failure Mechanics; Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: Mang, H.A.; Rammerstorfer, F.G.; Eberhardsteiner, J., Publisher: Vienna University of Technology, Austria, ISBN 3-9501554-0-6, http://wccm.tuwien.ac.at Brummelen, E.H. van; S.J. Hulshoff; R. de Borst: Energy Conservation Under Incompatibility for Fluid Structure Interaction Problems; Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: Mang, H.A.; Rammerstorfer, F.G.; Eberhardsteiner, J., Publisher: Vienna University of Technology, Austria, ISBN 3-9501554-0-6, http://wccm.tuwien.ac.at Bijl, H.; S.J. Hulshoff; A.H. van Zuijlen: Accuracy and efficiency of Fluid-Structure Interaction computations; Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: Mang, H.A.; Rammerstorfer, F.G.; Eberhardsteiner, J., Publisher: Vienna University of Technology, Austria, ISBN 3-9501554-0-6, http://wccm.tuwien.ac.at Gutiérrez, M.A.: Formulation of a path-following constraint with application to Monte Carlo simulations of failure in quasi-brittle solids; 15th ASCE Engineering Mechanics Conference, New York, 6 pages, 2002. Gutiérrez, M.A.; R. de Borst: Computational Analysis of Probabilistic Size Effects in Regularised Continua; Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: Mang, H.A.; Rammerstorfer, F.G.; Eberhardsteiner, J., Publisher: Vienna University of Technology, Austria, ISBN 3-9501554-0-6, http://wccm.tuwien.ac.at Hulshoff, S.J.; H. Bijl; R. de Borst: Wave Propagation in Adaptive Space-Time Computations; Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: Mang, H.A.; Rammerstorfer, F.G.; Eberhardsteiner, J., Publisher: Vienna University of Technology, Austria, ISBN 3-9501554-0-6, http://wccm.tuwien.ac.at Meijers, S.J.H.; J.M.J.M. Bijen; R. de Borst; A.L.A. Fraaij: Modelling of chloride-ion transport in reinforced concrete: prediction of the corrosion initiation time; International Congress Challenges of Concrete Constructions. pp. 91-99, Dundee, 2002. Michler, C.; S.J. Hulshoff; E.H. van Brummelen; R. de Borst: Space-Time Discretizations for Fluid-Structure Interaction; Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: Mang, H.A.; Rammerstorfer, F.G.; Eberhardsteiner, J., Publisher: Vienna University of Technology, Austria, ISBN 3-9501554-0-6, http://wccm.tuwien.ac.at Munts, E.; S.J. Hulshoff; R. de Borst: A Multiscale Method for Linear Convection-Diffusion Using Partitions of Unity; Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: Mang, H.A.; Rammerstorfer, F.G.; Eberhardsteiner, J., Publisher: Vienna University of Technology, Austria, ISBN 3-9501554-0-6, http://wccm.tuwien.ac.at (in co-operation with group Computational Mechanics, Structural Mechanics and Dynamics), 2002. Remmers, J.; R. de Borst; G. Wells: Analysis of Delamination Growth with Discontinous Solid-Like Shell Elements; Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: Mang, H.A.; Rammerstorfer, F.G.; Eberhardsteiner, J., Publisher: Vienna


University of Technology, Austria, ISBN 3-9501554-0-6, http://wccm.tuwien.ac.at, (in co-operation with group Computational Mechanics, Structural Mechanics and Dynamics), 2002. Remmers, J.J.C.; R. de Borst: Delamination Buckling of Fibre-Metal Laminates under Compressive and Shear Loadings; Proceedings of the 43rd AIAA Structures, Structural Dynamics and Materials Conference. American Institute of Aeronautics and Astronautics. 2002. Suiker, A.S.J.; R. de Borst: Numerical Modelling of Railway Track Deterioration; Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: Mang, H.A.; Rammerstorfer, F.G.; Eberhardsteiner, J., Publisher: Vienna University of Technology, Austria, ISBN 3-9501554-0-6, http://wccm.tuwien.ac.at Suiker, A.S.J.; C.S. Chang: Meso-scale continuum model and discrete model for granular materials; Proceedings of the 15th ASCE Engineering Mechanics Conference, New York, 2002. Wells, G.N.; L.J. Sluys; R. de Borst: Computational modelling of cracks in viscoplastic media. K. Ravi-Chandar, B.L. Karihaloo, T. Kishi, R.O. Ritchie, A.T. Yokobori Jr., T. Yokobori (eds.), In: Advances in Fracture Research (ICF 10), Honolulu, USA, CDROM (6 pages), 2001. (In co-operation with group “Engineering Mechanics (1)” (TUD)). Wells, G.N.; R. de Borst; L.J. Sluys: Analysis of cohesive cracks under quasi-static and dynamic loading. In: B.L. Karihaloo (ed.), Analytical and Computational Fracture Mechanics of Non-Homogeneous Materials (IUTAM), Cardiff, U.K., Kluwer Academic Publishers, p.293-302, 2002. (In co-operation with group “Engineering Mechanics (1)” (TUD)). Zuijlen, S. van; H. Bijl; S.J. Hulshoff: Accuracy and Efficiency of Partitioning Algorithms in Fluid-Structure Interaction Computations; Proceedings of the Fifth World Congress on Computational Mechanics (WCCM V), July 7-12, 2002, Vienna, Austria, Editors: Mang, H.A.; Rammerstorfer, F.G.; Eberhardsteiner, J., Publisher: Vienna University of Technology, Austria, ISBN 3-9501554-0-6, http://wccm.tuwien.ac.at


Name: Suiker, A.S.L. Title: The mechanical behaviour of ballasted railway tracks,

TU Delft, June 2002, ISBN 90-407-2307-9. Advisor: Prof.Dr.Ir. C. Esveld and Prof.Dr.Ir. R. de Borst Current position: UD at TUD

10. Membership editorial boards international journals. Prof.Dr.Ir. R. de Borst:

• Editor-in-Chief “International Journal for Numerical and Analytical Methods in • Geomechanics” • Editor-in-Chief "Encyclopedia of Computational Mechanics" • Volume Editor "Numerical and Computational Methods" of "Comprehensive

Structural Integrity" • Associate Editor “International Journal for Numerical Methods in Engineering” • Member Editorial Board “Archive of Applied Mechanics (Ingenieur-Archiv)” • Member Editorial Board “European Journal of Mechanics / A: Solids” • Member Editorial Board “Structural Engineering and Mechanics” • Member Editorial Board “Engineering Computations: An International Journal” • Member Editorial Board “International Journal of Multiscale Computational

Engineering” • Member Editorial Board “Computer Modelling in Engineering & Sciences” • Member Editorial Board "Journal of Computational Methods in Applied Sciences and

Engineering"


• Member Editorial Board "Computer Methods in Applied Mechanics and Engineering" • Member Editorial Board "Communications in Numerical Methods in Engineering"


Prof.Dr.Ir. R. de Borst: • A Unified Approach to Plastic Strain Localisation and Discrete Failure, Ninth

Internatonal Symposium on Plasticity and its Applications, Aruba, 3-9 January, 2002 • Computational Materials Science, European Workshop on Funding of Material

Modeling, Geesthacht, 14-15 March, 2002. • Numerical Aspects of Cohesive Zone Models, International Workshop on

Fundamentals and Applications of Cohesive Models, Hamburg, 10-11 June, 2002 • A Precis of Some Recent Developments in Computational Failure Mechanics, Fifth

World Congress on Computational Mechanics, Vienna, 7-12 July, 2002 • A Numerical Methodology for Continuum-Discontinuum Transition, International

Workshop on Multiscale Computational Mechanics of Materials and Structures, Cachan, 18-20 September, 2002

Ir. J.J.C. Remmers • A Cohesive Segments Approach for Crack Growth, IUTAM Symposium Multi-Scale

Modeling and Characterization of Elastic-Inelastic Behavior of Engineering Materials, Marrakech, 20-25 October, 2002

12. Membership international scientific committees. Prof.Dr.Ir. R. de Borst: • Eighth International Symposium on Numerical Models in Geomechanics, Rome, 10-

12 April, 2002 • International Workshop on Bifurcations and Instabilities in Geomechanics,

Collegeville, Minnesota, 2-5 June, 2002 • Fifth World Congress on Computational Mechanics, Vienna, 7-12 July, 2002 • Second International Conference on Advances in Structural Engineering and

Mechanics, Pusan, 21-23 August, 2002 • Fourth International Conference on New Challenges in Mesomechanics, Aalborg,

26-30 August, 2002 • Sixth International Conference on Computational Structures Technology, Prague, 4-

6 September, 2002 • Sixth European Mechanics and Materials Conference, Liege, 9-12 September, 2002 • International Conference on Structural Integrity and Fracture, Perth, 25-28

September, 2002


Prof.Dr.Ir. R. de Borst • Fellow International Association of Computational Mechanics

Dr.Ir. M.G.A. Tijssens: • NWO-Talent stipendium


14. Overview of research input and output. 14.1 Input “Engineering Mechanics (1)” related to EM, 2002

Sources of financing1 Total 1+b 2 3 number fte Senior academic staff 6 - - 6 3.5 Supporting staff 1 1 - 2 -2

PhD 4 2 - 6 4.83

Postdocs - - 2 2 0.4 Total 11 3 2 16 8.7

1 Sources of financing: 1: University 2: STW, SON, NWO, FOM 3: Industry, TNO, Brite-Euram, Nuffic, Min. Econ. Affairs, NIMR, DPI etc. 2 No research input involved for supporting staff. 3 Research input per PhD per year: 0.8 fte

14.2 Output “Engineering Mechanics (1)” related to EM, 2002

Total Scientific publications: refereed journals 7+6* Scientific publications: books, chapters in book 3 Scientific publications: refereed proceedings 14+5* PhD theses 1



Project Title: Multiscale Methods in Computational Mechanics Participating Groups: Engineering Mechanics (1) (TUD)

Structural Optimization and Computational Mechanics (TUD)

Materials Technology (TU/e) Participants: Prof.Dr.Ir. R. de Borst (TUD), Prof.Dr.Ir. F. van Keulen

(TUD), Dr.Ir. J.M.R.J. Huyghe (TU/e)


6. RESEARCH DOCUMENTATION OF THE GROUP AEROSPACE STRUCTURES AND COMPUTATIONAL MECHANICS


Delft University of Technology Department of Aerospace Engineering

2. Subprogrammes related to research school EM. 2.1 Structural Design and Optimization 2.2 Stability and Collapse of Imperfect Composite Shells 2.3 Development of Nonlinear Solution Procedures

3. Group director.

Ir. T.J. van Baten (interim groupleader)


Arbocz, Prof.Dr. J. Professor Emeritus 0.3 Hol, Ir. J.M.A.M. UD 0.1 Jansen, Dr.Ir. E.L. UD 0.6 Rothwell, Prof.Dr. A. Professor Emeritus 0.1 Vries, Ir. J. de UD 0.3 Total fte: 1.4


5.1 Structural Design and Optimization

Georgiev, M.Sc. I. (PhD b) Micromechanics-based simulation of crack growth in pressurized fuselages

StMe

Vervenne, Ir. K. (PhD b) ADOPT - Sequential Approximate Design Optimization

StMe

Visser, Ir. J.A.P. de (PhD b) Optimization of dynamic behavior of aircraft structures

StMe

5.2 Stability and Collapse of Imperfect Composite Shells

Stam, Ir. A.R. (PhD b) Reliability based design procedures for buckling critical structures

StMe/CoMe

Tiso, P. M.Sc. Ae (PhD b) Non linear Dynamic Buckling of Shells StMe



Goldfeld, Dr. Y; Israel

Buckling of composite shells with variable thickness and fiber density, November 2002 – October 2004

2.2 StMe

7. Short description of subprogrammes related to research school EM. 7.1 Structural Design and Optimization

New demands of structural integrity, durability, low weight and minimum cost pose an unprecedented challenge to the structural designer. New materials may assist in satisfying some of these demands, but at the same time give rise to significant new problems for the designer. Furthermore the design of the structure can no longer be seen as an isolated activity, but must play its part in a multi-disciplinary approach to the design of the aircraft or spacecraft as a whole. The traditional approach to design is no longer adequate unless it can be supplemented by a numerical, computer-based approach in which the trade-off between conflicting design requirements can be quantified, and many more alternatives evaluated. Optimization plays an important role here, by providing a tool to identify the active design constraints and to steer the design towards some required goal such as minimum weight or cost - a process sometimes termed “structural synthesis” and sometimes “computer-aided design”. Related to the research theme “Structural Mechanics”.

7.2 Stability and Collapse of Imperfect Composite Shells In modern designs, which are often obtained by use of one of the structural optimization codes and which may be of new high strength materials (read advanced composites), it frequently happens that stability behavior dictates the choice of some of the critical dimensions of the structure. This implies the need to investigate the different loading cases quite accurately by carrying out extensive numerical calculation and/or experimental verification. The central goal of the shell research being carried out is the development of “Improved Shell Design Criteria”, incorporating all the theoretical knowledge accumulated in the last, say, 25 years through intensive research in the aerospace, the nuclear and the offshore field, and making efficient use of the currently available interactive and (super-) computing facilities. It has been demonstrated in the past that reliable buckling loads predictions for imperfection sensitive structures depend mainly on the availability of a sufficiently detailed statistical sample of the expected initial imperfections and on the appropriate choice of the nonlinear model used for the buckling load calculations. The latter, in turn, requires considerable knowledge by the user of the physical behavior of imperfect shell structures. Related to the research themes “Computational Mechanics” and “Structural Mechanics”.

7.3 Development of Nonlinear Solution Procedures Nonlinear solution procedures can be divided into two general groups, i.e. global methods such as path-following, transient integration procedures on the one hand and local approximation methods such as bifurcation buckling analysis and singular perturbation methods on the other. At present, these individual methods are mostly used independently of each other even when they are part of the same finite element code. However, the power of a finite element code can be increased considerably if these methods can be integrated so that they can be used in support of each other. For


example, the practical solution of mode jumping problems can be carried out by a combined use of a local approximation technique: Bifurcation Buckling Analysis (with linear or nonlinear prebuckling), and two global techniques: Static Path-following and Transient Analysis whereby the data produced by each separate program module is used to initiate the workings of the next. In order to achieve such high degree of integration it is necessary to redesign the global structure of the code (B2000) in which these solution procedures reside. Related to the research themes “Computational Mechanics” and “Structural Mechanics”.

8. Refereed scientific publications related to research school EM. 8.1 Refereed journals

Arbocz, J., J.H. Starnes: Future directions and challenges in shell stability analysis; Thin Walled Structures Vol. 40 pp 729-754, 2002. Arbocz, J., J.M.A.M Hol., J. de Vries: The effect of Initial Imperfections on Shell Stability; – Modern Problems of Structural Stability Part IV, pp 117-228) Alexander P. Syranian & Isaac Elishakoff (Ed.) Udine, Italy: Springer Verlag Wien-New York, 2002. Boer, H. de, F. van Keulen, K. Vervenne: Refined second order semi-analytical design sensitivities; International Journal for numerical methods in engineering pp 1033-1051, (in co-operation with group “Structural Optimization and Computational Mechanics” (TUD)), 2002.

Jansen, E.L.: Non-stationary flexural vibration behavior of a cylindrical shell; International journal of non-linear mechanics, pp 937-951, 2002.


-----


Gurav, S., K. Vervenne, H.J. Damveld, F. van Keulen: Bounded but unknown uncertainties in design optimization by combining the multipoint approximation method and design sensitivities; 43rd Structures, Structural Dynamics and Materials Conference. Proceedings in AIAA journal pp. 1-10 Reston Virginia. AIAA, (in co-operation with group “Structural Optimization and Computational Mechanics” (TUD)), 2002. Jansen, E.L.: Stability and Dynamics of cylindrical shells via a simplified analysis; CNES proceedings of European Conference on Spacecraft Structures, Materials and Mechanical Testing, Toulouse, France CNES Vervenne, K., F. van Keulen: An alternative approach to response surface building using gradient information; 43rd Structures, Structural Dynamics and Materials Conference. Proceedings in AIAA journal pp. 1-10 Reston Virginia. AIAA, (in co-operation with group “Structural Optimization and Computational Mechanics” (TUD)), 2002. Vervenne, K., F. van Keulen: Gradient-Enhanced response surface building; 43rd Structures, Structural Dynamics and Materials Conference. Proceedings in AIAA journal pp. 1-14 Reston Virginia. AIAA, (in co-operation with group “Structural Optimization and Computational Mechanics” (TUD)), 2002. Vries, J. de: Imperfection Database; Proceedings of 3rd European Conference on Launcher Technology Strasbourg, pp323-332 CNES


-----



-----


-----

12. Membership international scientific committees. -----


-----

14. Overview of research input and output. 14.1 Input “Aerospace Structures and Computational Mechanics” related to EM, 2002

Sources of financing1 Total 1+b 2 3 number fte Senior academic staff 5 - - 5 1.4 Supporting staff - - - - - PhD 5 - - 5 4.02

Postdocs 1 - - 1 0.13

Total 11 - - 11 5.5

1 Sources of financing: 1: University 2: STW, SON, NWO, Fom 3: Industry, TNO, Brite-Euram, Nuffic, Min. Econ. Affairs, NIMR, DPI etc. 2 Research input for PhD per year: 0.8 fte 3 Started in November 2002

14.2 Output “Aerospace Structures and Computational Mechanics” related to EM, 2002

Total Scientific publications: refereed journals 3+1* Scientific publications: books, chapters in book - Scientific publications: refereed proceedings 2+3* PhD theses - * In co-operation with other EM-groups





Ir. J.H. Jacobs (TU/e), Prof.Dr.Ir. F. van Keulen (TUD), Dr. J.J.M. Rijpkema (TU/e), Ir. R.A. van Rooij (TU/e), Dr.Ir. A.J.G. Schoofs (TU/e), Ir. K. Vervenne (TUD).



7. RESEARCH DOCUMENTATION OF THE STRUCTURAL OPTIMIZATION AND COMPUTATIONAL MECHANICS GROUP

1. University/Department. Delft University of Technology Department of Design, Engineering and Production Subfaculty of Mechanical Engineering and Marine Technology

2. Subprogrammes related to research school EM. 2.1 Structural Optimization and Computational Mechanics

3. Group director. Prof.Dr.Ir. F. van Keulen


Booij, M.Sc. J. UD 0.4 Goosen, Dr.Ir. J.F.L. Linden, Dr.Ir. J.C. van der

UD UD

0.2 0.1

Keulen, Prof.Dr.Ir. F. van Full Professor 0.4 Total fte: 1.1

5. PhD-projects related to research school EM per December 2002: name, source of financing, project title and research theme EM

Andreykiv, Ir. A. (PhD 1) Development of improved

endoprostheses for the upper extremities

StMe

Gurav, Ir. S.P.

(PhD 2)

Sequential Approximate Design Optimization including Uncertainties, Discontinuities and Discrete Design Variables

CoMe

Langelaar, Ir. M. (PhD 1) Development and design of Micro-Electrical Mechanical Systems

StMe

Poort, Ir. G. (PhD 1) Development of improved endoprostheses for the upper extremities

StMe

Ruiter, Ir. M.J. de

(PhD 1)

Topology optimization on the basis of continuous design variables

CoMe

Weustink, Ir. A.P.D.

(PhD 3)

Impregnation and winding using thermoplastic materials

StMe



Fatemi, Dr. J.; NL

Development of improved endoprostheses for the upper extremities, 2000-2004

StMe


7.1 Structural Optimization and Computational Mechanics Analytical modelling is only possible for a very limited number of structures or parts of structures. With the development of high-performance computer facilities, however, an increasing number of mechanical problems can be modelled and analysed numerically. The finite element method is the method that is often made use of in these cases. Analysis on the basis of numerical techniques is complicated by nonlinearities, caused by material behaviour, geometric effects, contact and/or friction. Moreover, multidisciplinary interaction may be important. This is especially the case for Micro-Electrical-Mechanical Systems (MEMS) and biomedical applications. Because of these aspects, the analysis of practical problems takes a tremendous effort. Therefore, further development of efficient, multidisciplinary numerical modelling techniques is required. These techniques should be tailored for high-performance computer architectures. The aim is to develop such techniques using approaches that strengthen and exploit the fundamentals of engineering mechanics. Once numerical techniques are incorporated in a design process, for which often many intermediate designs and corresponding design sensitivities must be evaluated, the efficiency requirements are even more demanding. This holds for a design process in which intermediate designs are evaluated "manually", but becomes more important for (partially) automated optimization processes. Improvement of structural optimization techniques cannot be achieved independently from new developments in Computational Mechanics. Only a close integration of structural optimization techniques and numerical analysis strategies can yield the most efficient design tools. Within this theme, the fundamentals for modelling, analysis, design sensitivities and optimization of structures will be developed. The focus will be on the multidisciplinary links between these aspects. Furthermore, new developments will be made available for day-to-day practice. For this purpose we are collaborating with more application-oriented groups and companies. Related to the research themes “Computational Mechanics”, “Mechanics of Materials” and “Structural Mechanics”.


Boer, H. de, F. van Keulen, K. Vervenne: Refined second order semi-analytical design sensitivities; In: International Journal for Numerical Methods in Engineering 2002, 55: 1033-1051 (in co-operation with group “Aerospace Structures and Computational Mechanics” (TUD)).

Fatemi, J., F. van Keulen, P.R. Onck: Generalized Continuum Theories: Application to Stress Analysis in Bone; In: Meccanica 37: 385-396, 2002.

Goosen, J.F.L.: Design considerations for silicon sensors for use in catheters and guide wires; In: Smart Materials and Structures 11, 804-812, 2002. Hofstee, J., H. de Boer, F. van Keulen: Elastic stiffness analysis of a thermo-formed plain-weave fabric composite - part III: experimental verification; In: Composites Science and Technology 62, 401-418, 2002.


Prendergast, P.J.: Mechanics Applied to Skeletal Ontogeny and Phylogeny; In: Meccanica 37: 317-334, 2002.


----- 8.3 Refereed proceedings

Andreykiv, A., P.J. Prendergast, F. van Keulen, W. Swieszkowski: Bone Ingrowth Simulation of a Glenoid Component with Porous Tantalum Backing; In: Proceedings ISG 2002, The 4th Meeting of the International Shoulder Group, Cleveland, Ohio, USA, June 17-18, 2002, Eds. B. Kirsch, C. Walker, B. Memberg, pp 56-59.

Fatemi, J., F. van Keulen: Finite Element Analysis of Bone Structures Based on Micropolar Continuum Theory; In: Proceedings WCCM V, 5th World Congress on Computational Mechanics, 7-12 July 2002, Vienna, Austria. ISBN 3-9501554-0-6, Eds. H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner, 10 pp.

Fatemi, J. P.R. Onck, G. Poort, F. van Keulen: Cosserat Moduli of Anisotropic Cancellous Bone: A Micromechanical Analysis; In: EUROMECH-MECAMAT Proceedings of the 6th European Mechanics of Materials Conference, EMMC6 on Nonlinear Mechanics of Anisotropic Materials, September 9-12, 2002, Liège, Belgium, Ed. S. Cescotto, ISBN 2-87047-028-2, pp 211-218.

Fatemi, J., P. Trompette: Optimal Design of Stiffened Plate Structures; In: Proceedings 43rd Structures, Structural Dynamics, and Materials Conference and Exhibit, 22-25 April 2002, Denver, CO, USA. AIAA 2002-1672, ISBN 1-56347-533-2, 9 pp.

Gurav, S., K. Vervenne, H. Damveld, F. van Keulen: Bounded-but-Unknown Uncertainties in Design Optimization by combining the Multipoint Approximation Method and Design Sensitivities; In: Proceedings 43rd Structures, Structural Dynamics, and Materials Conference and Exhibit, 22-25 April 2002, Denver, CO, USA. AIAA 2002-1759, ISBN 1-56347-533-2, 13 pp. (in co-operation with group “Aerospace Structures and Computational Mechanics” (TUD)).

Jacobs, J.H., L.F.P. Etman, J.E. Rooda, F. van Keulen: An Object-Oriented Framework for Sequential Approximate Optimization; In: Proceedings 9th AIAA/ISSMO Symposium and Exhibit on Multidisciplinary Analysis and Optimization, 4–6 Sep 2002, Atlanta, Georgia, USA, AIAA–2002–5635, 10 pp. (in co-operation with group “Systems, Dynamics and Control” (TU/e)).

Keulen, F. van, H. de Boer: Design Perturbation of a Finite Rotation Shell Element; In: Proceedings 43rd Structures, Structural Dynamics, and Materials Conference and Exhibit, 22-25 April 2002, Denver, CO, USA. AIAA 2002-1671, ISBN 1-56347-533-2, 9 pp.

Keulen, F. van K. Vervenne: Gradient-Enhanced Response Surface Building; In: Proceedings 9th AIAA/ISSMO Symposium and Exhibit on Multidisciplinary Analysis and Optimization, 4–6 Sep 2002, Atlanta, Georgia, USA, AIAA–2002–5455, 14 pp. (in co-operation with group “Aerospace Structures and Computational Mechanics” (TUD)).

Oosterom, R., F. van Keulen, P.M. Rozing: Design Considerations of the Glenohumeral Prosthesis; In: Proceedings of the Third Conference of the International Shoulder Group, Newcastle-upon-Tyne, 4-6 September 2000, Eds. E.K.J. Chadwick, H.E.J. Veeger, F.C.T. van der Helm, J. Nagels, ISBN 90-407-2268-4. (not mentioned in AR 2000 and 2001).

Ruiter, M.J. de, F. van Keulen: The Topological Derivative in the Topology Description Function Approach; In: Proceedings 4th ASMO-UK/ISSMO Conference on Engineering Design Optimization, Product and Process Improvement, 4-5 July 2002, Newcastle-upon-Tyne, UK. ISBN 0-7017-0138-2, Ed. P. Gosling, pp 160-167.

Vervenne, K., F. van Keulen: An Alternative Approach to Response Surface Building Using Gradient Information;In: Proceedings 43rd Structures, Structural Dynamics, and Materials Conference and Exhibit, 22-25 April 2002, Denver, CO, USA. AIAA 2002-1584, ISBN 1-56347-533-2, 10 pp. (in co-operation with group “Aerospace Structures and Computational Mechanics” (TUD)).

Weustink, A.P.D., F. van Keulen, R. Marissen: Virtual Prototyping of an Impregnation Device with Convex Rolls; In: Proceedings Tenth European Converence on Composite Materials, ECCM-10, June 3-7, 2002,


Brugge, Belgium, 10 pp, CD-ROM, Eds. H. Sol, J. Degrieck (in co-operation with group “Engineering Mechanics (2)” (TUD)).

9. Dissertations related to research school EM: name, title, university, date and supervisors.

Name: Hofstee, J.W. Title: Kinematics and stiffness of thermoformed plain-weave laminates.

Simple models and experimental validation. Delft University of Technology, December 2002. Advisor: Prof.Dr.Ir. A. van Keulen Current position: Senior researcher at EADS Airbus, Hamburg, Germany.


Prof.Dr.Ir. A. van Keulen: • Book review editor for Structural and Multidisciplinary Optimization

11. Keynote lectures and seminars. Prof.Dr.Ir. A. van Keulen: • Third AIAA/ISSMO Internet Conference on Approximations Optimization, October

14-18, 2002. Organizers: R.T. Haftka and F. van Keulen.

12. Membership International Scientific Committees. Prof.Dr.Ir. A. van Keulen: • Scientific Committee of Euromech 442, Colloquium on Computer-Aided Optimization

of Mechanical Systems, February 23-27, 2003. • Scientific Committee WCSMO-5, May 19-23, 2003.


Werkwijze voor het vervaardigen van een product onder gebruikmaking van een doorn. Dutch patent application, no.1022244 in the name of Delft University of Technology. Applicants: Prof.dr.ir. A. van Keulen, Ir. A.P.D. Weustink.


14. Overview of research input and output. 14.1 Input “Structural Optimization and Computational Mechanics” related to EM, 2002

Sources of financing1 Total 1 2 3 number fte Senior academic staff 4 - - 4 1.1 Supporting staff - - - - - PhD 4 1 1 1 4.82

Postdocs 1 - - 1 0.8 Total 9 1 1 11 6.7

1 Sources of financing: 1: University 2: STW, SON, NWO, FOM 3: Industry, TNO, Brite-Euram, Nuffic, Min. Econ. Affairs, NIMR, DPI etc. 2 Research input per PhD per year: 0.8 fte

14.2 Output “Structural Optimization and Computational Mechanics” related to EM, 2002

Total Scientific publications: refereed journals 4+1* Scientific publications: books, chapters in book - Scientific publications: refereed proceedings 7+5* PhD theses 1

* In co-operation with other EM-groups




Ir. J.H. Jacobs (TU/e), Prof.Dr.Ir. A. van Keulen (TUD), Dr. J.J.M. Rijpkema (TU/e), Ir. R.A. van Rooij (TU/e), Dr.Ir. A.J.G. Schoofs (TU/e), Ir. K. Vervenne (TUD).

Research Input in fte: 2.4 Project Title: Multiscale Methods in Computational Mechanics Participating Groups: Engineering Mechanics (1) (TUD) Structural Optimization and Computational Mechanics (TUD) Materials Technology (TU/e)

Participants: Prof.Dr.Ir. R. de Borst (TUD), Prof.Dr.Ir. F. van Keulen (TUD), Dr.Ir. J.M.R.J. Huyghe (TU/e)


8. RESEARCH DOCUMENTATION OF THE GROUP ENGINEERING MECHANICS (2)

1. University/Department. Delft University of Technology Faculty of Design, Engineering and Production Subfaculty of Mechanical Engineering and Marine Technology

Department of Mechanics and Control

2. Subprogrammes related to research school EM. 2.1 Mechanics of Materials 2.2 Dynamic Behaviour of Mechanical Systems

3. Group director. Prof.Dr.Ir. L.J. Ernst


Ernst, Prof.Dr.Ir. L.J. Full Professor 0.6 Jansen, Dr.Ir. K.M.B. UHD 0.2 Marissen, Prof.Dr.Ir. R. Part-time Professor, main position at DSM

Research 0.1

Nijhof, Ir. A.H.J. UHD 0.1 Rixen, Prof.Dr.Ir. D.J. Full Professor 0.6 Schwab, Dr.Ir. A.L. UD 0.2Woerkom, Dr.Ir. P.Th.L.M. van UHD 0.8 Total fte: 2.6

5. PhD-projects related to research school EM per December 2002: name, source of financing, project title and research theme EM

5.1 Mechanics of Materials

Gonda, M.Sc. V. (PhD 3) Virtual Prototyping of Electronic Components- Thermo-mechanical characterisation and modelling of thin film polymers

MeMa

Hof, Ir. C. van 't (PhD 1/3) Process dependent packaging polymer characterization: development of a constitutive model

MeMa

Leenders, Ir. W.S. (PhD 1) Usage of glass fiber reinforced plastics in load carrying structures in conventional ships

MeMa


Liu, M.Sc. C.J. (PhD 1/3) Fracture strength of fibre reinforced polymer composites with a geometrical notch: micromechanics and cracking mechanisms

MeMa

Yang, Ir. D. (PhD 1/3) Process dependent packaging polymer characterization: study of (micro-) damage, initiated during the curing process

MeMa

5.2 Dynamic Behaviour of Mechanical Systems

Mohanty, P. (PhD 1) Experimental Identification of Non-Linear Dynamical Systems

StDy

Conza, Ir. N. (PhD 2) Doppler Imaging of Vibration System for detection of musculoskeletal disorders

StDy


Lin, Dr. Ir. Qirong; China

Optimal vibration suppression using piezo-patches with state-switching, Nov.2002-Nov.2003

2.2 StDy

He Yuting; China Virtual Prototyping of Electronics Components, April 2002 – April 2003

2.1 MeMa

7. Short description of subprogrammes related to research school EM. 7.1. Mechanics of Materials

Demands on functionality and reliability of mechanical products, processes and systems and the needs for continuing improvement of product and process quality are of major concern for the worldwide industry. Traditional experience based design approaches, i.e. trial & error methods (designing, production and testing of a multiplicity of prototypes) can no longer be considered as competitive. Therefore, there is an urgent need to develop innovative design methods. As one of the promising alternatives for the traditional design method, virtual (= simulation-based) prototyping is beginning to draw attention from both industries and the academic world. Adequate virtual prototyping involves a variety of aspects such as mathematical modeling, numerical simulation, functionality and reliability judgement, appropriate optimization tools and adequate experimental verification techniques. Presently, various modeling, simulation and optimization abilities have become available through continuing research and developments in physics, mathematics and engineering. Extension and improvement of these abilities and understanding of the underlying physics have been subject of research and development of many Engineering Mechanics programs. By virtue of the continuing developments in microelectronics and consequently continuing improvement of computational capabilities, an increasing number of mechanical problems can now be modeled and analyzed numerically. Therefore application of virtual prototyping is becoming an increasingly realistic possibility for future design of mechanical products, processes and systems. One of the important building blocks in the process of virtual prototyping concerns "reliable and efficient (mostly FEM-based) mechanical modeling". Within this building block some bottlenecks (or challenges) are presently remaining, while new ones are emerging, despite the tremendous research effort worldwide. Those bottlenecks are mainly driven by the increasing demands on product complexity (application of new


complex materials, continuing miniaturization, function integration), reliability and short-time-to-market demands. Examples of identified bottlenecks are: • Characterization and modeling methodologies for process- and geometric dependent

material properties for various materials. • Damage (and damage evolution) modeling (models & criteria) for various materials. • Reliable experimental techniques for (material-) model parameter identification. • Reliable experimental methods for FEM-model verification. The orientation of the recent (and near future) “Mechanics of Materials” research projects is mainly directed to the elimination of the above bottlenecks and thus to improvement of the “virtual prototyping” chain. The necessary research requires combined experimental and numerical mechanics methods. The understanding and subsequent modeling of materials behavior requires the study and description of physical phenomena, ranging from macro- to micro scales. Two areas of industrial interest and application have been chosen as carriers for the present and future research projects: “Fiber reinforced plastics and flexible fiber systems” and “Micro electronic components and mechanical systems”. Related to the research themes “Mechanics of Materials” and “Structural Mechanics”.

7.2. Dynamic Behaviour of Mechanical Systems

Tremendous advances have been achieved during the last two decades in the field of mechanical engineering thanks to innovation in materials, production techniques and analysis tools. New designs are better optimized leading to better designs. In that context, predicting and controlling the dynamical behavior of systems has become more important than ever before. Structures have become lighter and therefore more flexible. Thus predicting their dynamic performance with accuracy is crucial (e.g. response of constructions to surrounding perturbations, positioning of flexible manipulators, dynamic load analysis on machines,..). Also the advent of new materials such as piezoelectric ceramics and the development of novel mechanical structures such as Micro-Electro-Mechanical systems (MEMS) require modern dynamic analysis to take into account the coupling between different physical fields, treated separately in earlier days. Tackling multi-physical problems and analyzing fully coupled systems (thermal, acoustic, electric, fluid and structural for instance) is one of the essential challenges underlying the development of new analysis tools and innovative design approaches in mechanical dynamics. The objective of the research work in the Engineering Dynamics group is on one hand to develop numerical tools that allow analysis of complex systems, and on the other hand to improve the understanding of dynamical behavior (e.g. vibration analysis and measurement, stability prediction). The research is centered on the development of novel numerical methods and advanced algorithms for efficient computing and testing. Specifically, the section has a strong background in multi-body dynamics, in vibration analysis, substructuring methods, parallel algorithms, and in non-linear stability and bifurcation studies. Related to the research themes “Computational Mechanics” and “Structural Dynamics and Control”.


Adraensens, P.; L. Storme; R. Carleer; J. D'Haen; J. Gelan; V.M. Litvinov; R. Marissen; J. Crevecoeur: NMR Imaging Study of Stress-Induced Material Response in Rubber Modified Polyamide 6; Macromolecules, Vol. 35, 2002 pp 135-140. Ernst, L.J.; C. van 't Hof; D.J. Yang; M.S. Kiasat; G.Q. Zhang; J.L. Bressers; J.F.J. Caers; A.W.J. den Boer; J. Janssen: Mechanical modeling and characterization of the curing process of underfill materials; J. Electronic Packaging, Vol. 124, Num. 2, 2002 pp 97-105.


Liu, C.J.; J.C. Sterk; A.H.J. Nijhof; R. Marissen: Matrix-Dominated Damage in Notched Cross-Ply Composite Laminates: Experimental Observations; Applied Composite Materials, Vol. 9, 2002 pp 155-167. Luke, M.; R. Marissen; H. Nowack: Influence of Scale Effects on the Tensile Strenght of Notched CFRP-Laminates; Exp. Tech. Design Comp. Mat., Vol. 4, 2002 pp 151-156.

Rixen, D.J.: Extended preconditioners for the FETI method applied to constained problems; Int. Journal for Numerical methods in engineering, Vol. 54, 2002 pp 1-26. Schwab, A.L.; J.P. Meijaard: A comparison of revolute joint clearance models in the dynamic analysis of rigid and elastic mechanical systems; Mechanism and Machine Theory, Vol. 37, 2002, pp. 895-913. Schwab, A.L.; J.P. Meijaard: Small vibrations superimposed on a prescribed rigid body motion; Multibody System Dynamics, Vol.9, Num. 10, 2002, pp. 29-49.


Ernst, L.J.; G.Q. Zhang; R. Dudek; O. de Saint Leger: Benefiting from Thermal and Mechanical Simulation in (Micro)-Electronics, Paris, 2002, 376 p., IEEE-CPMT Pub., ISBN 0-7803-9819-x Gonda, V.; C.J. Liu; C. van 't Hof; L.J. Ernst; G.Q. Zhang: Improvement of Material Characterization of Curing Polymers bij Image Processing; in Modeling of Materials and its Applications in Advanced Technologies, pp.205-210, Ed. by C.-H. Chiu, Z. Chen, H. Gao, K.Y Lam and A.A.O. Tay, Trans Tech Publ., Switzerland, 2002.


Brouwer, H.R; J. Linsen; R. Marissen: An ineffective length model for the notched strength of thermoplastic woven fabric composites; Proc. Tenth European Conference on Composite Materials ECCM-10, Brugge, Belgium, 2-7 June, 2002, Ed. by H. Sol and J. Degrieck (CD-rom). Driel, W.D. van;. G.Q. Zhang; J. Janssen; L.J. Ernst; F. Su; S. Yi: Prediction and verification of process-induced thermal deformation of electronic packages using non-linear FEM and 3D interferometry; Proc. Benefiting from Thermal and Mechanical Simulation in (micro)-electronics, Paris, France, 25-27 April, 2002, Ed. by L.J. Ernst et al., IEEE-CPMT Publ. 2002, pp. 362-368.

Ernst, L.J.; D.G. Yang; K.M.B. Jansen; C. van 't Hof; G.Q. Zhang; W.D. van Driel: On the effect of Cure-Residual Stress on Flip Chip Failure Prediction; Proc. 4th Electronic Packaging Technology Conference EPTC2002, Singapore, 10-12 December, 2002, Ed. by C. Lee, K.C. Toh and M. Kiyer, IEEE Publ., 2002, pp. 398-403. He, Y.T.; G.Q. Zhang; L.J. Ernst: The effect of interface models on the interface stresses between a thin oxide layer and a substrate; Proc. Benefiting from Thermal and Mechanical Simulation in (micro)-electronics, Paris, France, 25-27 April, 2002, Ed. by L.J. Ernst et al., IEEE-CPMT Publ. 2002, pp. 213-219.

Kuipers, N.B.; C.C. Riemslag; R.F.M. Lange; M. Janssen; R. Marissen; A. Bakker: Influence of pre-expositon and pre-loading on the environmental stress chacking of a PBT-PBA copoly(ester ester); Proc. 14th European Conference on Fracture Mechanics beyond 2000, Cracow, Poland, 8-13 September, 2002, Ed. by M.S. Found, Swets & Zeitlinger Publ. Leenders, W.S.; R. Marissen: Application of fibre reinforces plastics (FRP) in large removable bulkhead on board of a ship; Proc. Tenth European Conference on Composite Materials ECCM-10, Brugge, Belgium, 2-7 June, 2002, Ed. by H. Sol and J. Degrieck (CD-rom).

Liu, C.J.; A.H.J. Nijhof; L.J. Ernst; R. Marissen: Progressive failure modelling of matrix cracking in notched cross-Ply laminates; Proc. Tenth European Conference on Composite Materials ECCM-10, Brugge, Belgium, 2-7 June, 2002, Ed. by H. Sol and J. Degrieck (CD-rom).

Marissen, R.: Two main challenges for the future composites technology, cost reduction and strength prediction; Proc. Tenth European Conference on Composite Materials ECCM-10, Brugge, Belgium, 2-7 June, 2002, Ed. by H. Sol and J. Degrieck (CD-rom).

Mohanty, P.; D.J. Rixen: Measuring Sweet Spots of Tennis Rackets, Proc. International Modal Analysis Conference, IMAC XX, Los Angeles, U.S.A., 4-8 February, 2002, Ed. by SEM, Publ. 2002, pp 1539-1545.


Mohanty, P.; D.J. Rixen: Operational Model analysis in the presence of harmonic excitation; Proc. 47th congress of the Indian society of theoretical and applied mechanics, Guwahati, India, 23-26 December, 2002, Ed. by D.K. Tripathy, Indian Institue of Tech. Kharagpur Publ., pp. 260-267. Pelletier, C.; H.J.L. Bressers; G.Q. Zhang; K.M.B. Jansen; V. Gonda; L.J. Ernst: The state of the art of thermo-mechanical characterisation of thin polymer films; Proc. Benefiting from Thermal and Mechanical Simulation in (micro)-electronics, Paris, France, 25-27 April, 2002, Ed. by L.J. Ernst et al., IEEE-CPMT Publ. 2002, pp. 293-300. Rixen, D.J.: Force modes for reducing the interface between substructures, Proc. International Modal Analysis Conference, IMAC XX, Los Angeles, U.S.A., 4-8 February, 2002, Ed. by SEM, Publ. 2002, pp 1495-1501. Rixen, D.J.: Component Mode Synthesis Using Free Modes: The True Duality with Craig-Bampton; Proc. Second International Conference on Advanced Computational Methods in Engineering, Liège, Belgium, 28-31 May, 2002, Ed. by M. Hogge et al. (CD-rom) Rixen, D.J.: High Order Static Correction Mode for Component Mode Synthesis, WCCM – Fifth World Congress on Computational Mechanics; Ed. by H.A. Mang, F.G. Rammerstorfer and J. Ebenhandsteiner (CD-rom and http:// wccm.tuwien.ac.at).

Rixen, D.J.: A lanczos procedure for efficient mode superpositions in dynamic analysis; 43st AIAA/ASME/ASCE/AHS Structures, Structural Dynamics, and Materials Conference and Exhibit, Denver, U.S.A., 22-25 April, 2002, Ed. by AIAA, AIAA Publ. 2002, tech. pap. AIAA-2002-1393. Schwab, A.L.; J.P. Meijaard: How to linearize your non-holonomic multibody systems; Proc. Virtual Nonlinear Multibody Systems; Prague, Czech Republic, 23 June- 3 July, 2002, Ed. W. Schielen and M. Valasek, NATO Adv. Study Inst. Publ., pp. 220-227.

Schwab, A.L.; J.P. Meijaard: Two special finite elements for modelling rolling contact in a multbody environment, Proc. First Asian Conference on Multibody Dynamics, Iwaki, Japan, 31 July- 2 August, 2002, Ed. JSME, JSME Publ. (CD-rom).

van Silfhout, R.B.R. ; W.D. van Driel; Y. Li; G.Q. Zhang; L.J. Ernst: Prediction of back-end process-induced wafer warpage and experimental verification; Proc. 52st Electronic Components & Technology Conference, San Diego, 29 May, 2002, Ed. by IEEE, IEEE Publ. 2002, pp. 1182-1187.

Weustink, T.; F. van Keulen; R. Marissen: Virtual prototyping of an impregnation device with convex rolls; Proc. Tenth European Conference on Composite Materials ECCM-10, Brugge, Belgium, 2-7 June, 2002, Ed. by H. Sol and J. Degrieck (CD-rom) (in co-operation with group Structural Optimization and Computational Mechanics). Yang, D.G.; J.Q. Zhang; W. van Driel; J. Janssen; H.J.L. Bressers; L.J. Ernst: Parameter Sensitivity Study of Cure-Dependent Underfill Properties on Flip Chip Failures; Proc. 52st Electronic Components & Technology Conference, San Diego, 29 May, 2002, Ed. by IEEE, IEEE Publ. 2002, pp. 865-872. Zhao, X.J.; G.Q. Zhang; J.F.J.M. Caers; L.J. Ernst: Solders fatique prediction using interfacial boundery volume criterion; Proc. Benefiting from Thermal and Mechanical Simulation in (micro)-electronics, Paris, France, 25-27 April, 2002, Ed. by L.J. Ernst et al., IEEE-CPMT Publ. 2002, pp. 140-147.


Name: Ostayen, R.A.J. van Title: The Hydro-Support: An Elasto-Hydrostatic Thrust Bearing with Mixed

Lubrication Delft University of Technology, December 2002. Advisor: Prof.Dr.Ir. D. Rixen Current position: Assistant professor in the department of Mechanics and Control, T.U.

Delft.


Name: Schwab A. L. Title: Dynamics of Flexible Multibody Systems, small vibrations

superimposed om a general rigid body motion Delft University of Technology, April 2002. Advisor: Prof.Dr.Ir. P. Meijers Current position: Assistant professor in the department of Mechanics and Control, T.U.

Delft.


Prof.Dr.Ir. L.J. Ernst • Guest Editor of a special issue of Journal of Electronic Packaging Prof.Dr.Ir. R. Marissen: • Member Editorial Board of Composite Materials and Structures


Prof.Dr.Ir. D.J. Rixen: • Invited seminar at the DISC (Dutch Institute of Systems and Control) Summer School

on Modeling and Control of Mechanical Systems (July 2002): Linear dynamics simulation and testing.

12. Membership international scientific committees. Prof.Dr.Ir. L.J. Ernst: • Member of the Technical Committee of the 52th Electronic Components & Technology

Conference – Sub-committee on “Modeling & Simulation”, co-chairman of “Design of Simulations and System Reliabiliy”

• Member of the Technical Committee of the 53th Electronic Components & Technology Conference, Conference – Sub-committee on “Modeling & Simulation”.

• Member of the organizing committee and chairman of the technical committee of the 2st European conference on Profiting from thermal and mechanical simulation of microelectronics, EsimE2002, Paris, March ‘02.

• Member of the organizing committee and chairman of the technical committee of the 3rd European conference on Profiting from thermal and mechanical simulation of microelectronics, EurosimE2003, Paris, April ‘03.

• Member of the Technical Committee of the 10th Int. Conf. on Mechanics and Technology of Composite Materials, Sofia, Sept. 2003.

• Member of the Int. Program Committee Micro Materials conference MicroMat 2004, Berlin, April 2004.

Prof. Dr. Ir. D.J. Rixen: • Member of the international advisory comitee of the second International Conference

on Advanced Computational Methods in Engineering (ACOMEN), Liège, Belgium, May 2002.


Dr.Ir. P.Th.L.M. van Woerkom: • International Astronautical Federation (IAF), co-chairman in the Symposium on

Astrodynamics. • American Institute of Aeronautics and Astronautics (AIAA): International Advisor for

Guidance, Control and Dynamics.


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14. Overview of research input and output. 14.1 Input “Engineering Mechanics (2)” related to EM, 2002

Sources of financing1 Total 1 2 3 number fte Senior academic staff 6 - 1 7 2.6 Supporting staff 3 - - 3 -2

PhD 3.5 1 2.5 7 5.63

Postdocs 1 - 1 2 1.5 Total 13.5 1 4.5 19 9.7

1 Sources of financing: 1: University 2: STW, SON, NWO, FOM 3: Industry, TNO, Brite-Euram, Nuffic, Min. Econ. Affairs, NIMR, DPI etc. 2 No research input involved for supporting staff. 3 Research input per PhD per year: 0.8 fte

14.2 Output “Engineering Mechanics (2)” related to EM, 2002

Total Scientific publications: refereed journals 7 Scientific publications: books, chapters in book 2 Scientific publications: refereed proceedings 20+1* PhD theses 2

* in co-operation with other EM-groups


-----


9. RESEARCH DOCUMENTATION OF THE GROUP COMPUTATIONAL MECHANICS, STRUCTURAL MECHANICS AND DYNAMICS


Delft University of Technology Department of Civil Engineering and Geosciences

2. Subprogrammes related to research school EM. 2.1 Localisation Phenomena 2.2 Advanced Computational Procedures 2.3 Structural Dynamics

3. Group director. Dr.Ir. L.J. Sluys


Askes, Dr.Ir. H.A. UD 0.5 Metrikine, Dr.Ir. A.V. UD 0.5 Sluys, Dr.Ir. L.J. UHD 0.5 Stroeven, Dr.Ir. M. UD 0.1 Wells, Dr.Ir. G.N. UD 0.4 Total fte: 2.0


Gitman, B.Sc. I.M. (PhD 3) Micro-macro modelling of fracture in

partially saturated materials MeMa

Iacono, Ir. C. (PhD 2) Computational modelling of bore-hole stability

MeMa

Pannachet, Ir. T. (PhD 2) Advanced discretisation technique for combined continuum-discrete fracture

CoMe

Simone, Ir. A. (PhD b) Computational modelling of fibre-reinforced concrete

MeMa

6. Postdocs: name, country, project title, research theme EM and period of stay. Bennett, Dr. T.; U.K.

Computational modelling of fracture in porous media; 1 January – 30 April, 2002

2.1 MeMa


Liu, Dr. W.Y.; China

The analysis of brittle materials under high impact; 1 January – 30 September, 2002

2.1 MeMa


7.1 Localisation Phenomena: Simulation of (multiscale) failure and the associated phenomenon of strain localisation for the entire range of materials. Activities focus on improved computational procedures and on the integration of experimental methods and sophisticated computational procedures. Related to the research theme "Mechanics of Materials".

7.2 Advanced Computational Procedures: The Computational Mechanics Group is concerned with the development of computational models for the simulation of the behaviour of materials and structures. For this purpose accurate and robust models are made for the temporal and spatial discretization and algorithms are constructed for the efficient, accurate and robust solution of the ensuing non-linear algebraic equations. As such it provides basic tools that are utilized in structural engineering research. Related to the research theme "Computational Mechanics".

7.3 Structural Dynamics: The development of analytical procedures for moving loads (railway transport) and the analysis of waves for non-destructive testing. Related to the research theme "Structural Dynamics and Control".


8.1 Refereed journals Alfaiate, J.; G.N. Wells; L.J. Sluys.: On the use of embedded discontinuity elements with crack path continuity for mode-I and mixed-mode fracture; Engineering Fracture Mechanics, 69, p.661 – 686, 2002. Aristov, S.N.; I.M. Gitman: Viscous flow between two moving parallel disks: exact solutions and stability Analysis; J. Fluid Mech., 464, p.209-215, 2002. Askes, H.: Discretisation Aspects of and Numerical Simulations with Higher-Order Gradient Models; Journal of the Mechanical Behavior of Materials.,13 (3-4), p.149-173, 2002. Askes, H.; L.J. Sluys: Explicit and implicit gradient series in damage mechanics; European Journal of Mechanics A/Solids, 21, p.379-390, 2002. Askes, H.; A.S.J. Suiker; L.J. Sluys: A classification of higher-order strain-gradient models – linear Analysis; Archive of Applied Mechanics, 72, p.171-188. (In co-operation with group “Engineering Mechanics (1)” (TUD)), 2002. Chang, C.S.; H. Askes; L.J. Sluys: Higher-order strain/higher-order stress gradient models derived from a discrete microstructure, with application to fracture; Engineering Fracture Mechanics, 69, p.1907-1924, 2002. Chang, C.S.; T.K. Wang; L.J. Sluys; J.G.M. van Mier: Fracture modeling using a micro-structural mechanics approach - I. Theory and formulation; Engineering Fracture Mechanics, 69, p.1941-1958, 2002. Chang, C.S.; T.K. Wang; L.J. Sluys; J.G.M. van Mier: Fracture modeling using a micro-structural mechanics approach - II. Finite element analysis; Engineering Fracture Mechanics, 69, p.1959-1976, 2002. Gutierrez, M.A.; H. Askes: Simulation of special loading conditions by means of non-linear constraints imposed through Lagrange multipliers; Communications in Numerical Methods in Engineering, 18, p.699-709. (In co-operation with group Engineering Mechanics (1)), 2002.


Metrikine, A.V.; H. Askes: One-dimensional dynamically consistent gradient elasticity models derived from a discrete microstructure - Part 1: Generic formulation; European Journal of Mechanics A/Solids, 21, p.555-572, 2002. Metrikine, A.V.; H. Askes: One-dimensional dynamically consistent gradient elasticity models derived from a discrete microstructure - Part 2: Static and dynamic response; European Journal of Mechanics A/Solids, 21, p.573-588, 2002. Verichev, S.N.; A.V. Metrikine: Instability of Bogie Moving on a Flexibly Supported Timoshenko Beam; Journal of Sound and Vibration, 253(3), p.653-668, 2002.

Wells, G.N.; L.J. Sluys; R. de Borst: A p-adaptive scheme for overcoming volumetric locking during plastic flow; Computer Methods in Applied Mechanics and Engineering, 191, p.3153-3164. (In co-operation with group “Engineering Mechanics (1)” (TUD)), 2002. Wells, G.N.; L.J. Sluys; R. de Borst: Simulating the propagation of displacement discontinuities in a regularised strain-softening medium; International Journal for Numerical Methods in Engineering, 53(5), p.1235-1256. (In co-operation with group “Engineering Mechanics (1) (TUD)), 2002. Wells, G.N.; R. de Borst; L.J. Sluys: A consistent geometrically non-linear approach for delamination; International Journal for Numerical Methods in Engineering, 54, p.1333-1355. (In co-operation with group “Engineering Mechanics (1)” (TUD)), 2002.

8.2 Books, Chapters in book

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Alfaiate J.; L.J. Sluys: Analysis of a compression test on concrete using strong embedded discontinuities. H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner (eds.), WCCM V - Fifth World Congress on Computational Mechanics, Vienna, Austria, http://wccm.tuwien.ac.at, Paper-ID:81254, 2002. Askes, H.; Z. Uthman: r-Adaptive mesh optimisation in structural engineering. In: Proceedings of the 8th National Convention on Civil Engineering, Advanced Technologies for the Development of Civil Engineering, Khon Kaen, Thailand, p.94-102, 2002. Askes, H.; N. Pastor; A. Rodrigez-Ferran: Combined rh-adaptive remeshing strategies for error estimatiors and error indicators. H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner (eds.), WCCM V - Fifth World Congress on Computational Mechanics, Vienna, Austria, http://wccm.tuwien.ac.at, Paper-ID:80395, 2002. Bennett, T.; L.J. Sluys: Modelling the influence of moisture flow on concrete fracture. H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner (eds.), WCCM V - Fifth World Congress on Computational Mechanics, Vienna, Austria, http://wccm.tuwien.ac.at, Paper-ID:80444, 2002. Biondini, F.; F. Bontempi; A. Simone: Optimisation of the structural performance in R.C. design. C.K. Choi and W.C. Schobrich (eds.), In: Proceedings of the Second International Conference on Advances in Structural Engineering Mechanics (ASEM '02), Busan, Korea, CDROM (8 pages), 2002. Biondini, F.; F. Bontempi; A. Simone: Progettazione ottimale di strutture in cemento armato di assegnate prestazioni. In: Giornate AICAP 2002, 22nd Convegno Nazionale, Le Moderne Strategie A Garanzia Del Servizio Dell Opere di C.A. E C.A.P., Bologna, Italia, p.83-92, 2002. Borst, R. de; H. Askes; M.A. Gutierrez; G.N. Wells: A unified numerical approach to plastic strain localization and discrete failure In: A.S. Khan and O. Lopez-Pamies (eds.); Proceedings PLASITICITY '02: The 9th International Symposium on Plasticity and Its Current Applications, Aruba, the Netherlands, p.561-563, 2002. (In co-operation with group “Engineering Mechanics (1)” (TUD)). Georgin, J.F.; W. Nechnech; J.M. Reynouard; L.J. Sluys: A coupled damage-viscoplasticity model for localisation problems. H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner (eds.), WCCM V - Fifth World Congress on Computational Mechanics, Vienna, Austria, http://wccm.tuwien.ac.at, Paper-ID:80594, 2002. Guo, Z.; P. Stroeven; L.J. Sluys; Y. Cheng: New constitutive model in DIANA for rubber-like materials.


M.A.N. Hendriks, J.G. Rots (eds.); Proceedings of the 3rd Diana World Conference, Finite Element in Civil Engineering Applications, Tokyo, Japan, p.361-368, 2002.

Guo, Z.; L.J. Sluys; P. Stroeven: New computational modeling of rubber-like materials. In: Second FAE International Symposium, Creating the Future, Gemikonagi, TRNC, Lefke University, Turkey, p.163-167, 2002. Metrikine, A.V.: Instability of Vibrations of a Moving Object on an Elastic Structure In: International Workshop Wave 2002 on Wave Progpagation, Moving Load and Vibration Reduction - Journal of the Faculty of Environmental Science and Technology, Okayama University, Japan (Special Edition), p.69-72, 2002. Mier, J.G.M. van; J.C. Walraven; L.J. Sluys; A.L.A. Fraay; K. van Breugel: Experimental and Numerical Research Programme for the Design and Optimization of Various Aspects of Concrete Behaviour. HERON, 46(3), p.147-150, 2001. Munts E.; S.J. Hulshoff; G.N. Wells; H. Bijl; R. de Borst: A multiscale method for linear convection-diffusion using partitions of unity. H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner (eds.), WCCM V - Fifth World Congress on Computational Mechanics, Vienna, Austria, http://wccm.tuwien.ac.at, Paper-ID: 80132, 2002. (In co-operation with group “Engineering Mechanics (1)” (TUD)) Pannachet, T.; H. Askes: The new hierarchical finite element method: performance analyses. In: Proceedings of the 8th National Convention on Civil Engineering, Advanced Technologies for the Development of Civil Engineering, Khon Kaen, Thailand, p.26-30, 2002. Pannachet, T.; H. Askes: Partition-of-unity based p-adaptivity and error estimation in the finite element method. H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner (eds.), WCCM V - Fifth World Congress on Computational Mechanics, Vienna, Austria, http://wccm.tuwien.ac.at, Paper-ID:276, 2002. Pannachet, T.; P. Diez; H. Askes: Error estimation and p-adaptivity based on the partition of unity method B.H.V. Topping and Z. Bittnar (eds.), In: Proceedings of the Sixth International Conference on Computational Structures Technology, Prague, Czech Republic, CDROM (12 pages), 2002.

Proft, K. de; W.P. de Wilde; L.J. Sluys: A combined damage-plasticity model for discontinuous modeling of fracture. H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner (eds.), WCCM V - Fifth World Congress on Computational Mechanics, Vienna, Austria, http://wccm.tuwien.ac.at, Paper-ID:81479, 2002. Proft, K. de; W.P. de Wilde; L.J. Sluys: A discrete model for cyclic mode-I loading. In: Second International Conference on Advanced Computational Methods in Engineering (ACOMEN 2002), Liege, Belgium, CDROM (11 pages), 2002. Proft, K. de; W.P. de Wilde; L.J. Sluys: A combined experimental - numerical study to monotonic and cyclic behaviour of limestone. C.A. Brebbia, S-I. Nishida (eds.), In: Damage & Fracture Mechanics VII - Computer Aided Assessment & Control, Praag, p.257-264, 2002.

Remmers, J.J.C.; G.N. Wells; R. de Borst: Analysis of delamination growth with discontinuous solid-like shell elements. H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner (eds.), WCCM V - Fifth World Congress on Computational Mechanics, Vienna, Austria, http://wccm.tuwien.ac.at, 2002. (In co-operation with group “Engineering Mechanics (1)” (TUD)). Simone, A.; G.N. Wells; L.J. Sluys: Discontinuous modelling of crack propagation in a gradient-enhanced continuum. H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner (eds.), WCCM V - Fifth World Congress on Computational Mechanics, Vienna, Austria, http://wccm.tuwien.ac.at, Paper-ID:80299, 2002. Simone, A.; G.N. Wells; L.J. Sluys: Simulating discontinuities in a gradient-enchanced continuum. A.V. Dyskin, X. Hu and E. Sahouryeh (eds.), In: Proceedings of the International Conference on Structural Integrity and Fracture (SIF 2002), Perth, Australia, 2002. Sluys, L.J.; Y. Estrin: Multi-level analyse of shear banding in crystalline materials. In: A.S. Khan and O. Lopez-Pamies (eds.); Proceedings PLASITICITY '02: The 9th International Symposium on Plasticity and Its Current Applications, Aruba, the Netherlands, p.81-83, 2002. Sluys, L.J.; J.F. Georgin; W. Nechnech; J.M. Reynouard: A coupled damage-viscoplasticity model for concrete fracture. M.A.N. Hendriks, J.G. Rots (eds.); Proceedings of the 3rd Diana World Conference, Finite Element in Civil Engineering Applications, Tokyo, Japan, p.45-50, 2002.


Stroeven, M.; H. Askes; L.J. Sluys: A numerical approach to determine representative volumes for granular materials. H.A. Mang, F.G. Rammerstorfer, J. Eberhardsteiner (eds.), WCCM V - Fifth World Congress on Computational Mechanics, Vienna, Austria, http://wccm.tuwien.ac.at, Paper-ID:80395, 2002. Wells, G.N.; L.J. Sluys; R. de Borst: Computational modelling of cracks in viscoplastic media. K. Ravi-Chandar, B.L. Karihaloo, T. Kishi, R.O. Ritchie, A.T. Yokobori Jr., T. Yokobori (eds.), In: Advances in Fracture Research (ICF 10), Honolulu, USA, CDROM (6 pages), 2001. (In co-operation with group “Engineering Mechanics (1)” (TUD)). Wells, G.N.; L.J. Sluys: On the conceptual equivalence of embedded strong discontinuity and smeared crack formulations. HERON, 46(3), p.181-190, 2001. Wells, G.N.; R. de Borst; L.J. Sluys: Analysis of cohesive cracks under quasi-static and dynamic loading. In: B.L. Karihaloo (ed.), Analytical and Computational Fracture Mechanics of Non-Homogeneous Materials (IUTAM), Cardiff, U.K., Kluwer Academic Publishers, p.293-302, 2002. (In co-operation with group “Engineering Mechanics (1)” (TUD)).


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Dr.Ir. L.J. Sluys: • Advanced computational techniques for the discontinuous modeling of fracture, Fifth

World Congress on Computational Mechanics (WCCM V), Vienna, Austria, July 2002.

12. Membership international scientific committees.

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13. Awards and patents. -----


14. Overview of research input and output. 14.1 Input “Computational Mechanics, Structural Mechanics and Dynamics” related to EM, 2002

Sources of financing1 Total 1+b 2 3 number fte Senior academic staff 5 - - 5 2.0 Supporting staff 1 1 - 2 -2

PhD 1 2 1 4 3.23

Postdocs - - 2 2 1.0 Total 7 3 3 13 6.2

1 Sources of financing: 1: University 2: STW, SON, NWO, Fom 3: Industry, TNO, Brite-Euram, Nuffic, Min. Econ. Affairs, NIMR, DPI etc. 2 No research input involved for supporting staff 3 Research input per PhD per year: 0.8 fte

14.2 Output “Computational Mechanics, Structural Mechanics and Dynamics” related to EM, 2002

Total Scientific publications: refereed journals 10+5* Scientific publications: books, chapters in book - Scientific publications: refereed proceedings 23+5* PhD theses -



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10. RESEARCH DOCUMENTATION OF GROUP APPLIED MECHANICS and POLYMER ENGINEERING

1. University/Faculty. University of Twente

Faculty of Engineering Technology

2. Subprogrammes related to research school EM. 2.1 Structural Dynamics 2.2 Mechanics of Forming Processes 2.3 Composites

3. Group directors.

Prof.Dr.Ir. A. de Boer Prof.Dr.Ir. J. Huétink Prof.Dr.Ir. H. Tijdeman Dr.Ir. R. Akkerman


Akkerman, Dr.Ir. R. UD 0.2 Boer, Prof.Dr.Ir. A. de Full Professor 0.4 Boogaard, Dr.Ir. A.H. van den UD 0.2 Geijselaers, Ir. H.J.M. UD 0.2 Hoogt, Dr.Ir. P.J.M. van der UD 0.3 Huétink, Prof.Dr.Ir. J. Full Professor 0.2 Meinders, Dr.Ir. V.T. UD 0.2 Spiering, Ir. R.M.E.J. UD 0.3 Tijdeman, Prof.Dr.Ir. H. Full Professor 0.4 Warnet, Dr.Ir. L. UD 0.2 Wijnant, Dr.Ir. Y.H. UD 0.4 Total fte: 3.0


5.1 Structural Dynamics

Beijers, Ir. C.A.J. (PhD 3) Fluid-structure interaction and acoustics StDy Hannink, Ir. M.H.C. (PhD 3) Fluid-structure interaction and acoustics StDy Huls, Ir. R. (PhD 3) Fluid-structure interaction and acoustics StDy Oude Nijhuis, Ir. M.H.H. (PhD 1) Fluid-structure interaction and acoustics StDy


Tillema, Ir. H.G. (PhD 3) Acoustics and vibrations of bearings StDy Visser, Ir. R. (PhD 2) Fluid-structure interaction and acoustics StDy

5.2. Mechanics of Forming Processes

Avetisyan, Ir. M. (PhD 3) Sheet metal forming/springback CoMe Yu, Ir. Y. (PhD 3) Semi continuous processes CoMe

5.3. Composites

Kruijer, Ir. M. (PhD 3) Reinforced Thermoplastic Pipes MeMa Lamers, Ir. E.A.D. (PhD 3) High Precision Rubber Pressing CoMe Loendersloot, Ir. R. (PhD 3) Resin Transfer Moulding CoMe Thije, Ir. R.H.W. ten (PhD 3) Resin Transfer Moulding CoMe Villa-Rodriguez, Ir. B.H. (PhD 3) Resin Transfer Moulding CoMe Wijskamp, Ir. S. (PhD 3) High Precision Rubber Pressing CoMe

6. Postdocs: name, country, project title, research theme EM and period of stay. Datta, Dr. K. Metastable stainless steel; May 2001-Jun

2003 5.2 CoMe

Wisselink, Dr.Ir. H.H. Plate forming; Mar 2000- Mar 2004 5.2 CoMe


7.1 Structural Dynamics (Prof.Dr.Ir. A. de Boer, Prof.Dr.Ir. H. Tijdeman)

The research in this discipline is directed towards fluid-structure interaction, with emphasis on acousto-elastic coupling of plate-type structures and the accompanying noise production. Related subjects concern the reduction of noise emission from bearings and active and/or passive isolation and vibration damping techniques to suppress structure born noise, and research on efficient analysis and measuring methods for source localisation.

Dynamical and Acoustical Behaviour of Bearings The subject concerns development of concepts to oppose the vibration transmission path through a roller bearing. The vibrations of the rotating parts in an engine cause part of the noise radiated by the housing of the engine. These vibrations are transmitted through the roller bearings and excite the housing. The objective is to reduce the excitation level by support the bearing in such a way that vibrations are not transmitted from the rotating parts to the housing. The study includes the development of a feasible concept, the development of a design tool for this kind of problems and an extensive experimental validation programme. The research is carried out under contract with the SKF Engineering and Research Centre. This research is the subject of the PhD-thesis by Hedzer Tillema, to be defended on the 27th of February 2003. Fluid-Structure Interaction and Acoustics The aim of these studies is to develop and validate methods to reduce the noise emitted from vibrating structures. Attention is focused on models for the interaction of vibrating structures with the surrounding air. Topics of special interest are:


(1) Viscothermal wave propagation New, analytical models, which include the effects of inertia, viscosity and thermal conductivity, led to the development of a new finite element for viscothermal wave propagation in narrow gaps. Coupling of this acoustic element with finite elements for the structure enables fully coupled acousto-elastic calculations for a complex geometry to be made. The models were validated with specially designed experiments. The enormous effect that the presence of air can have on the vibrational behaviour of a structure was shown and it appeared possible to generate a considerable amount of damping. Further studies will be performed towards practical applications.

(2) Sound-absorbing materials.

A closely related part of the research program, involves the development and validation of a model to predict and optimise the impedance of sound-absorbing materials. Emphasis is put on the development of highly efficient sound-absorbing configuration of bores, arranged in an optimal way. Further studies are under way to design optimised acoustic panels and sound absorbing devices for computers.

The knowledge gained in Part (1) and Part (2) is now applied and further extended for research on 1. reduction of noise generated by computers 2. reduction of cabin noise in aircraft, which is carried out within the European project

FACE (Friendly Aircraft Cabin Environment). This research will be the subject of the PhD-thesis of Marieke Hannink.

(3) Active and passive vibration damping

A third method to reduce the noise emitted from vibrating structures is to damp the structural vibrations, which cause the noise. This can be carried out by damping the vibrations of the structure directly or by isolating the source that excites the structure (e.g. engine in a car). Vibration damping and isolation can be performed with passive means like viscous layers or rubber springs and active means like a linear motor or an electromagnet. A combination of passive and active means is possible too. This is called hybrid damping. It is the subject of the PhD-thesis by Clemens Beijers. At the moment research is carried out on the application of hybrid damping for engine mounts with the objective to reduce noise caused by structural vibrations excited by the engine. The latter is focussed on isolation; in the case of vibration damping piezoelectric material is an interesting material to damp actively vibrations of plate like structures. Experimental and numerical research is carried on the behaviour of piezoelectric material on plate like structures in combination with control algorithms. It is the subject of the PhD-thesis by Marco Oude Nijhuis.

(4) Efficient analysis and measuring methods for source localisation

Acoustic source localisation concerns a combination of measuring and numerical analysis methods with the goal to detect the parts of a structure that are responsible for the generation of noise. The idea is to measure the sound pressure or particle velocity on a grid around the radiating object and to determine the radiating source with inverse analysis methods. One of the methods under investigation is the so-called multilevel method developed by the Tribology group of the University of Twente. The project consists of three parts: (1) the development of the multigrid/multilevel method for acoustic radiation problems, (2) a study on the applicability of microflowns (sensors that measure the particle velocity) for this purpose and (3) the validation and integration to a complete measuring chain for practical applications. It is the subject of the PhD-thesis by René Visser.

(5) Thermo-acoustic structural interaction

During combustion in a gasturbine noise is generated which can interact with the gasturbine wall. Due to this interaction undesirable acoustic pressure fields can be


generated that disturb the flame. The latter can affect the efficiency of the combustion process. The objective of this study is to investigate the interaction between the gasturbine structure and the thermo-acoustic pressure generated in the combustion chamber. This study is carried out in close collaboration with the Thermal Mechanics group of the University of Twente.

The research is conducted in close collaboration with several leading industries and technological institutes. All activities within the subprogramme “Structural Dynamics” are related to the research theme “Structural Dynamics and Control”.

7.2 Mechanics of Forming Processes (Prof.Dr.Ir. J. Huétink) The research in this discipline is directed towards the development and validation of numerical methods to simulate forming and production processes of metals. The fundamental problems associated with new algorithms, the inclusion of relevant boundary conditions like contact and friction between tool and product, and the deformation of flexible tools are addressed. These fundamental problems obviously occur in very important technologies that have attracted renewed attention in recent years, e.g. rubber pad forming and hydroforming processes. Therefore these processes will serve for benchmarking of software tools. Processes as rolling, extrusion and also laser hardening can be approximately modelled as continuous (steady state) processes. Hence special attention is paid to (fast) solution algorithm for finding directly a steady state solution.

Simulation of Sheet Metal Forming An efficient finite element code has been developed for the simulation of deep drawing of products with a complex geometry. The code is operational in a number of industries. Emphasis is put upon the modelling of drawbeads, adaptive remeshing based on error estimation, interfacing with (commercial) design and preprocessing codes, and tailored blanks. Besides research is being carried out on an advanced material model for sheet metalforming. The test facility allows for biaxial loading under simultaneous bi-directional shear and tension/ compression of sheet metal. An extensive set of experiments is carried out. The research in this area is linked with the Graduate School CIPV: “Centre for Integrated Manufacturing and Development”. Attention is paid to aluminium sheet forming with local heating of the sheet and the die. It appears that the deformability can considerably be increased by this kind of technology The research aims at a design technique for stretching and drawing processes for light metals parts. This technique should improve manufacturing practice with respect to process limits (wrinkling and tearing) and materials usage. The project focuses on aluminium sheet of AA 5xxx and 6xxx alloys of 0.5 mm to 1.5 mm thickness and magnesium sheet. With the newly determined anisotropy parameters and a Vegter yield criterion, forming limit curves were determined, using a Marciniak-Kuczynski analysis. Also the effect of the hardening function, strain rate dependency hardening on the predicted forming limit was considered. It was shown that the predicted forming limit depends very much on the applied material model. With a proper shape of the yield locus and a proper hardening function, realistic forming limits can be obtained. The material model is much more critical than in a non-localising forming simulation. All activities within the subprogramme “Mechanics of Forming Processes” are related to the research theme “Computational Mechanics”.


7.3 Composites (Dr.Ir. R. Akkerman)

The Composites Group conducts research into the mechanisms and modelling of deformation and failure of continuous fibre composites under different rates of loading. This modelling is combined with an experimental programme (for identifying the mechanisms operating) to establish material property data for the modelling and to test the modelling accuracy.

Composite Damage Development These studies are aimed at gaining insight into damage development in continuous fibre reinforced plastics in order to optimise materials and structures with respect to impact performance. Topics of special interest are: Impact resistance of composite materials Composite materials are known to be susceptible to impact damage. The effect of rate on the damage development can be significant in e.g. air and road transport applications. Rate effects are also significant in protective applications, where composites can be used as a means of efficient energy absorption. The rate dependency of the fracture phenomena is examined from an experimental and an analytical point of view, going from quasi-static loading conditions up to 300 m/s impact. Related work considers the crash compatibility of car structures, in co-operation with TNO Automotive. Large Diameter Reinforced Thermoplastic Pipe This Eureka funded programme started in June 2001, in co-operation with Pipelife Pipelife (NL), Seaflex AS (N), Sulzer Innotec (CH). The initial work on Reinforced Thermoplastic Pipes concentrated on 4” Aramid reinforced polyethylene pipes, Pipelife’s Soluforce system. The deformation and fracture behaviour of these commercially available pipes is now well understood for short term loading conditions. These results will be published in 2003. Current research work focuses on the long term behaviour, in which the regression of both the aramide and the polyethylene play a significant role. The Eureka project as a whole concentrates more and more on steel cord reinforcement of the RTP’s. For the Pipelife/UT contribution this in fact results in simpler modelling, as creep in the high strength steel cords is negligible. High Precision Composites Moulding The main focus within this theme was on High Precision Rubber Press Forming of Thermoplastic Laminates. The manufacturing time of advanced composite products can be reduced significantly by making use of reinforced thermoplastic materials. In Rubber Press Forming, consolidated laminates are reheated (by infrared heating) and pressed on relatively cold tooling, resulting in short moulding cycles (in the order of minutes). This does, however, lead to high temperature gradients during cooling, which causes additional residual stresses. In order to accommodate for the resulting product distortions, the tooling needs to be corrected. The aim of this project is to predict these corrections using Finite Element techniques for both the drape and the cooling stage. The partners in this project are Ten Cate Advanced Composites and Fokker Special Products, the funding is provided by the Netherlands Agency for Aerospace Programmes (NIVR). In 2002 significant advances were made in FE drape modelling. Critical experiments were performed of single layer laminates on a “double dome” geometry, proving the validity of the current approach. Experiments on quasi-isotropic laminates identified the need for an efficient multi-layer model for process analyses within this programme, of which preliminary results were presented. Also in the residual stress analyses for the rubber press forming, transverse shear was identified as a dominant phenomenon, for which an extension of the multi-layer model is currently being developed.


Resin Transfer Moulding An important part of the research work on Resin Transfer Moulding is performed in collaboration with (and supported by) the National Aerospace Laboratory (NLR). Within this project, a tool is being developed to predict the fibre orientation generated by (automated) braiding of RTM performs, and the resulting composite properties, to be used as an input for structural analyses. Also an inverse approach will be implemented, by which the braiding process parameters will be predicted from design stiffnesses. A generic description of the mandrel was implemented in 2002, allowing a straightforward transfer of CAD data to the enhanced braid simulator. Further efforts were concentrated on analysing tri-axial reinforcements and effects of friction on the fibre orientation. Secondly, a design tool is developed for the prediction of the permeability and compressibility of reinforcements of various architectures. The current approach starts from simple modelling of highly idealised configurations. The resulting low CPU times allow for rigorous statistical analyses, which appear to capture essential characteristics not found from geometrically complex models that cannot be used in conjunction with statistics. Complementary work on more detailed accurate representations is being performed in collaboration with the KU Leuven (in the group of Lomov & Verpoest). Within the Framework 5 programme FALCOM (Failure, Performance and Processing Prediction for Enhanced Design with NCF Composites) UT focuses on processability issues in NCF composites. The main deliverables are models for permeability, compressibility and drapeability. Good progress was made on the analysis of the effects of drape on permeability and compressibility. The deformation mechanisms in draping dry NCFs were identified and quantified. The earlier developed multi-layer FE model appears to be a suitable platform to incorporate also this specific constitutive behaviour. All activities within the subprogramme “Composites” are related to the research themes “Mechanics of Materials” and “Computational Mechanics”.


Akkerman, R.: On the properties of Quasi-Isotropic Laminates; Composites Part B, Engineering, 33(2), pp 133-140, issn. 1359-8368, 2002. Boogaard, A.H. van den; P.J. Bolt; R.J. Werkhoven: Modeling of AlMg sheet forming at elevated temperatures; International Journal of Forming Processes, Vol. 4, 2002, pp 361-375, issn. 1292-7775, 2002. Boogaard, A.H. van den; T. Meinders; J. Huetink: Effcient implicit finite element analysis of sheet forming processes; International Journal for Numerical Methods in Engineering; Vol 56, pp 1083 –1107, 2002. Dijkstra, P.T.S.; D.J. van Dijk; J. Huetink: A microscopy Study of the Transition From Yielding to Crazing in Polypropylene; Polymer engineering and science, 42(1), pp 152-160, issn. 0032-3888, 2002. Kessels, J.F.A.; R. Akkerman: Prediction of the yarn trajectories on complex braided performs; Composites Part A, Applied science and manufacturing, 33(8), pp 1073-1081, issn. 1359-835X, 2002. Meinders, T.; A.H. van den Boogaard; J. Huétink: Improvement of implicit finite element code performance in deep drawing simulations by dynamic contributions; Journal for Materials Processing Technology, 134, pp 413-420, 2002.

8.2 Books, Chapters in book

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8.3 Refereed proceedings Boogaard, A.H. van den; P.J. Bolt; M.H.F.M. van Hout; R.J. Werkhoven: Aluminium sheet forming simulations: influence of the yield surface; In Pietrzyk, M., Mitura, Z. & Kaczmar, J. (Ed.), The 5th International Conference on Material Forming, Krako, isbn. 83-7108-098-0, pp. 511-514, 2002. Datta, K.; H.J.M. Geijselaers; J Huetink; A. Groen; A. Dinsdale; J.A. Post: Finite element calculation of the driving force for austenite to martensite phase change in stainless steels; In -- (Ed.), ABAQUS Benelux Users Meeting, Eindhoven, 2002. Datta, K.; J.A. Post; H.J.M. Geijselaers; J. Huetink; J. Beijer: Finite element modelling of concurrent deformation and transformation in metastable steels; In -- (Ed.), ABAQUS World Users Conference, New Port, RI, USA, 2002. Dijkstra, P.T.S.; D.J. van Dijk; J. Huetink, J: Elastic Effects at Failure in Polypropylene at High Strain Rates; In White, J.L. (Ed.), Polymer Processing Society, 18th Annual Meeting (PPS-18), Guimaraes, Portugal, CD-rom, pp. 197-197, 2002. Dijkstra, P.T.S.; D.J. van Dijk; J. Huetink: Morphological Study of Strained Polypropylene; In White, J.L. (Ed.), Polymer Processing Society, 18th Annual Meeting, (PPS-18), Guimaraes, Portugal, CD-rom, pp. 160-160, 2002. Kloosterman, G; A.H. van den Boogaard; J. Huetink: An efficient contact search algorithm; In Pietrzyk, M., Mitura, Z. & Kacmar, J. (Ed.), 5th International ESAFORM Conference on Material Forming. Krakow, Poland. isbn. 83-7108-098-0, pp. 99-102, 2002. Lamers, E.A.D., R. Akkerman; S. Wijskamp: Drape modelling of multilayer fabric reinforced thermoplastic laminates; In Michell Marmel, M. (Ed.), Texcomp-6 conference. Philadelphia, USA. CD-rom. Lamers, E.A.D., R. Akkerman; S. Wijskamp: Fibre orientation modelling for rubber press forming of thermoplastic laminates; In Pietrzyk, M., Mitura, Z. & Kaczmar, J. (Ed.), 5th International ESAFORM Conference on Material Forming. Krakow, Poland. isbn. 83-7108-098-0, pp. 323-326, 2002. Meinders, V.T.; J. Huetink; A.H. van den Boogaard: An algorithm to make your implicit code competitive with an explicit code ; Numisheet 2002, D.-Y. Yang, S.I. Oh, H. Huh and Y.H. Kim (eds.), pp. 405- 410, 2002. Selman, A., V.T. Meinders; A.H. van den Boogaard; J. Huetink: Comprehensive adaptive mesh refinement in wrinkling prediction analysis; In Yang, D.-Y., Oh, S.I., Huh, H. & Kim, Y.H. (Ed.), Numisheet 2002, (pp. 355-359), 2002. Selman, A., V.T. Meinders; A.H. van den Boogaard; J. Huetink: On adaptive mesh refinement in wrinkling prediction analysis; In Pietrzyk, M., Mitura, Z. & Kaczmar, J. (Ed.), the 5th International ESAFORM conference on Material Forming, Krakow, Poland, pp. 551-554. 2002. Tillema, H.G.; J.A. Wensing: Acoustic analysis of an induction motor with viscoelastic bearing supports; In Selamet, Ahmet (Ed.), Internoise Conference, Detroit MI, USA. isbn. CD-rom, pp. 1-6, 2002. Tillema, H.G.; J.A. Wensing: Validation of a rotor dynamics model with viscoelastic bearing supports; In Maia, Nuno M.M. (Ed.), International conference on Structural Dynamics Modelling, Madeira, Portugal, pp. 593-602, 2002. Ven, E.C. van de; S. Wijskamp; E.A.D. Lamers; R. Akkerman: Thermal characterisation of thermoplastic composites; White, J.L. (Ed.), Polymer Processing Society, 18th Annual Meeting (PPS-18). Guimaraes, Portugal. isbn. CD-rom, 2002.

Wisselink, H.H.; J. Huetink: 3D FEM simulations of the rolling of stator vanes, including tool deformation; In Kiuchi, M., Nishimura, H. & Yanagimoto, J. (Ed.), International Conference on Technology of Plasticity, Yokohama, Japan, pp. 571-576, 2002. Wisselink, H.H.; J. Huetink: Tool deformation during the shape rolling of stator vanes; In Pietrzyk, M., Mitura, Z. & Kaczmar, J. (Ed.), 5th International ESAFROM Conference on Material forming. Krakow, Poland. isbn. 83-7108-098-0, pp. 371-374, 2002.


9. Dissertations: related to research school EM: name, title, university, date and advisors. Name: Boogaard, A.H. van den Title: Thermally enhanced forming of aluminium sheet—

Modelling and experiments, University of Twente, December 2002, ISBN 90-365-1815-6

Advisor: Prof. Dr.Ir. J. Huétink Current position: UD at University of Twente

Name: Kloosterman, G. Title: Contact methods in finite element simulations

University of Twente, December 2001, ISBN 90-77172-04-1. Advisor: Prof. Dr.Ir. J. Huétink

Name: Zuiderduin, W.C.J. Title: Deformation and fracture of Aliphatic Polyketones

University of Twente, 31 mei 2002, ISBN 90-365-17656. Advisor: Prof. Dr.Ir. J. Huétink


Prof.Dr.Ir. J. Huétink: • Reviewer Int. J. for Numerical Methods in Engineering • Reviewer J. of Materials Processing Technology • Reviewer & member of scientific advisory committee of Int. J. of Forming Processes Dr.Ir. R. Akkerman • Reviewer Composite Structures • Reviewer Composite Science and Technology • Reviewer Composites

11. Keynote lectures and seminars. ----

12. Membership International Scientific Committees. Prof.Dr.Ir. J. Huétink • Member of the NUMIFORM Steering Committee • Member of advisory panels of several international conferences • Member Board of directors ESAFORM, European scientific association for material

forming • Numisheet scientific committee

Prof.Dr.Ir. H. Tijdeman • MARIN (Maritime Research Institute Netherlands): Member of scientific advisory board

(1996-to date). • Hermann von Helmholtz Gemeinschaft Deutscher Forschungszentren (HGF): Reviewer

strategy fund


• Member of the accreditation committee for the department of Aerospace Engineering of the Technical University of Bucharest, October 2002

• Member of the program committee of the International Conference on Noise and Vibration Engineering, ISMA 2002, Leuven, September, 2002

Prof.Dr.Ir. A. de Boer • Netherlands representative in the EUCLID ((European Cooperation for the Long Term in

Defence Programme) consortium VIBRANT on “Hybrid vibration isolation and damping” • Member of organizing committee of the IFASD (International Forum on Aero-elasticity and

Structural Dynamics) Dr.Ir. R. Akkerman • Member of the organising committee of the Composites minisymposium within the

Esaform conference


14. Overview of research input and output 2002 14.1 Input “Applied Mechanics and Polymer Engineering” related to EM, 2002

Sources of financing1 Total 1 2 3 number fte Senior academic staff 10 1 - 11 3.0 Supporting staff 1 - - 1 -2

PhD 1 1 12 14 11.2

Postdocs - - 2 2 1 Total 12 2 14 28 15.2

1 Sources of financing: 1: University 2: STW, SON, NOW, FOM 3: Industry, TNO, Brite-Euram, Nuffic, Min. Econ. Affairs, etc. 2 No research input involved for supporting staff. 3 Research input per PhD per year: 0.8 fte

14.2 Output “Applied Mechanics and Polymer Engineering” related to EM, 2002

Total Scientific publications: refereed journals 6 Scientific publications: books, chapters in book - Scientific publications: refereed proceedings 16 PhD theses 3



Project Title: Friction and Roughness Transfer in Rolling and Metal Forming

Processes. Participating Groups: Applied Mechanics and Polymer Engineering(UT) Surface Technology and Tribology (UT) Participants: Prof. Dr.Ir. J. Huetink, Ir. E.C. Dillingh (TNO), Prof. Dr.Ir. D.J. Schipper (UT) Research Input in fte: 1.0 Project Title: Hybrid Isolation of Construction noise (HIC) Participating Groups: Applied Mechanics and Polymer Engineering (UT) Mechanical Automation (UT) Participants: Prof. Dr. Ir. A. de Boer (UT), Prof. Dr. Ir. B. Jonker (UT),

Ir. C. A.J. Beijers (UT), Ir. H. Super (UT), Dr.Ir. J.van Dijk (UT), Ir. G. Nijsse (UT)



11. RESEARCH DOCUMENTATION OF GROUP SURFACE TECHNOLOGY and TRIBOLOGY


Faculty of Engineering Technology

2. Subprogrammes related to research school EM. 2.1 Tribology 2.2 Surface Technology and Roughness 2.3 Materials and Coatings 2.4 Experimental Validation

3. Group directors. Ir. W.E. ten Napel Prof.dr.ir. D.J. Schipper (from 15-04-2002)


Napel, Ir. W.E. ten UHD 0.1 Rooij, Dr.Ir. M.B. de UD 0.3 Schipper, Prof.Dr.Ir. D.J. Full Professor 0.3 Venner, Dr.Ir. C.H. UD (till: 01-09-2002) 0.3 Total fte: 1.0

5 PhD-projects related to research school EM 2002: name, source of financing, project title and research theme EM.

5.1 Tribology

Deladi, MSc. E.L. (PhD 3) Static Friction StDy Drogen, Ir. M. van (PhD 3) Load carrying capacity CVT StDy Hernandez Ramirez, MSc. I.

(PhD 2) Fast algorithms for acoustic computations

StDy

5.2 Surface Technology and Roughness

Dillingh, E.C (PhD 3) Friction and roughness transfer MeMa Faraon, MSc. I. (PhD 3) Friction in Continuous Variable

Transmission StDy

Jamari, Ir. J. (PhD 3) Running-in of surfaces StDy


Tasan, MSc. C. (PhD 2) Contactless detection and monitoring of

micro- and macro wear using imaging methods

MeMa

5.3 Materials and Coatings

Heide, Ir. E. van der (PhD 3) Lubricant failure in sheet metal forming MeMa Masen, Ir. M. (PhD 3) Tool coatings MeMa Pasaribu, Ir. H.R. (PhD 2) Nano-scale wear resistant ceramic

materials with low friction MeMa

5.4 Experimental Validation

Popovici, MSc. G. (PhD 3) Starved Lubrication StDy Tampubolon, H.A. (PhD 3) Cold Rolling StDy


-----


The subject of research in surface technology and tribology is the interaction of material surfaces and all engineering practices related thereto. The nature of the interaction between the opposing surfaces depends on the operational conditions. Therefore: A) different lubrication regimes are distinguished: full film lubrication, mixed lubrication and boundary lubrication and B) unlubricated or dry contact. The physics describing the interaction is quite different. Since in most mechanical engineering applications all regimes are encountered, research is conducted in all these areas, with special attention for the transitions between the regimes. The modelling is aimed at design tools for reliable and accurate prediction of tribological behaviour in practical applications. The main subjects are I) Lubricated systems: (elasto-) hydrodynamic lubrication, mixed- and boundary lubrication, II) Special materials and Coatings and III) Biomedical tribology.

7.1 Tribology The research conducted in this subprogramme deals with the frictional behaviour in lubricated concentrated contacts. Special attention is paid to the rheology of the lubricant, shear thinning effects and starvation. Besides this the local interaction between the opposing surfaces is studied by developing elastic-plastic contact models. On the basis of this work one is able to predict for line- and point contacts the Stribeck curve for 1) heavily loaded contacts, II) shear thinning of the lubricant and III) starved lubricated contacts. It is found that shear thinning has, depending on the shear thinning characteristics of the lubricant used, a significant influence on the transition full-film lubrication and mixed lubrication and a decrease of the coefficient of friction in the elasto-hydrodynamic lubrication regime. Which is of importance with respect to fuel efficiency of combustion engines. Due to the fact that one is able to predict friction in these contacts one is able in combination with the critical contact temperature hypothesis to predict the load carrying capacity of lubricated systems. For systems set in


motion or set still friction is determining the position of a system in time and space. Therefore, in this subprogramme attention is paid to this phenomenon (static friction). Related to research theme “Structural Dynamics and Control”.

7.2. Surface technology and Surface Roughness

Surface roughness has a significant influence on the tribological behaviour (friction and wear) of a system. Therefore, the prediction of the change in roughness, running-in, as a function of the operational conditions is one of the topics which is under investigation by the surface technology and tribology group. Modeling takes place by combining a contact model and a wear model. On the basis of this combined model one can determine what the initial roughness should be to generate a certain roughness level during operation. It is, for instance, possible to generate micro-EHL instead of boundary lubricated micro-contacts. In other applications, like a continuous variable transmission, the surface roughness should not change too much in order to maintain a certain friction level. The change in surface roughness cannot be detected in the traditional way (profile measurements). The surface technology and tribology group developed algorithms that can be applied to images obtained by interference microscopy. By matching and stitching several images before and after a tribological experiment the change in surface roughness can be determined in a quantitative way (deterministic and statistically). This change in roughness is the result of local deformation and the wear mechanism involved. For certain applications, as for instance in sheet metal forming, transfer of sheet material to the tool changes the micro-geometry of the tool significantly and as a result friction changes during operation. Related to research themes “Computational Mechanics”, “Mechanics of Materials” and “Structural Dynamics and Control”.

7.3 Materials and Coatings

Oxide ceramics (alumina, zirconia and their composites) and Metal Matrix Composites (aluminum based) are studied because of their specific properties. The research focuses on the development of nano-scale oxide ceramic couples with low friction. The reason for this is that in previous research it was shown that nano-scale oxide ceramics are highly wear resistant. However, the application of these materials is hampered by the fact that the coefficient of friction is too high, 0.5 and higher likewise for other ceramics. Therefore, metal oxides are added during the material processing of oxide ceramics. The basis for this idea is that the additive forms a thin interfacial layer between the opposing surfaces during rubbing. Initial experiments showed that the coefficient of friction could be reduced to a value of 0.2 for a sliding distance of 4 km. A patent was issued and granted. The mechanism of the interfacial layer formation will be studied as well as the friction will be modeled in order to optimize the ceramic material. The MMC material in this subprogramme is aluminum reinforced with spherical aluminum oxide particles. Optimized reinforcement is realized by using a specific particle size distribution. Large particles are added for load carrying capacity and small particles are added to the MMC for stress relieve between the particles resulting in a higher ductility. A wear model is made to predict the wear of tool steel in contact with this MMC. In sheet metal forming processes coatings are becoming more and more important. This because lubricants are more and more omitted for environmental reasons. Large tools in sheet metal forming are made of cast iron. By locally re-melting, by using a laser, and subsequently applying a layer, by means of PVD, a duplex coating for these applications is studied. The modeling with respect to friction and wear focuses on local ploughing, cutting and wedge formation. Related to research theme “Mechanics of Materials”.

7.4 Experimental Validation


Different friction and wear models are developed which are validated by experiments. For certain processes, as for instance cold rolling, models are available which are not validated by experiments yet. In this research measurement techniques will be developed to measure friction and wear under specific operational conditions. Attention is paid to measure 1) on line micro-wear by using an interference microscope and 2) friction during cold rolling in the roll-bite by means of a special designed friction sensor. Related to research theme “Structural Dynamics”.


8.1 Refereed journals Masen, M.A.; C.H. Venner; P.M. Lugt; J. Tripp: Effects of surface micro-geometry on the lift-off speed of an EHL contact; Tribology transactions, 45(1), pp. 21-30, ISSN 1040-2004, 2002.

8.2 Books, Chapters in Books

-----

8.3 Refereed proceedings Brogle, B.; D.J. Schipper: Highly Reinforced Wear Resistand Metal Matrix Composites with Improved Ductility; In Stachowiak, Gwidon W. (Ed.), Proceedings of the 6th International Tribology Conference, Austrib '02 "Frontiers in Tribology". (pp. 583-588). Perth, Autralia. ISBN 1 74052 086, 2002. Heide, E. van der; D.J. Schipper: Galling initiation due to frictional heating; In -- (Ed.), Proceedings Nordtrib 2002. Stockholm, Sweden, ISSN 1400-1179, 2002.

Masen, M.A.; M.B. de Rooij: Abrasive wear between rought surfaces in deep drawing; In Stachowiak, Gwidon W. (Ed.), Proceedings of the 6th International Tribology Conference, Austrib '02 "Frontiers in Tribology". (pp. 601-608). Perth, Australie. ISBN 1 74052 086, 2002.

Pasaribu, H.R.; J.W. Sloetjes; D.J. Schipper: Mild to Severe Wear Transition of Ceramics; In Stachowiak, Gwidon W. (Ed.), Proceedings of the 6th International Tribology Conference, Austrib '02 "Frontiers in Tribology". (pp. 47-52). Perth, Australia. ISBN 1 74052 085 8, 2002.

Pasaribu, H.R.; J.W. Sloetjes; D.J. Schipper: Wear transition of ceramics; In -- (Ed.), Proceedings 23rd IRG-OECD meeting. Coimbra, Portugal, 2002. Sloetjes, J.W.; Y.C. Tasan; M.B. de Rooij; D.J. Schipper: Algorithm for determining 3D changes in micro-geometry using image processing techniques; In -- (Ed.), ASIATRIB Conference. Jeju Island, Korea, 2002.

9. Dissertations: related to research school EM: name, title, university, date and advisors. Name: Jacod, B.C. Title: Friction in elasto-hydrodynamic lubrication.

Universiteit Twente, August 2002. 106 pp. (Enschede: FEBOdruk). isbn. 90-365-1782-6.

Advisor: Prof.dr.ir. H. W. M. Hoeijmakers


Name: Liu, Q. Title: Friction in mixed and elastohydrodynamic lubricated contacts

including thermal effects. Universiteit Twente, September 2002. 122 pp. (Enschede: Febodruk). isbn. 90-365-1796-6.

Advisor: Prof.dr.ir. D. J. Schipper


Ir. W.E. ten Napel • Member editorial board Lubrication Science Prof.Dr.Ir. D.J. Schipper • Member editorial board Industrial Lubrication and Tribology • Member editorial board Tribotest.

Dr.Ir. C.H. Venner • Member editorial board Journal of Engineering Tribology • Member of editiorial board of Proceedings of the Institute of Mechanical Engineers

(ImechE) part J: Journal of Engineering Tribology. • Associate Editor of the American Society of Mechanical Engineers (ASME) Journal

of Tribology


12. Membership International Scientific Committees. Prof.Dr.Ir. D.J. Schipper: • Secretary of the International Research group on Wear of Materials, IRG-OECD. • Member University Grants Committee of the University of Hong Kong.



14. Overview of research input and output. 14.1 Input “Surface Technology and Tribology” related to EM, 2002

Sources of financing1 Total 1 2 3 number fte Senior academic staff 4 - - 4 1.0 Supporting staff2 2 - - 2 - 2

PhD - 3 9 12 9.63

Postdocs - - - - - Total 6 3 9 18 10.6

1 Sources of financing: 1: University 2: STW, SON, NOW, FOM 3: Industry, TNO, Brite-Euram, Nuffic, Min. Econ. Affairs, etc. 2 No research input involved for supporting staff. 3 Research input per PhD per year: 0.8 fte

14.2 Output “Surface Technology and Tribology” related to EM, 2002

Total Scientific publications: refereed journals 1 Scientific publications: books, chapters in book - Scientific publications: refereed proceedings 6 PhD theses 2

15. Co-operation with other EM-groups: project title, participating groups, participants and research input in fte. Project Title: Friction and Roughness Transfer in Rolling and Metal Forming

Processes. Participating Groups: Applied Mechanics and Polymer Engineering (UT) Surface Technology and Tribology (UT) Participants: Prof. Dr.Ir. J. Huetink, Ir. E.C. Dillingh (TNO), Prof. Dr.Ir. D.J. Schipper (UT) Research Input in fte: 1.0


12. RESEARCH DOCUMENTATION OF GROUP MECHANICAL AUTOMATION


Faculty of Mechanical Engineering

2. Subprogrammes related to research school EM. 2.1 Robotics and Machine Dynamics 2.2 Hybrid Isolation of Structure Borne Noise

3. Group director.

Prof.Dr.Ir. J.B. Jonker


Aarts, Dr.Ir. R.G.K.M. UD 0.2 Dijk, Dr.Ir. J. van UD 0.2 Jonker, Prof.Dr.Ir. J.B. Full Professor 0.2 Total fte: 0.6


5.1 Robotics and Machine Dynamics

Graaf, Ir. M.W. de (PhD 1) Seam-tracking for robotized laser welding StDy Postma, Ir. S. (PhD 3) On-line weld-pool control in laser welding StDy Waiboer, Ir. R.R. (PhD 3) Off-line programming software for laser

welding StDy

5.2 Hybrid Isolation of Structure Borne Noise

Nijsse, Ir. G. (PhD 1) State-space based active vibration isolation control algorithms

StDy

Super, Ir. H. (PhD 1&3) Hybrid isolation of structure borne noise StDy


-----



The research topics of the group Mechanical Automation related to the speciality of Engineering Mechanics can be summarised as:

7.1 Robotics and Machine Dynamics The kinematics and dynamics of mechanisms and manipulators or, more generally, multibody systems with non-linear behaviour due to large displacements and/or rotations are treated with a non-linear finite element method. In this approach mechanisms may be composed of both rigid and flexible components. Based on this theory a general-purpose computer program “SPACAR” has been developed. Furthermore, the linearization and subsequent use of modal techniques resulted in a computationally efficient simulation algorithm. In collaboration with the Joining group of the Technical University of Delft and Corus, a NIMR project is carried out in which SPACAR is used in combination with off-line programming software for laser welding. The aim is to predict the weldability of a complex weld seam with a specific robot. This requires a combination of accurate dynamic simulations of the robot’s motion path and a database with extensive knowledge of the required process settings and allowable tolerances. For the simulations accurate dynamic models of the robot and the controller are necessary. Several parameter identification techniques have been applied. A linear parameter model for the first three robot axes was already quite successful. For further improvement and extension to all six axes, a non-linear parameter identification technique is being developed. For realistic closed-loop simulations a controller model has been created based on manufacturer data and experimental validation with common system identification techniques. Also joint friction plays an important role. Furthermore, the actual tip performance is being investigated using a 6-DOF camera based measurement system to verify the real performance of the system for laser welding.

On-line weld-pool control in laser welding The objective of this NIMR project is the design of a feedback control system for the laser welding process. Optical signals emitted from the weld pool area and the plume have been measured with photodiodes and a CMOS camera. The photodiode signals are clearly related to weld quality characteristics such as width and penetration depth. Feedback controllers have been developed either to maintain a well-defined (partial) penetration depth or to maintain full penetration. In most cases the laser power is used as the actuator for the welding process. Where possible, dynamical models of the laser, welding process and sensors have been obtained with system identification and are used for the controller design. The controllers have been tested in experiments in which e.g. disturbances in the welding speed are applied. The most reliable controller has been extended with a second feedback loop for the welding speed. With this setup the laser power and welding velocity are adjusted in real-time to ensure full penetration and optimal process conditions with minimal heat input at the highest production rate. For a further improvement the applicability of a sensor based on a CMOS camera is being investigated. With well-chosen optical filters this sensor gives images of the surface temperature around the weld pool. E.g. changes from full to partial penetration can be observed quite clearly. Seam-tracking for robotized laser welding In many practical situations robotized laser welding cannot be successful without using a seam-tracking sensor. Such a sensor measures the relative position and orientation of the robot tip with the laser head with respect to the seam. From such data the actual seam position with respect to the robot coordinate system has to be calculated. Typical applications are a priori teaching of an unknown seam or real-time measurement of


differences between the actual seam position and a nominal seam, e.g. due to thermal loading. The scope of this project covers the development and testing of advanced seam tracking algorithms. It involves the whole seam tracking system starting with the sensor, the interfacing with the robot controller, the actual processing of the measured data and the resulting robot tip motion. An important part of this work will deal with non-ideal system components like errors in the kinematic model of the robot and in the calibration of the sensor and laser tool centre point (TCP). To study the significance of these errors the whole seam tracking system will be modelled. In this model the effects of each imperfection can be analysed separately or in combinations. As a first step a model of the sensor has been created. Simulations with this model mimic the real behaviour of the sensor quite accurately. In the near future this model will be used to check and improve procedures for sensor and laser TCP calibration and for both a priori and real-time seam tracking.

Related to the research theme "Structural Dynamics and Control".

7.2 Hybrid Isolation of Structure Borne Noise

Reduction and isolation of vibration in machines and mechanical structures is important for a large number of industrial and consumer applications. Passive vibration isolation techniques, using e.g. springs and dampers, are well known and widely used. However, the achievable performance can be insufficient in some cases. In co-operation with TNO-TPD and other research groups of our university we are studying the applicability of active vibration control for the isolation of structure borne noise. Research is focussed on obtaining an optimal reduction of noise levels in compartments of vehicles by using a combination of active and passive isolation techniques. An example of such a hybrid isolation system is the use of hybrid mounts to isolate engine vibrations from the support structure. Two laboratory demonstrators have been realized. In one set-up only one degree of freedom (DOF) is considered. In the second set-up six piezo actuators isolate the vibrations induced by a shaker in a plate in all six DOF’s. Both demonstrators are being used for the development of control systems. For that purpose several control schemes are being implemented and tested for their applicability. In one promising control scheme an adaptive control system is combined with an accurate linear model of the so-called secondary path. This secondary path describes the contribution from the piezo actuators to the vibration of the plate. The linear models are obtained using subspace system identification techniques. Related to the research theme "Structural Dynamics and Control".


Jonker, J.B.; R.G.K.M. Aarts: Dynamic simulation of planar flexible link manipulators using adaptive modal integration; Multibody Systems Dynamics (ISSN 1384-5640) 7 (1) pp. 31-50, 2002. Postma, S.; R.G.K.M. Aarts; J. Meijer; J.B. Jonker: Penetration control in laser welding of sheet metal; Journal of Laser Applications (ISSN 1042-346X) 14 (4) pp. 210-214, 2002. Schrijver, E.; J. van Dijk: Disturbance Observers for Rigid Mechanical Systems: Equivalence, Stability and Design; Journal of Dynamic System, Measurement and Control (ISSN 0022-0434) 124 (4) pp. 539-548, 2002.



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8.3 Refereed proceedings Postma, S.; R.G.K.M. Aarts; J. Meijer; J.B. Jonker: Feedback Control for Optimal Production Speed in Laser Beam Welding of Mild Steel; 10 pages on CDROM in Proceedings of the ICALEO 2002 (ISBN 0-912035-72-2), Scottsdale, Arizona , (USA), October 14-17, 2002. Super, H.; J. van Dijk; J.B. Jonker: Experimental Set-up for Hybrid Isolation of Structure Borne Sound; pp. 1416-1425 in Proceedings of the 8th Mechatronics Forum International Conference Mechatronics 2002, Ed. J. van Amerongen, J.B. Jonker, P.P.L. Regtien and S. Stramigioli (ISBN 90 365 17664) Enschede, The Netherlands, Drebbel Institute for Mechatronics, June 24-26, 2002. Waiboer, R.R.; I. Vermeij; R.G.K.M. Aarts; J.B. Jonker: Three Degree of Freedom Robot Identificaton for Dynamic Simulation; pp. 534-543 in Proceedings of the 8th Mechatronics Forum International Conference Mechatronics 2002, Ed. J. van Amerongen, J.B. Jonker, P.P.L. Regtien and S. Stramigioli (ISBN 90 365 17664) Enschede, The Netherlands, Drebbel Institute for Mechatronics, June 24-26, 2002.

9. Dissertations: related to research school EM: name, title, university, date and advisors. -----

10. Membership editorial boards international journals. -----


12. Membership international scientific committees. -----


Postma, S.; R.G.K.M. Aarts; J. Meijer: Method and device for measuring and controlling a laser welding process; International PCT/NL02/00571 patent application of NL patent 1018861, August, 2002.


14. Overview of research input and output. 14.1 Input “Mechanical Automation” related to EM, 2002

Sources of financing1 Total 1 2 3 Number fte

Senior academic staff 3 - - 3 0.6 Supporting staff - - - - -2

PhD 2.5 - 2.5 5 4.03

Postdocs - - - - - Total 5,5 - 2.5 8 4.6

1 Sources of financing: 1: University 2: STW, SON, NWO, FOM 3: Industry, TNO, Brite-Euram, Nuffic, Min. Econ. Affairs, etc. 2 No research input involved for supporting staff. 3 Research input per PhD per year: 0.8 fte

14.2 Output “Mechanical Automation” related to EM, 2002

Total Scientific publications: refereed journals 3 Scientific publications: books, chapters in book - Scientific publications: refereed proceedings 3 PhD theses -

15. Co-operation with other EM-groups: project title, participating groups, participants and research input in fte. Project Title: HIC: Hybrid isolation of structure borne noise. Participating Groups: Applied Mechanics and Polymer Engineering (UT),

Mechanical Automation (UT). Participants: Prof.Dr.Ir. A. de Boer (UT), Ir. C.A.J. Beijers (UT),

Prof.Dr.Ir. J.B. Jonker (UT), Dr.Ir. J. van Dijk (UT), Ir. H. Super (UT), Ir. G. Nijsse (UT).



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