Institute for Carbon CompositesFundamental research on material behavior, processing technology and simulation of high performance composite materials

Prof. Dr.-Ing.

n The focus of the Institute for Carbon Composites in 2014-15 was to establish and strengthen its research program within the four research groups. The main goal was to explore new ways and possibilities to reduce the process cycle time and the raw material costs to be able to implement high performance composite structures in high volume appli- cations. Different process technologies using e.g. tailored textiles and advanced matrix systems have been patented. New material models and process simulation methods have been developed and these were imple- mented in conventional software tools to enable advanced composites part and process design solutions.

Klaus Drechsler Process Technology for Fibers and Textiles

Contact

www.lcc.mw.tum.de drechsler@lcc.mw.tum.de Phone +49.89.289.15092

The Process Technology for Fibers and Textiles group focuses on improving manufacturing technologies that arrange the fibers in their desired orientation within a composite component.The group’s three research teams cover the fields of braiding technology, automa- ted fiber placement and tailored textiles. With highly developed processing equip- ment, the fibers can be brought into shape in an automated and reproducible way.

Fiber Placement CenterMany activities in 2015 focused on the setting up of a new Fiber Placement Center at the institute’s laboratory site on the Ludwig Bölkow Campus in Taufkirchen. Three different types of fiber placement machines have been installed there toform a unique machine park.

Machine ParkBesides a machine for the direct proces- sing of fiber tapes with thermoplastic mat- rices, an additional machine for the useof thermoset resin tapes has been set up. This machine was moved from Garching to Taufkirchen in summer. In the courseof this relocating process it was equipped with an additional linear axis to increase the production space. Both machines are now capable of manufacturing composite parts with a length of up to 5 m. Furthermore, the Institute’s fiber patch placement system will be relocated

to Taufkirchen as well. Thus, all thesedifferent manufacturing processes can be

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Newly set up automated fiber placement cell inTaufkirchen

usefully combined e.g. to locally reinforce big composite structures.

CollaborationsThe full potential of the Fiber Placement Center for the future development of composite processing technologieswill leverage through direct interaction with research and industry partners on the campus. Especially promising are collaborations with the institute’s spin-offcompanies that are also located in Taufkir- chen. These will greatly help to accelerate transferring research results into industrial applications

Public Funded Projectsn AIF project ‘3D-formbare Nassvliese’n AIF project ‘FullCycle’ n AIF project ‘Accurat3’ n EU project ‘INSCAPE’n BMBF project ‘MAIplast’n BMBF project ‘MAIprofil’n BMBF project ‘AIRCARBON II’n BMBF project ‘MAItank’

Process Technology for Matrix Systems

The Process Technology for Matrix Systems group addresses the robust and efficient processing of matrix systems for the production of continuous fiber reinforced composite parts. On the one hand, the basic understanding of matrix systems,the characterization of impregnation properties of the fiber material for optimized processing, and process engineering are central for the group. On the other hand, associated issues such as tool technology, surface sealing, and process integrationare key activities of the group.

Hybrid Materials and Structures –First Prize for LCC at the AVK InnovationAward Ceremony

The LCC won the AVK innovation award in the category ‘Research and Science’

The aim of the team is to expand the span of applications of composites. One example for this is the EU-funded project MATISSE with the main partners Autoliv, Daimler, Virtual Vehicle, TU Graz, Airborne andTU Munich where a shape adaptive fiber-reinforced crash structure was designed and investigated. The AVK Industrievereini- gung Verstärkte Kunststoffe e.V. honored the project with their innovation awardon 21st of september in Stuttgart in the category ‘Research and Science’.

Team Processes and Production Systems – New equipment for energy efficient processing

An industrialized microwave oven was installed in the lab of the LCC. The aimis to develop energy-efficient processingof fiber reinforced composites. Direct, volumetric heating and indirect heating with absorber materials is investigated to reach more optimized conditions within the production chain.

Team Tooling Systems – SuccessfulProject FinalizationThe EU-funded project LeeTorb tested the application of self-heating tools out of CFRP for aerospace RTM processing. The consortium (Fraunhofer ICT-FIL, qpoint composite and TU Munich) was able to convince the industrial partner Airbus Helicopter of the energy efficient tool design with a full-scale tool and demonstrator part of a helicopter rotor blade.

New industrialized microwave oven at the LCC

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Full-scale demonstrator tool for a helicopter rotor blade developed by the project ‘Leetorb’

Braiding process simulation of a generic structure

Simulation

Forming and Flow Process Simulation This research team works on the simulation of composite manufacturing processes. This comprises the simulation of forming technologies like draping, braiding and automated fiber placement as well as infiltration methods. Last year’s activities focused on the characterization of different materials. The goal of these investigations is to determine material properties and hence, simulation input. Finite element simulation models for draping and braiding processes were also

Public Funded Projectsn AIF project ‘HoMehr’n BMBF project ‘FLAME’n BMBF project ‘InFo’n BMBF project ‘MAIplast’n BMBF project ‘MAIfo’n BFS project ‘FORCiM3A’n BFS project ‘TIP’n EU project ‘Disacop’n EU project ‘LeeTorb’

developed and validated. The validation consisted of comparing simulation to experimental results.

Compaction, Curing andConsolidation SimulationResearch efforts in this team are dedica- ted to modeling of cure induced effects on the final part’s properties and appearance with a focus on compaction behavior and porosity content, thermal managementand process induced deformations. In2015, implementation and validation has been concluded for modeling the thermal management of large scale resin transfer molded aerospace structures as well as the consolidation of out-of-autoclave prepregs. Magnitude and shape of global deformation modes identified experi- mentally for a spar structure (featuring amaterial with engineered vacuum channels and manufactured with a caul) werefound to significantly differ from simulated deformations, demanding more detailed process modeling of complex structures. To tackle this issue and gain furtherinsight in the importance of compaction and resin flow related phenomena on the part’s quality, future activities will focuson transferring modeling capabilities from lamina level to arbitrary three-dimensionalmanufacturing setups.

Out-of-autoclave consolidation - validation of a stochastic approach for initial degree of impregnation modeling

Material Modeling and StructuralAnalysisThe Material Modeling and Structural Analysis research team focuses on the structural analysis of fiber reinforced plastics as well as mechanical and bonded joints at different length scales.One research focus is the prediction of the constitutive behavior of textile-reinforced composites using unit cells. A frameworkis proposed predicting the non-linear mechanical response of triaxial braided composites using mesoscopic finite element unit cells. In order to capture the predominant failure modes observed in braided composites, the model comprises a physically based damage model inside the yarns, plasticity in the resin pockets, and delamination at the yarn-matrix interfaces.Another research area consists of thenon-linear behavior of angle-ply laminates. A constitutive model for composite lami- nates is developed with the focus on the distinction between inducing mechanisms. It is shown, that the effect of fiber rotation and damage is essential in consideration of large deformations. To ensure the appli- cability to structural parts, the numerical model is validated by a large number of

various angle-ply tension and off-axis compression tests, fabricated of the same carbon/epoxy IM7-8552 material.

Public Funded Projectsn DFG project ‘DR 204/5-1, G8’n STMWIVT project ‘ComBo’ n BMBF project ‘MAIdesign’ n BMBF project ‘transhybrid’ n BMBF project ‘MAIprofil’n BMBF project ‘MAIform’n BMBF project ‘MAITAI’n BMBF project ‘MAIhiras+handle’n BFS project ‘FORCiM3A’n EU project ‘LeeTorb’

Roadmap and data flow for gene- rating a realistic unit cell model for braided composite materials

Material Behavior and Testing

The Material Behavior and Testing group focuses on the investigation of the material response of fiber-reinforced polymermatrix composites.At the testing laboratories of the LCC a broad spectrum of state-of-the-art test methods and equipment is

available, covering thermo-analytical methods,

rheology and microscopy, experimental methods to measure permeability and drapability of UD and textile preforms, as well as static and high strain rate mecha- nical testing.

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An important focus of the group is on the area of high strain rate testing, where split Hopkinson bars for compression, tension

Four-point bending test (left) and double-cantilever-beam (DCB) mode I fracture toughness test (right) performed at static loading.

High strain rate UD glass-epoxy tension specimen installed in split-Hopkinson tension bar (SHTB).

and torsional loading, installed in 2012 and 2013, are used to reach strain rates of up to 1000 s-1.In 2014 and 2015 various aerospace com- posite materials were investigated under tension and compression loads at impact rates of strain (bird strike scenario). Recently the focus is on the development and testing of high strength tension specimens (e.g. UD glass-fiber composite and fiber-metal laminates) as well as the investigation of the fracture toughness properties of composite materials.

Research Focusn Process technology for fibers and

textilesn Process technology for matrix systemsn Simulationn Material behavior and testing

CompetenceThe LCC takes an interdisciplinary approach to research, extending from raw materials through implementation of manufacturing technologies to complete composite components. With specially developed simulation methods, the composite manufacturing process chain can be represented virtually.

Infrastructuren Composite technical lab ‘Preforming

and Thermoset Injection Technology’n Composite technical lab ‘Thermoplastic

Technology’n Composite test laborn Computing cluster

Failure envelope for combined compression-shear loading of 5-harness-satin weave carbon-epoxy at static loading (qs) and high strain rates of 200 s-1 (ir) and 1000 s-1 (hr) [Koerber et al. Int J Solids Struct 54,2015].

Coursesn Materials and Process Technologies for

Carbon Compositesn Composite Materials and Structure-

property Relationshipn Analysis and Design of Composite

Structuresn Production Technologies for Composite

Partsn Process Simulation and Material

Modeling of Compositesn Carbon and Graphite – High Perfor-

mance Materials for Key Industriesn Supply Chain and Value Creation

Composites

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ManagementProf. Dr.-Ing. Klaus Drechsler, DirectorDr. mont. Elisabeth Ladstätter

Adjunct ProfessorsDr.-Ing. Oswin ÖttingerDr.-Ing. Christian Weimer

Administrative and Technical StaffCigdem Filker Diana Zinke Gabriele UrukDaniel Amrein, B.Sc.Helmut Josef Dick Georg Lerchl Thomas Witteczek Reiner Rauch

Research ScientistsDipl.-Ing. Andreas Altmann Luciano Avila Gray, M.Sc. Dipl.-Ing. Paul Bockelmann Dipl.-Ing. Philipp Bruckbauer Dipl.-Ing. Christoph EbelDipl.-Ing. Ludwig Eberl Dipl.-Ing. Stefan Ehard Dipl.-Ing. Ralf Engelhardt Dipl.-Ing. Philipp Fahr Dipl.-Ing. Petra Fröhlich Thorsten Gröne, MBA Dipl.-Ing. Thorsten HansDipl.-Des. Benjamin HansbauerDipl.-Ing. Tobias Harbers Dipl.-Ing. Mathias Hartmann Rhena Helmus, M.Sc

Dr. techn. Roland Hinterhölzl Dipl.-Ing. Philipp Hörmann Dipl.-Ing. Bernhard HornDipl.-Ing. Philipp KammerhoferDipl.-Ing. Kalle KindDipl.-Ing. Andreas KollmannsbergerDr. Hannes KörberTheodosia Kourkoutsaki, M.Sc.Dipl.-Ing. Jan Krollmann Peter Kuhn, M.Sc. Christian Lemke, M.Sc.Dipl.-Ing. Roland Lichtinger Dipl.-Ing. Dr. Neven Majic Dipl.-Ing. Ulrich Mandel Alexane Margossian, M.Sc.Dipl.-Tech. Math. Natalie MayerDipl.-Ing. Reinhold MeierDipl.-Ing. Felix MichlDipl.-Ing. Andreas Mierzwa Dipl.-Ing. Maximilian Mitwalsky Dipl.-Ing. Johannes Neumayer Jonathan Oelhafen, M.Sc.Dipl.-Ing. Philipp PicardMarina Plöckl, M.Sc.Dipl.-Ing. Veronika RadlmaierDipl.-Ing. Maximilian SchäferDipl.-Ing. Philipp Maximilian SchäferDipl.-Ing. David SchultheißDipl.-Ing. Alexander SchwingenschlöglDipl.-Ing. Robin TaubertDipl.-Ing. Daniel TeuflDipl.-Ing. Tobias Wehrkamp-RichterDipl.-Ing. Jakob WeilandDipl.-Ing. Thomas WettemannDipl.-Ing. Swen Zaremba

Publications 2015n Altmann, A.; Gesell, P.; Drechsler, K.:

Strength prediction of ply waviness in composite materials considering matrix dominated effects. Composite Structures 127, 2015, 51-59

n Altmann, A.; Taubert, R.; Mandel, U.; Hinterhölzl, R.;

Drechsler, K.: A continuum damage model to pre- dict the influence of ply waviness on stiffness and strength in ultra-thick unidirectional fiber-reinforced plastics. Journal of Composite Materials, 2015

n Arnold, M.; Henne, M.; Bender, K.; Drechsler, K.:

Polyamide 12 modified with nanoparticles: effect on impact behaviour and on the electrical conductivity of carbon fibre-reinforced epoxy composites. Journal of Composite Materials, 2015

n Fischer, B.; Horn, B.; Bartelt, C.; Blößl, Y.: Method

for an Automated Optimization of Fiber Patch Placement Layup Designs. International Journal of Composite Materials Vol. 5 (No. 2), 2015, pp. 37-46

n Hans, T.; Cichosz, J.; Brand, M.; Hinterhölzl, R.:Finite element simulation of the braiding process for arbitrary mandrel shapes. Composites Part A: Applied Science and Manufacturing, 2015

n Helmus, R.; Centea, T.; Hubert, P.; Hinterholzl, R.:

Out-of-autoclave prepreg consolidation: Coupled air evacuation and prepreg impregnation modeling. Journal of Composite Materials, 2015

n Helmus, R.; Hinterhölzl, R.; Hubert, P.: A Stochastic

Approach to Model Material Variation Determining Tow Impregnation in Out-of-Autoclave Prepreg Consolidation. Composites Part A: Applied Science and Manufacturing, 2015

n Kourkoutsaki, T.; Comas-Cardona, S.; Binetruy, C.;

Upadhyay, R.K.; Hinterhoelzl, R.: The impact of air evacuation on the impregnation time of out-of- autoclave prepregs. Composites Part A: Applied Science and Manufacturing 79, 2015, 30-42

n Körber, H.; Xavier, J.; Camanho, P.P.; Essa, Y.E.;

Martín de la Escalera, F.: High strain rate behaviour of 5-harness-satin weave fabric carbon-epoxy composite under compression and combined compression-shear loading. International Journal of Solids and Structures, 2015n Lichtinger, R.; Hörmann, P.; Stelzl, D.;

Hinterhölzl,R.: The effects of heat input on adjacent paths during automated fibre placement. Composites Part A: Applied Science and Manufacturing, 2015

n Mandel, Ulrich; Taubert, Robin; Hinterhölzl, Roland:

Mechanism based nonlinear constitutive model for composite laminates subjected to large deforma- tions. Composite Structures 132, 2015, 98-108n Margossian, A.; Bel, S.; Hinterhoelzl, R.:

Bendingcharacterization of a molten unidirectional carbon fibre reinforced thermoplastic composite using a Dynamic Mechanical Analysis system. Composites Part A: Applied Science and Manufacturing 77,2015, 154-163

n Neumayer, J.; Kuhn, P.; Körber, H.;

Hinterhölzl, R.: Experimental Determination of the Tensile

and Shear Behaviour of Adhesives U

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nder ImpactLoading. The Journal of Adhesion, 2015,

n Oblinger, C.; Lang, H.; Drechsler, K.: CFK/Metall-Mischbauweisen im Maschinen und Anla- genbau – wichtiger denn je. Umwelt-Technologie und Energie in Bayern, 2015, 26-28n Radlmaier, V.; Ehard, S.; Ladstätter, E.;

Drechsler,K.: Thermoplastic Automated Fiber Placement - Current Fields of Application and Future Prospects. JEC Composites Magazine (97), 2015, pp. 39-45

n Swery, E. E.; Meier, R.; Lomov, S. V.; Drechsler,

K.; Kelly, P.: Predicting permeability based on flow simulations and textile modelling techniques: Com- parison with experimental values and verificationof FlowTex solver using Ansys CFX. Journal ofComposite Materials, 2015

n Taubert, R.; Mandel, U.; Hinterhölzl, R.: Studyof layup influences on the nonlinear behavior of composites by evaluation of ply stiffness reduction. Composites Part A: Applied Science and Manufac- turing 79, 2015, 63-73

n Taubert, R.; Mandel, U.; Hinterhölzl, R.: Studyof layup influences on the nonlinear behavior of composites by evaluation of ply stiffness reduction. Composites Part A: Applied Science and Manufac- turing 79, 2015, 63-73

n Teufl, D.; Ladstätter, E.; Drechsler, K.: Reduction of

cure cycle time through microwave curing: a vision for the near future. JEC Composites Magazine (100), 2015, 10-12

n Weiland, J.; Hartmann, M.; Hinterhölzl, R.: Curesimulation with resistively in-situ heated CFRP molds: implementation and validation. Composites Part A: Applied Science and Manufacturing, 2015

n Bockelmann, P.; Drechsler, K.; Chakrabarti, A.:Research on development of Liquid CompositeMolding parts: situation & framework. ICoRD’15 – 5th International Conference on Research into Design, 2015n Brand, M.; Ladstätter, E.; Drechsler, K.:

Influenceof braid set up and roving size to mechanical properties of biaxial carbon fiber braids. Polymer Processing Society Conference (PPS) 2015, 2015

n Brouzoulis, J.; Fagerström, M.; Främby, J.; Kroll-

mann, J.; Hellström, P.: Modelling of propagating delaminations in textile reinforced duroplast beams by an enriched shell element formulation.ICCM-20 – 20th International Conference onComposite Materials, 2015

n Bruckbauer, P.; Weiland, F.; Beier, U.; Drechsler, K.: Characterization of thermoplastic/thermoset combinations – potential application for joining. SAMPE Europe Conference 15 Amiens, 2015

n Eberl, L.; Kray, N.; Zaremba, S.; Drechsler, K.:Design of Through Thickness Reinforced Compo- site/Metal Joints – With the Help of Finite Element Analysis and Quasistatic Testing Using Digital Image Correlation. CAMX 2015 – The Composites and Advanced Materials Expo, 2015

n Eberl, L.; Zaremba, S.; Drechlser, K.: ThroughThickness Reinforced Composite/Metal Joints –The Impact of the Pinning Technology on The Joint‘s Tensile Strength. ICCM-20 – 20th International Conference on Composite Materials, 2015n Fahr, P.; Hinterhölzl, R.: Evaluation of an

analyticalanalysis method for interference fit assemblies focusing on thick-walled parts based on experimen- tal data. ICCM-20 – 20th International Conferenceon Composite Materials, 2015

n Gstrein, G.; Kurzböck, C.; Opelka, J-M.; Krollmann, J.: Simulation and testing of adaptive FRP-subst- ructures for automotive safety. 24th International Technical Conference on the Enhanced Safety of Vehicles (ESV), 2015

n Hans, T.; Hinterhölzl, R.: A numerical approachmodeling the braiding process for arbitrary mandrel shapes to calculate preform properties. ICCM-20 – 20th International Conference on CompositeMaterials, 2015

n Harbers, T.; Ebel, C.; Drechsler, K.; Endres, A.; Müller, G.: Wetlaid nonwovens made from recycled carbon fiber for automotive applications. SAMPE Baltimore 2015, 2015

n Helmus, R.; Hinterhölzl, R.; Hubert, P.: A stochastic

approach to model void formation during out-of- autoclave prepreg consoldiation. ICCM-20 – 20th International Conference on Composite Materials,

2015

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n Horn, B.; Sattler, S.; Ebel, C.; Drechsler, K.: Cutting strategies of long fiber patch preforms for structures with complex fiber architecture. ICCM-20 – 20th International Conference on Composite Materials,2015

n Höck, B.; Regnet, M.; Fröhlich, A.; Wolff, M.; Ehard, S.; Sause, M.; Kupke, M.; Schullerer, G.: Successful development and monitoring of CRFP manu- facturing technologies. 64. Deutscher Luft- und Raumfahrtkongress 2015, 2015

n Höck, B.; Regnet, M.; Fröhlich, A.; Wolff, M.; Ehard,

S.; Sause, M.; Pfister, O.; Schullerer, G.: Successful development and monitoring of CFRP manufactu- ring technologies. 66th International Astronautical Congress, 2015

n Jürgens, M.; Kurtovic, A.; Mertens, T.; Kolb, M.; Grei-

temeier, D.; Lang, H.; Hombergsmeier, E.; Drechsler, K.: Influence of surface treatment and design of3D-reinforcements on delamination resistance & mechanical properties of CFRP/CFRP joints under static & fatigue loading. ICCM-20 – 20th International Conference on Composite Materials, 2015

n Jürgens, M.; Kurtovic, A.; Mertens, T.; Nogueira,

A.C.; Lang, H.; Kolb, M.; Strobach, P.; Hombergs- meier, E.; Drechsler, K.: Effect of surface treatment for metallic z-reinforcements on interlaminar fracture toughness of CFRP/CFRP joints. SAMPE Baltimore 2015, 2015

n Kammerhofer, P.; Zaremba, S.; Drechsler, K.: Inves-

tigation on the mechanical robustness of CFRP molds. ICCM-20 – 20th International Conference on Composite Materials, 2015n Kind, K.; Drechsler, K.: Method for the

productionof braided CFRP bicycle rims. SAMPE EuropeConference 15 Amiens, 2015

n Kourkoutsaki, T.; Comas Cardona, S.; Masania, K.; Upadhyay, R.; Hinterhölzl, R.: A process modeling toolkit developed to address scale-up challenges of Out-of-Autoclave manufacturing. CAMX 2015 – The Composites and Advanced Materials Expo, 2015

n Krollmann, J.; Snajdr, R.; Paz, M.; Zaremba, S.;Drechsler, K.: Hybrid-matrix approach: How to over- come the conflict of the matrix selection? Polymer Processing Society Conference (PPS) 2015, 2015

n Kuhn, P.; Plöckl, M.; Körber, H.: Experimentalinvestigation of the failure envelope of unidirecti- onal carbon-epoxy composite under high strain rate transverse and off-axis tensile loading. 11th International DYMAT Conference, 2015

n Lemke, C.; Wolfahrt, M.; Reppe, M.; Ladstätter, E.;

Drechsler, K.: Disassembly of fusion-bonded ther- moplastic composite structures. Second European Symposium on Aircraft Recycling, 2015

n Mandel, U.; Taubert, R.; Hinterhölzl, R.: A continuum

damage approach for an efficient ultimate failure analysis with layered shell elements. 5th ECCOMAS Thematic Conference on Mechanical Response of Composites, 2015n Mandel, U.; Taubert, R.; Hinterhölzl, R.:

Laminatedamage model for CFRP structures. ICCST/10– 10th International Conference on CompositeScience and Technology, 2015

n Margossian, A.; Bel, S.; Avila Gray, L.; Hinterhölzl, R.: Characterisation of tensile properties perpendi- cular to fibre direction of a unidirectional thermo- plastic composite using a Dynamic Mechanical Analysis system.

ESAFORM 2015 – 18th Interna- tional ESAFORM Conference on Material Forming,2015

n Margossian, A.; Hörmann, P.; Zemliana, K.; Avila Gray, L.; Bel, S.; Hinterhölzl, R.: Shear ch

aracteri- sation of unidirectional thermoset pre-impregnated composites using a rheometre. 19èmes Journées Nationales sur les Composites, 2015

n Mayer, N.; Hinterhölzl, R.; Prowe, J.: Structuralanalysis of composites considering manufacturing constraints. ICCS18 – 18th International Conference on Composite Structures, 2015

n Oelhafen, J.; Fernandez, R.; Niefnecker, D.;Zaremba, S.; Drechsler, K.: Flow front and cure monitoring with fibre optic sensors for thick CFRP laminates. ICCM-20 – 20th International Conference on Composite Materials, 2015

n Plöckl, M.; Kuhn, P.; Körber, H.: Characterization ofunidirectional carbon fiber reinforced polyamide-6 thermoplastic composite under longitudinal compression loading at high strain rate. 11th International DYMAT Conference, 2015

n Radlmaier, V.; Erber, A.; Brudzinski, P.-V.; Körber,H.; Drechsler, K.: Influence of different sizing on fracture toughness and flexural properties of carbon fiber reinforced polyphthalamide. ICCM-20 – 20th International Conference on Composite Materials,2015

n Radlmaier, V.; Obermeier, G.; Ehard, S.; Kollmanns- berger, A.; Körber, H.; Ladstätter, E.: Interlaminar Fracture Toughness of Carbon Fiber Reinforced Thermoplastic In-situ Joints. Polymer Processing Society Conference (PPS) 2015, 2015

n Schäfer, M.; Zaremba, S.; Drechsler, K.: Compara-tive Study on Internal and External Release Agents- Evaluation of Process Parameter Variation on Demolding Stresses. ICCM-20 – 20th International Conference on Composite Materials, 2015

n Schäfer, P.; Staden, M.; Zaremba, S.; Drechsler, K.:Material characterization for determining the con- solidation properties of carbon fiber tapes with PA 6 matrix. ICCM-20 – 20th International Conference on Composite Materials, 2015

n Taubert, R.; Mandel, U.; Hinterhölzl, R.: Influenceof the stacking sequence on the nonlinear material behvior of composite laminates related to large deformations. ICCST/10 – 10th International Conference on Composite Science and Technology,2015

n Teufl, D.; Zaremba, S.; Drechsler, K.: Adjustment of2.45 GHz Microwave Absorbing Heating Layers for Tooling Applications. Polymer Processing Society Conference (PPS) 2015, 2015

n Treffler, R.; Fröschl, J.; Drechsler, K.; Ladstätter,E.: Modelling and simulation of randomly oriented carbon fibre-reinforced composites under thermal load. MPPE 2015 – International Conference on Materials, Processing and Product Engineering2015, 2015

n Treffler, R.; Fröschl, J.; Ladstätter, E.: Einsatz wirr- faserverstärkter Duroplaste in thermomechanisch belasteten Strukturbauteilen im Fahrzeugbau. 42. Tagung DVM-Arbeitskreis Betriebsfestigkeit, 2015

n Weiland, J.; Hartmann, M.; Hinterhölzl, R.: Charac-terization and numerical investigation of an RTM cure process with CFRP molds and independent heat patches. ICCM-20 – 20th International Conference on Composite Materials, 2015