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2012

Abaqus 6.13 & Isight 5.8

What’s New in Abaqus and Isight

Copyright Dassault Systemes, SIMULIA UK RUM 2013, for personal use only.

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Enhancements in Abaqus 6.13 - Summary

Structural Mechanics

Discrete Element Method (DEM)

XFEM

Contact

Materials

Performance

SPH Parallel Enhancements

Linear Dynamics

GPU Acceleration

Large Structural Models

Pre- and Post-Processing

Modelling of Assemblies

Geometry and Meshing

Performance Improvements

Post-Processing

Multiphysics

CFD

CEL

Electromagnetics

Co-Simulation

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Structural Mechanics

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Particle methods: SPH and DEM Brief review of these methods and their applicability:

Smoothed particle hydrodynamics (SPH):

Pre-existing particle method in Abaqus/Explicit

For modelling continuum undergoing large deformation

Lagrangian method with evolving connectivity & special interpolation

Parallelization enhancement in Abaqus 6.13

Discrete element method (DEM)

First release in Abaqus/Explicit 6.13

For modelling interactions between large numbers of individual particles

Rigid particles, with any compliance of particles built into contact model

Different from SPH which models continuum materials

Kernel function

W(r)

Particle

Neighbours

5

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XFEM – Distributed pressure on crack surfaces Allows users to define distributed pressure loads on XFEM surfaces

Automatically creates an internal crack surface

Currently limited to pressure loads

Generalized 3D pressure penetration capability

Newly created crack surfaces in a vessel

subjected to pressure loadings

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General Contact in Abaqus/Standard Recent developments for general contact in Abaqus/Standard:

0 = not available

1 = non-default

2 = default

Edge-to-Surface

Formulation

Edge-to-Edge

Formulations

Type of edges Abaqus release

6.11 6.12 6.13

Solid 1 2 2

Shell 0 2 2

Beam 0 0 2

Type of edges Contact direction 6.11 6.12 6.13

Beam Radial 0 0 1

Cross product 0 0 1

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Beam contact in Abaqus/Standard Ball-to-woven-net example

Involves beam-to-surface and beam-to-beam contacts

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Beam contact in Abaqus/Standard

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Accurate fast simulations of cable strands

Solid model Beam model

Zhang, P., et. Al., Applications and Impact of the New Beam-to-

Beam Contact Capabilities to Industries, SCC 2013

Beam contact in /Std

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Pressure-dependent penalty stiffness

Simple Example:

Base state (response to loading

in a general step)

Frequency step; 2nd eigenmode

is shown for default behavior

2nd eigenmode with new, nondefault

setting; contact constraints only enforced

where contact pressure in base state

exceeds a specified threshold

Same active contact constraints

Set of active constraints remains fixed throughout a perturbation step

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Material modelling Parallel rheological framework for polymers in Abaqus/Explicit

Additional creep laws

Temperature dependency via TRS

Mullins Effect

User-defined Equation of State: VUEOS

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Performance

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SIM-based implementation for coupled

structural-acoustic modes

Benchmark example: engine cover model

Frequency response analysis time

Abaqus 6.12 – 1h 3min

Abaqus 6.13 – 1min

Linear Dynamics

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Linear Dynamics AMS-based substructure generation

Significantly improves the performance of the overall substructure generation procedure

Abaqus Release

(AMS Recovery)

6.12

Conventional

(Full)

6.13

Enhanced

Conventional

(Full)

6.13

AMS-based

(Selective)

*FREQUENCY (h:mm) 2:30 2:21 1:41

*SUBSTRUCTURE GENERATE

(h:mm)

(RECOVERY MATRIX=NO,

FLEXIBLE BODY)

81:51 20:56 0:01

TOTAL TIME (h:mm) 84:21 23:17 1:42

~14x

~4x

Machine Information

Intel Xeon Westmere X5690 (3.4GHz)

2x6 cores

96GB memory

1.5TB disk space

Model Information

13M DOFs with free-interface

Number of retained DOFs: 1188

Number of dynamic modes: 490 (below 10kHz)

Substructure size: 1678

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GPU Acceleration More hardware supported

Nvidia C2050, C2070, C2075, K20,

K20X, Quadro 6000

Improved output to message file

Shows GPU use

Support for unsymmetric solver

1.20

1.25

1.30

1.35

1.40

1.45

1.50

Standard speedup with GPU

accelerated unsymmetric solver

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Large structural models Performance, capacity, and scaling for

large models

Airframe modelling focus

Joint effort on batch Pre, /Standard and

/Explicit with Databases & Performance

Architecture Group

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Roller Dip simulation

1 million SPH particles

Domain decomposition on 128 CPUs

SPH Parallel

0

100

200

300

400

2 4 8 16 32 64 128

CP

U T

ime (

ho

urs

)

Number of CPUs

15 days

17 hours

4 days

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Pre- and Post-Processing

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Modelling of Assemblies (Model Instancing) Instantiate entire models into the assembly of

another model

Instantiated model can contain any number of

part instances – dependent or independent,

native parts or orphan meshes

A model (sub-assembly) can be instantiated

any number of times in the main assembly

Input file written as a single large input file

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Meshing Enhancements New tool to copy Shell mesh from one geometry to

another

User specifies points on one or more loops to

define the mapping

Source and Target can be different, but must be

topologically similar

Source can be a selection of native or orphan

elements

Can be used at assembly level between part

instances

New automated mesh smoothing tool can be used to

fine-tune the mesh after copy

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Meshing Enhancements Verify Mesh dialog enhanced to permit multiple criteria

Abaqus 6.12 Abaqus 6.13

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Geometry Enhancements Mesh to Geometry enhancement

GUI option for stitch tolerance and surface fitting tolerance

Allows user to delay the stitching until required

Import part names from STEP files

Support picking methods via scripting

Faces by curvature, face angle

Edges by angle

Element faces by layer, face angle, limiting angle

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VCCT for Abaqus/Standard Fracture criteria contact interaction property enhanced

VCCT/Enhanced VCCT type of fracture criteria can be created

Surface to surface contact interaction enhanced to specify initially bonded node set of the slave surface

New option for Crack “Debond using VCCT” Activates the crack propagation capability between the two surfaces that are initially partially bonded

History output variables added DBS1i (i=1,2), CRSTS1i(i=1,3), ENRRT1i(i=1,3)

Field variables DBS1, CRSTS1, ENRRT1 are already supported

General Solution Control dialog box modified to support * Control, Type=VCCT linear scaling

Input File Reader supported for all keywords related to VCCT

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CAE Performance Enhancements

Writing large input files to remote drives

Import of large input files in Abaqus/CAE

Upgrade of old databases containing many parts

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Visualization of gravity waves using AQUA

Aqua loads are used to apply steady current, wave, and wind loading to submerged or partially submerged structures

Offshore piping installations

Analysis of marine risers

New capability in Abaqus/Standard and /Explicit to visualize the surface of gravity waves in 3D Aqua analyses

Visualization supports all waves types

*WAVE, TYPE=[STOKES, AIRY, GRIDDED, USER]

AQUA loaded structure

Surface element

mesh added for

visualization.

Surface

visualization

elements do not

affect the analysis.

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Enhancements in Linked Viewports Viewport rotation centers linked for better synchronized

view manipulations

Viewport annotation options applied to all the linked

viewports to reduce repetitive and redundant manual

operations

New View Cuts created in the current viewport will be

copied to all the linked viewports

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Composite Output in Element Orientation Option to plot the Layup Orientation, which is used as the reference

orientation, for all the plies in a composite section

Layup Orientation can be used for results transformation

The .odb file must contain the field ‘SORIENT’

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Boundary Conditions in /Viewer Enhanced support for more Boundary Conditions

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Multiphysics

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Electromagnetics Prism / Wedge Element – EMC3D6

Useful in modelling skin depth

Tet-to-brick transition, tet-to-tet transition

Permanent Magnets

* PERMANENT MAGNETIZATION

Linear/non-linear behaviour

Prescribed Motion

Current generated by motion of conductor through a

magnetic field

Uses existing *MOTION keyword

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EM + Structure co-simulation using Abaqus/Standard

Co-simulation between EM and structural procedures in Abaqus/Standard is now supported in v6.13

The Magneto-static and transient Electro-magnetic procedures can be coupled with Abaqus/Standard structural procedures

Coupling is one-directional EM procedure sends electromagnetic body forces (EMBF)

Body forces are integrated to concentrate nodal loads on the structural model.

Structural analysis computes displacements, but geometry of EM model is NOT updated

Keyword Usage: EM procedure *CO-SIMULATION REGION, TYPE=VOLUME, EXPORT

elset, EMBF

Keyword Usage: Structural Procedure *CO-SIMULATION REGION, TYPE=VOLUME, EXPORT

elset, CF

2 - Structural analysis

Force density

1 - Electromagnetic analysis

Map

forces

Deformed tube

PEEQ

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EM + Thermal co-simulation using Abaqus/Standard

Co-simulation between EM and thermal procedure in Abaqus/Standard is now supported in v6.13

Both transient and harmonic electromagnetic procedures can be coupled with Abaqus/Standard thermal procedures

Coupling is bi-directional

EM procedure sends volumetric joule heat (EMBJ)

Volumetric joule heat is converted to concetrate heat fluxes and applied on thermal model

Thermal analysis sends nodal temperatures

Keyword Usage: EM procedure

*CO-SIMULATION REGION, TYPE=VOLUME, IMPORT elset, NT

*CO-SIMULATION REGION, TYPE=VOLUME, EXPORT elset, EMBJ

Keyword Usage: Structural Procedure

*CO-SIMULATION REGION, TYPE=VOLUME, IMPORT elset, CFLUX

*CO-SIMULATION REGION, TYPE=VOLUME, EXPORT elset, NT

Current

coil

Joule heat

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CFD Steady State Solver

Hybrid FE/FV SIMPLE

Tet-to-brick transition, tet-to-tet transition

Turbulence Models New RANS model - SST variant of k-

Hybrid wall function

Heat Transfer Radiation and film boundary conditions

Conduction heat transfer within CFD

ALE Mesh Motion A new mesh smoother based on an implicit algorithm using a “matrix-free” method

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Enhancements in Isight 5.8 Authoring multi-user workflows

File Sets

Jobid & User Substitution

Application Components

CATIA V5 Support for Composite

Parameters

CATIA V5 Numerical Precision of model

Parameters

Results Visualization

Correlation Table

Min/Max Bars on History Table

Improved Array Graphs

SLM-SEE-Isight Integration

Completing the loop between SLM, SEE

and Isight

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File Sets Isight already supports arrays of files. These are static and each element of the array has to be explicitly defined

Allow dynamic arrays of files to be configured by defining a file location and file matching pattern

Allows users to easily configure workflows which are capable of handling varying number of files arrays

Use Cases:

Retrieve all .jpg’s in a subdirectory,

renaming them image1.jpg, image2.jpg,

etc.

Retrieve all files in a subdirectory that

contain the string “stress”

Retrieve all files in a subdirectory

associated with an Abaqus run (.cae,

.inp, .odb, etc.)

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System Generated substitutions Isight supports many keyword substitutions like {user}, {workid}, {rundir},

{localhost}, {jobid}, etc.

These keyword substitutions allow the content of a string to be changed at

runtime

Allows deployment of workflows to multiple user communities.

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CATIA V5 Component – Composite Parameter Support

Added support for the Isight parameterization of composite ply direction (ply angle)

Added support for the Isight parameterization of number of layers (number of plys) in the composite laminate

Tighter coupling between CAD and Isight reduces user errors and increases functionality

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CATIA V5 Component – Numerical Precision

In Isight 5.8, full precision of parameter values is maintained when passing

values between Isight and CATIA.

The component is able to resolve very small dimension changes.

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Correlation Table New visual which displays a heat map

of correlation values between selected

input and output parameters

User can select between Rank or

Linear correlation values

Helps user to quickly identify highly

correlated input-output pairs which

helps in understanding the behaviour of

the system.

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Min/Max Bars on History Table Grey min/max bars represent parameter value as a fraction of the range of values in that column

Real time update of data as execution progresses.

User can identify quickly whether a parameter belongs to upper/lower/mid range of the limits specified.

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Improved Array Graphs In 5.8 it is possible to create array graphs by taking slices of two different arrays

Eg: given “displacement versus time” and “force versus time” data, easily graph “force versus displacement”

Supports array concatenation

Greatly simplifies post processing of Abaqus component history arrays

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SLM-SEE-Isight Integration With this release we

have closed the loop

between the life cycle

management and

complex simulation

workflows.

Isight Simflow Activity

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SLM-SEE-Isight Integration New SLM-SEE integration allows execution of complex Isight simflows from SLM

SLM users can:

Import Isight simflows (.zmf files)

Create activities

Change values of Isight parameters

Map SLM managed documents to file parameters

Review results

Execute Isight simflows through the Execution Engine (SEE)

Isight/SEE users can:

Select a PLM document as the input source or output destination for simflow parameters.

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A Technology Fest: What’s New with Abaqus and Isight

Getting to the right answer with advanced

multiphysics capabilities

New modelling techniques that push the

scope of what Abaqus can do

Isight driven simulation workflows simpler

to setup and more efficient

Continued focus on robustness,

automation and performance

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Equipment Design Demo in Abaqus/CAE

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