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Abaqus 2016 Overview

SIMULIA Technical Meeting, Pittsburgh, PA

March 31, 2016

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Agenda

What’s New in the Abaqus 2016 Release

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Advances in general contact

Surface-to-Surface (primary formulation)

Edge-to-Surface (supplementary formulation)

Edge-to-Edge (supplementary formulation)

Improved heuristics for automatically transitioning between different contact formulations can significantly improve convergence behavior in Abaqus/Standard

New vertex-to-surface supplementary formulation improves contact behavior at convex corners.

Abaqus 2016

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Advances in general contact

Individual edges can be involved in multiple contacts

Not in contact

on this side Older releases Abaqus 2016

Example: Shell wedge bearing down on a beam pinned at its ends

Abaqus 2016

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Abaqus 2016

Contact output for Abaqus/Explicit

CDISP “family” of output variables added

COPEN, CSLIP1, CSLIP2

New member of this family: CSLIPEQ (total slip length)

CTANDIR output added

CTANDIR1, CTANDIR2

Vector output of t1 and t2 local tangent directions

Slip rate output variables added

CSLIPR1, CSLIPR2, CSLIPRMAG

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Abaqus 2016

Contact output for Abaqus/Explicit

w

CSTATUS output added

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Linearized contact

Can efficiently address a class of problem where the only

source of nonlinearity is frictionless small sliding contact.

Works best for small & medium size problems.

Initially available from select 3DEXPERIENCE applications

Model DOF Wall time

(SDI) Wall time

(Linear) Speedup

Model-1 25,892 7 3 2.33

Model-2 54,127 74 13 5.69

Model-3 86,379 371 25 14.84

Model-4 213,708 500 51 9.80

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CAD-enhanced contact

Geometric correction technique has been extended

to more general surface shapes

Provides both accuracy and robustness benefits

Initially available from select 3DEXPERIENCE

applications

With corrections Without corrections

Example: Two parts compressed together

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Abaqus 2016

Pyramid element for stress analysis

Compatible transition between tet and hex mesh

Highly requested by customers

Multiphysics elements

Coupled temperature-displacement (CTD)

Coupled pore pressure-displacement (CPD)

Coupled pore pressure-temperature-displacement (CPTD)

Finite sliding thermal contact

Expanded element library

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Fluid pipe/connector elements based on Bernoulli’s equation

can model 1D fluid flow.

Valid for incompressible steady-state conditions

Pressure, flow rate, & gravity loading

Can model losses arising from friction & pipe joints

Can couple with 3D pore pressure elements

Expanded element library

“copper fittings” by Torsten Bätge,

Released under Creative Commons Attribution-Share Alike 3.0 Unported license.

Original URL: http://en.wikipedia.org/wiki/File:Kupferfittings_4062.jpg

Injection flow or pressure

applied to the pipe element

Tie constraint between

pipe and formation

Pore pressure

Abaqus 2016

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Abaqus 2016

Rigid body rotation of tied solid surfaces Abaqus/Standard will by default account for rotations of

offsets in solid mesh ties

Original configuration Final configuration

Abaqus 6.14

Abaqus 2016

Similar capability is implemented in

Abaqus/Explicit within the framework

of surface-based cohesive behavior.

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Rate dependent nonlinear kinematic hardening

plasticity

Orthotropic clay plasticity for geomechanics

applications

Import of Johnson Cook plasticity for spring back

after high rate impact events

Material modeling enhancements

Fig 1 Initial configuration

Fig 2 End of impact event

Fig 3 Final configuration

Abaqus 2016

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13.7M DOF Full Vehicle Model (5,177 Modes) on 20-Core Ivy Bridge, 192 GB Memory

GPU Acceleration of AMS

2x K40m Nvidia Cards

1.00 1.10

1.81

1.00 1.07

1.43

1.00 1.05

1.27

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

1.80

2.00

0

200

400

600

800

1000

1200

1400

Abaqus 6.14-3 Abaqus 2016 Abaqus 2016 + 2 GPUs

Spe

ed

up

Fac

tor

Elap

sed

Tim

e (

sec.

) AMS Solver

AMS Driver

STD

AMS Solver Speedup

AMS Driver Speedup

STD Speedup

Memory usage: 98GB 73GB 87GB

Abaqus 2016

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Full car NVH simulation

10.7M DOFs

90 load cases

5964 modes (up to 550 Hz)

441 frequency points (10Hz – 450 Hz)

566 435 388

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

1 2 4 8 16

Ela

pse

d T

ime

(sec

.)

Number of Cores

Performance data

6.13-5

6.14-3

2016 SMP

2016 GPU

Intel Xeon E5-2670 (Sandybridge)

2 × 8 cores, 128 GB RAM

Tesla K20Xm Nvidia cards

GPU Acceleration of Steady State Dynamics Abaqus 2016

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Abaqus 2016

Tracer particles follow the material motion in CEL simulations and allow extraction of

material point results.

Tracer particles for CEL

Tank sloshing example w/ tracer particles

Model With tracers

(seconds)

Without tracers

(seconds)

Blast (294k elements, 3400 tracer particles)

1607 1578

Sloshing (13k elements, 2940 tracer particles)

1080 862

Flat airbag (52.5k elements, 1440 tracer particles)

602 582

Minimal impact on performance

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Particle generation can now be based on:

Evolving inlet surfaces

User-specified size distribution

User-specified mass flow rate

User-specified inlet velocity

DEM particle generation

0

5

10

15

20

25

30

35

40

45

50

0 0.01 0.02 0.03 0.04 0.05 0.06

Co

un

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Particle Size

Specified vs. Observed Distribution

Specified Distribution Particle Generation

Screen Sorter

Expanding inlet Rotating inlet Moving inlet

Abaqus 2016

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Simplified specification of Hertz

normal contact between particles

Adhesive contact based upon the

Johnson-Kendall-Roberts (JKR)

model has been introduced

DEM particle interactions

Comparison of mixing process with and without adhesion

Abaqus 2016

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New

Old

Improved treatment of SPH boundaries Introduction of virtual particles improves accuracy of

SPH wall conditions.

Boundary wall

i Virtual

particles

Fluid

particles

Abaqus 2016

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Uniform grid SPH particle generation Generating SPH particles based on uniform background grid instead of parent

element can improve accuracy of results.

Uniform grid Parent elements

Abaqus 2016

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Connectors, connector sections, and contact interactions are now

copied from instanced models

Model instancing Abaqus/CAE 2016

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Generate cohesive elements

through Mesh Edit tool

Select geometry faces or element

sets/surfaces

Creates sets for newly created

nodes/elements

Meshing Abaqus/CAE 2016

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Abaqus/CAE 2016

Mid-side node placement

New plug-in available in the

Mesh Module

Selection based on sets,

surfaces, or viewport

picking

Undo/Redo enabled

Meshing

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Abaqus/CAE 2016

Fixed Copy/Paste issues in past releases

Copy text from prompt area to clipboard

Copy content from GUI widgets and paste

the contents

… after closing the widget window!

Default font and glyph size modified

Default font size for legend, title block, state

block, x-y plots is increased to 12

Default glyph size for Viewer and CAE

entities is increased from 6 to 12

Usability

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Abaqus/CAE 2016

Viewport control

One click – link/unlink all

viewports

Separate control for Linked

Viewport Manager

Links all options by default

Usability

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Expand viewport to Full Screen (F11)

F11 toggles back to default view

Freebody usability

Highlights the location of user-defined

summation points

Improved default colors of Moment arrows

Usability Abaqus/CAE 2016

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Abaqus/CAE 2016

Update min/max location according to view cut

View cut with updated min/max location Min/max location before view cut

Results visualization

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Use nodal coordinates as

x-value when creating XY

Data from Path

Results visualization Abaqus/CAE 2016

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