multiphysics in abaqus 6.12

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Multiphysics in Abaqus 6.12

Discover New Simulation Possibilities

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Contents

Structural Mechanics

Electromagnetics

Computational Fluid Dynamics

Co-Simulation Engine

Example

Conclusion

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Edge-Surface Contact

Edge-surface contact is now activated by

default in Standard

Shell perimeter edges and feature edges

Increases contact robustness “out-of-the box”

Snap fit example

Abaqus 6.11

• Requires hundreds of increments with

supplementary node-surface contact pair

Abaqus 6.12:

• Completes in only 29 increments

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Surface Smoothing Enhancements

Surface smoothing is now available in Explicit

Previously available in Standard for spherical and

cylindrical geometry

Toroidal smoothing introduced in both Standard &

Explicit

No smooth Smoothed

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Thermal Interaction with CEL

Extended CEL to thermal stress simulation

with contact interactions

Complements thermal stress element introduced

in Abaqus 6.11

Applications include forging, mold filling,

manufacturing processes, …

Hot forging

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SPH Enhancements

Automatic conversion from conventional elements to SPH particles

Criteria includes time, stress, strain, user

Greatly simplifies SPH modeling

Ballistic impact examples

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More accurately capture the time-dependent

behavior of materials such as polymers and rubber

Based on parallel-network approach

Available in Standard for 3D continuum elements

with isotropic behavior

Nonlinear Viscoelasticity

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Adaptive Mesh Refinement for CEL

Automatic single-level refinement of Eulerian elements

Provides improved accuracy and

performance

Refinement criteria include material

boundary, contact, plastic strain,

and density

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Fracture Mechanics

XFEM

Support for axisymmetric elements

Performance improvements

VCCT

Unstable crack growth performance improved

Composites with large ductile fracture

resistance

0

20

40

60

80

100

120

Multiple node release

One node release

Tim

e (

in s

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on

ds

)

Single vs. multiple node release

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GPU Acceleration of Direct Sparse Solver

GPU acceleration now works with

DMP and multiple GPUs

Limited to SMP and single GPU in

Abaqus 6.11

Further improved performance for

large problems where equation

solver dominates

1

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

1.5 1.5 3.0 3.4 3.8

Sp

ee

d u

p v

s.

CP

U o

nly

Number of Equations (millions)

Abaqus 6.12 Multi GPU Execution 24 core 2 host, 48 GB memory per host

1 GPU/Host

2 GPUS/Host

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Input File Processing Performance

Expectations for Abaqus 6.12

1.2 minute per million DOF

0.35 GB per million DOF

Initial DMP of batch Pre

Targeting memory reductions

0

50

100

150

0 60 120 180

Ba

tch

Pre

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(m

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tes

)

Millions of DOF

Abaqus 6.10EF

Abaqus 6.11

Abaqus 6.12

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0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

Abaqus 6.11 (Only Full Recovery available)

Abaqus 6.12 (Full Recovery)

Abaqus 6.12 (Selective Recovery)

3.95 3.85 1.70

13.61

0.07

0.05

Wal

l-Ti

me

(h

rs.)

Frequency Substructure Generate

AMS-based Substructure Generation

~10x

13M DOF powertrain model with 15kHz

maximum frequency—substructure size 2143

(1188 retained DOFs + 955 eigenmodes)

Novel substructure generation algorithm

provides significant performance gains

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Review

SCC 2011 Abaqus 6.11

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Magnetostatic Procedure

Solves for magnetic field produced by

direct current

Applications include actuators, magnetic

inspection, and magnetostriction TEAM 13 Benchmark

Coil with DC

Plate Channels

Symmetry

plane

Magnetic field in air Flux density in channels and plate

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Transient Low-Frequency Procedure

Solves for magnetic and electric fields produced by

time varying current

Applications include EM forming, transformers,

nondestructive examination

Magnetic pulse forming Induced current

density

Force density

Coil with

current Aluminum

tube

Electromagnetic analysis 1

Map

forces

Structural analysis 2

Deformed tube

• EM force is sequentially

mapped onto structural mesh

• 1/8th symmetry

• Decaying AC current

• Rate-dependent plasticity PEEQ

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Abaqus 6.11

(linear)

Magnetic Material Behavior

Nonlinear B–H curve can capture saturation

Suitable for “soft” magnetic materials

Response can be isotropic or orthotropic

Applications include electromagnets and

transformers

Flux Density B

Magnetic Field

H

Saturation

Abaqus 6.12

(nonlinear)

Without saturation With saturation

Max EMB:

2.44

Max EMB:

1.84

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Performance

All electromagnetic procedures now

support DMP parallel processing

TEAM 13 Benchmark • 106,570 DOF

• Intel 2.67GHz, 8 cores, 48 GB

3.3× faster

on 4 cores

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Computational Fluid Dynamics

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Review



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Implicit Advection

Implicit treatment of convective transport terms

Relaxes mesh-dependent CFL condition

March to steady state much faster

6.11 6.12

CFL 0.45 50

dt 8.8 × 10-6 9.8 × 10-4

increments 34,000 (est.) 340

wall time (min) 2,400 (est.) 46 min

35° Ahmed body

Cross-section of

hex-dominant 5

level mesh

• 1.6M elements, 16 cores

• Spalart-Almaras turbulence

• Experiment: Cd = 0.257

• Imp. adv.: Cd = 0.269

52× faster!

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Porous Media

Computationally efficient technique for

modeling flow through porous media

Based on Darcy-Brinkman-Forchheimer

equations

Isotropic permeability and heat transfer

Applications include packed beds, filters,

tube banks, etc.

Inlet Outlet

Porous media

Inlet

Outlet

Substrate

Pressure

Filter

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Porous Media Example

Velocity

Porous media

diffuses inflow

Copper conducts

heat across throat

Temperature

Cold air

Hot air Copper diffuser 85% porosity

Venturi with porous diffuser

Free inflow With diffuser

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Additional Enhancements

Non-Newtonian Viscosity

Model shear behavior of fluids such as

blood, paint, slurries, molten polymers, etc.

A variety of popular models are available

User-defined subroutines

Element face pressure and velocity

Written using C programming language

Surface Name: “inlet”

vx : User specified

Blood flow through

an aortic aneurism

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Turbulence Modeling

Existing turbulence models include:

RANS: Spalart-Allmaras, RNG k-e

LES: Implicit Large Eddy Simulation

Work-in-progress for a future release

Detached Eddy Simulation (DES)

captures individual eddies

Spalart-Allmaras

DES

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Software technology that enables

run-time coupling between multiple

solvers

Used by SIMULIA and partners for

several years

Co-simulation API is now available to

end-users

Abaqus/Standard and CFD

Co-Simulation Engine (CSE)

Abaqus/Standard and

Abaqus/Explicit Abaqus/Standard and

STAR-CCM+

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Bringing it all together Solenoid Valve Example

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Solenoid Valve Example Problem Description

Solenoid valve schematic

Adapt a relatively inexpensive

solenoid for use in a precision

fluid metering application.

Plunger

Valve Body

Spring

Lead Wires

Coil Windings Solenoid

Outlet Inlet

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Solenoid Valve Example Solution Approach

Fluid model

Structural model EM model

Magnetostatic Analysis

Sequence of jobs to obtain plunger force as

a function of location

FSI Analysis

Structural Dynamics Incompressible CFD

High Reynolds number flow

with turbulence

Sensor/actuator applied to

plunger

1

2

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Solenoid Valve Example Results

Closed

Half open

Fully open

Magnetic force density in

the plunger

Velocity streamlines

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Conclusion

Abaqus 6.12 is the strongest release ever!

Structural mechanics

Electromagnetics

Computational fluid dynamics

Co-Simulation engine

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multiphysics in abaqus 6.12

Documents