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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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Structural Mechanics
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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
ec
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
wa
ll t
ime
(m
inu
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 frequencysubstructure size 2143 (1188 retained DOFs + 955 eigenmodes)
Novel substructure generation algorithm
provides significant performance gains
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Electromagnetics
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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 BH 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
SCC 2010 Abaqus 6.10
SCC 2011 Abaqus 6.11
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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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Co-Simulation Engine
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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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