Ansys Mech Technology v11
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Transcript of Ansys Mech Technology v11
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© 2007 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary
ANSYS Mechanical Technology
New Feature Update Version 11…
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© 2007 ANSYS, Inc. All rights reserved. 2 ANSYS, Inc. Proprietary
Mechanical Technology Status
• Release v11– State-of-the-art ANSYS technologies
• Released in Feb of 2007
– Major analysis initiatives• Simulation analysis type organization• Flexible and rigid multi body dynamics• Advances in materials, nonlinear solution mechanics, and
multiphysics• Explicit dynamics
– New edition now available (Sept 2007)• Network installation• Windows Vista• Performance improvements
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© 2007 ANSYS, Inc. All rights reserved. 3 ANSYS, Inc. Proprietary
Mechanical Technology Status
• Future releases– Advancing CAE integration
• Ease-of-use• Multiphysics analyses• Geometry integration• Mesh generation breadth and robustness
– Mission• Intuitive and comprehensive• Engineering Simulation
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© 2007 ANSYS, Inc. All rights reserved. 4 ANSYS, Inc. Proprietary
Presentation Boundaries
• ANSYS Workbench– CAE Platform for all ANSYS technologies looking forward
• Technologies covered in this presentation– Mechanical– Multiphysics– Explicit dynamics– High performance computing– Parametric analysis
• Technologies covered in other presentations– CAD connectivity– Geometry modeling– Mesh generation– Fluid dynamics
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© 2007 ANSYS, Inc. All rights reserved. 5 ANSYS, Inc. Proprietary
Agenda
• Multiphysics Solutions– Coupled Physics– EMAG
• Explicit Solutions– AUTODYN in Workbench
• Offshore Solutions– ASAS, AQWA, ANSYS
• High Performance Computing– Solver Speed-up
• Workbench/Simulation– Simulation– Parameter Manager– DesignXplorer– FE Modeler
• Mechanical Solutions– Multi Body Dynamics*– Elements– Contact– Materials– Dynamics– Thermal
* Major initiative across the technology
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© 2007 ANSYS, Inc. All rights reserved. 6 ANSYS, Inc. Proprietary
Workbench/Simulation
Back to Agenda
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© 2007 ANSYS, Inc. All rights reserved. 7 ANSYS, Inc. Proprietary
Workbench/Simulation New Analysis Typing
Analysis types and linking
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© 2007 ANSYS, Inc. All rights reserved. 8 ANSYS, Inc. Proprietary
Workbench Symmetry• Automated symmetry condition
from DM to Simulation– Symmetry– Anti-symmetry
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© 2007 ANSYS, Inc. All rights reserved. 9 ANSYS, Inc. Proprietary
Workbench/Simulation New Part Stiffness
Rigid and flexible parts
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© 2007 ANSYS, Inc. All rights reserved. 10 ANSYS, Inc. Proprietary
Workbench/Simulation New Connections
Springs and joints
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© 2007 ANSYS, Inc. All rights reserved. 11 ANSYS, Inc. Proprietary
Workbench/Simulation New Model Configuration Setting
Joints used to position geometry before analysis
Applicable to all analysis types (i.e. joint can be deleted)
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© 2007 ANSYS, Inc. All rights reserved. 12 ANSYS, Inc. Proprietary
Workbench/Simulation Joint DOF Checker• Estimates free degrees of freedom of the model,
potentially predicting over constraint• Displayed in worksheet of Connections
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© 2007 ANSYS, Inc. All rights reserved. 13 ANSYS, Inc. Proprietary
Workbench/Simulation Initial Contact Information
Initial contact result contours are also available
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© 2007 ANSYS, Inc. All rights reserved. 14 ANSYS, Inc. Proprietary
Workbench/Simulation New PSD Analysis
PSD analysis in Simulation
PSD load specification inEngineering Data
G Acceleration vs. Freq
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© 2007 ANSYS, Inc. All rights reserved. 15 ANSYS, Inc. Proprietary
Workbench/Simulation New Forms for Loads
Constant, tabular, function loads over load steps and time
RMB to activate or deactivate
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© 2007 ANSYS, Inc. All rights reserved. 16 ANSYS, Inc. Proprietary
Workbench/Simulation New Forms for Loads
• Loads as a function of time/step– Tables
• Entries typed in• Entries copy and paste to and from Excel
– Functions ( example: “100*sin(5*time)” )• Standard math operators +,-,/,*,^• Trigonometric functions “sin”, “cos”, “asin”, …• Name “time” is a reserved to represent time in functions
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© 2007 ANSYS, Inc. All rights reserved. 17 ANSYS, Inc. Proprietary
Workbench/Simulation New Types of Loads
• Joint condition– Displacement– Rotation– Velocity– Acceleration– Force– Moment
• Line pressure• Hydrostatic pressure• Elastic support
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© 2007 ANSYS, Inc. All rights reserved. 18 ANSYS, Inc. Proprietary
Workbench/Simulation New Forms of Results
Time history/steps post-processing
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© 2007 ANSYS, Inc. All rights reserved. 19 ANSYS, Inc. Proprietary
Workbench/Simulation New Report Generator
• “Scrapes” Workbench GUI to generate report
• Reflect exactly all analysis definitions
• Primarily tables and figures– Less text than
before
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© 2007 ANSYS, Inc. All rights reserved. 20 ANSYS, Inc. Proprietary
Workbench/Simulation Probes, Charts, Tables
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© 2007 ANSYS, Inc. All rights reserved. 21 ANSYS, Inc. Proprietary
Workbench File Management
Simulation post processing depends on ANSYS results file
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© 2007 ANSYS, Inc. All rights reserved. 22 ANSYS, Inc. Proprietary
Workbench/Simulation Legend
• Context menus• Named Legends
– Reuse• In-place editing• Display options• Positioning
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© 2007 ANSYS, Inc. All rights reserved. 23 ANSYS, Inc. Proprietary
Workbench/Simulation Legend
Movable, sizable, color changeable
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© 2007 ANSYS, Inc. All rights reserved. 24 ANSYS, Inc. Proprietary
Global Parameter Manager
Back to Agenda
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© 2007 ANSYS, Inc. All rights reserved. 25 ANSYS, Inc. Proprietary
Parameter Manager General Information
• Displays all parameters from Workbench modules
• View input and output parameters, change input parameter values and rerun the complete analysis to generate new output parameter values
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© 2007 ANSYS, Inc. All rights reserved. 26 ANSYS, Inc. Proprietary
Parameter Manager Expressions
• Expressions – Create constant values (e.g. Pi, e)– Combine input parameters and/or constant
values
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© 2007 ANSYS, Inc. All rights reserved. 27 ANSYS, Inc. Proprietary
DesignXplorer
Back to Agenda
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© 2007 ANSYS, Inc. All rights reserved. 28 ANSYS, Inc. Proprietary
DesignXplorer
• Sampling Methods (Extend DOE)– Optimal Space Filling Design (new at v11)– Central Composite Design
• Meta Models (Improved Fittings)– Kriging (new at v11)– Non Parametric Regression (new at v11)– Neural Network (new at v11, beta)– 2nd Order Polynomial
• Ability to refit data• Ability to add additional data points• Weighted Latin Hypercube
• Works with CFX
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© 2007 ANSYS, Inc. All rights reserved. 29 ANSYS, Inc. Proprietary
DesignXplorer Excel Import Wizard
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© 2007 ANSYS, Inc. All rights reserved. 30 ANSYS, Inc. Proprietary
DesignXplorer Excel Import
• Data from Excel into DesignXplorer
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© 2007 ANSYS, Inc. All rights reserved. 31 ANSYS, Inc. Proprietary
DesignXplorer Excel Export Wizard
• Choose the file and a name for the sheet• Export in row major or column major format
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© 2007 ANSYS, Inc. All rights reserved. 32 ANSYS, Inc. Proprietary
DesignXplorer Excel Export
• Data from DesignXplorer in Excel
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© 2007 ANSYS, Inc. All rights reserved. 33 ANSYS, Inc. Proprietary
Parameter Manager Running Simulation from Excel
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© 2007 ANSYS, Inc. All rights reserved. 34 ANSYS, Inc. Proprietary
FE Modeler
Back to Agenda
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© 2007 ANSYS, Inc. All rights reserved. 35 ANSYS, Inc. Proprietary
FE Modeler Geometry Creation from FEA!
Initial Mesh
Initial Configuration in FE Modeler
Design Simulation Results
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© 2007 ANSYS, Inc. All rights reserved. 36 ANSYS, Inc. Proprietary
DesignXplorer Mesh Morhping Geometric Parameters - Parametric Stress Variations!!
Thickness increase
Diameter decrease
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© 2007 ANSYS, Inc. All rights reserved. 37 ANSYS, Inc. Proprietary
FE Modeler ABAQUS/Nastran Support
• ABAQUS Support– Three dimensional springs are now supported– The ABAQUS property keyword *DASHPOT is now supported– FE Modeler now recognizes ABAQUS gasket elements– Element and node parameters are now supported for the ABAQUS
general keyword *SURFACE
• NASTRAN Bulk Data Support– When importing a NASTRAN file, FE Modeler now supports an
element-level orientation angle for composite shell elements. When exporting this data, FE Modeler uses an undocumented field on the SECCONTROLS command.
– NASTRAN CBEND Element Card now supported– NASTRAN PBEND Property Cards now supported
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© 2007 ANSYS, Inc. All rights reserved. 38 ANSYS, Inc. Proprietary
Multi Body Dynamics
V11Major Initiative
Back to Agenda
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© 2007 ANSYS, Inc. All rights reserved. 39 ANSYS, Inc. Proprietary
Multi Body Dynamics
• Expansion of ANSYS Technology– Workbench/Simulation
• New analysis types (rigid dynamics, flexible dynamics)• Additional connections, loads, and results
– Core solver enhancements• Large rotation, large deflection, time stepping, etc.• Part interactions (joints, springs, contacts)
• Applicability – Rigid, flexible, and combined rigid and flexible
dynamic models• User benefits
– Ease-of-use in single user interface
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© 2007 ANSYS, Inc. All rights reserved. 40 ANSYS, Inc. Proprietary
Multi Body Dynamics
• Technology advances– Joints, masses, contact, and rigid representation enhancements
made to existing core solvers– New rigid body solver developed (kinematic and dynamic)– Implemented with existing Workbench principles (e.g. associative
to geometry, report generation)
• Engineering outcome– New part connections (joints, springs, in addition to contact)– Model “assembly” by configuring joints– Loads as a function of time– Common analysis setup and results processing which is
independent of solver type– Results, including joint and spring quantities, as a function of time
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© 2007 ANSYS, Inc. All rights reserved. 41 ANSYS, Inc. Proprietary
Multi Body Dynamics Rigid Solver
• New technology– Rigid solver
• Benefits of combined technologies– Analysis speed
• Rigid solver is fast and accurate for essentially rigid mechanisms
– Accuracy• Flexible solver is often appropriate since most real world
problems exhibit some flexibility– Emphasized ease-of-use
• One user interface with rigid and flexible capabilities• Leverages strengths and minimizes weaknesses• Simulations are more productive• Can freely change between rigid and flexible representation
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© 2007 ANSYS, Inc. All rights reserved. 42 ANSYS, Inc. Proprietary
Multi Body Dynamics Rigid Solver• New ANSYS rigid dynamics solver
– Very fast (via rigid abstraction rather than mesh)– Solve time typically measured in seconds, not minutes
• Used to study a only completely rigid mechanisms– All parts assumed infinitely stiff– All part interaction via defined joints– No contact
• Add-on License for • ANSYS Structural• ANSYS Mechanical• ANSYS Multiphysics
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© 2007 ANSYS, Inc. All rights reserved. 43 ANSYS, Inc. Proprietary
Multi Body Dynamics Flexible Solver
• Enhancements– New joint options for MPC184– large rotations improved in
transient dynamic analyses– HHT time integration improved– Rigid parts by MPC contact– Rigid contact improved– CMS extended to static,
transient, harmonic, spectrum
• Applications– Model with rigid and flexible parts, contact
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© 2007 ANSYS, Inc. All rights reserved. 44 ANSYS, Inc. Proprietary
Multi Body Dynamics Joint Types
Revolute Cylindrical
Translational Slot
Spherical
Planar
Universal
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© 2007 ANSYS, Inc. All rights reserved. 45 ANSYS, Inc. Proprietary
Multi Body Dynamics Examples Multi Body Dynamics Examples
Overhead Valve Engine
Force in automotive suspension ball joint
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© 2007 ANSYS, Inc. All rights reserved. 46 ANSYS, Inc. Proprietary
Elements
Back to Agenda
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© 2007 ANSYS, Inc. All rights reserved. 47 ANSYS, Inc. Proprietary
Elements Solid-Shell Element Analysis
Automated/manual thin shell meshing with solid-shell elements:
– No need for mid- surfacing
– Non-uniform thickness handling
Eight node SOLSH190 meshed with non-uniform thickness
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© 2007 ANSYS, Inc. All rights reserved. 48 ANSYS, Inc. Proprietary
Elements New Higher Order Shell
• SHELL281 based on SHELL181 framework and combines capabilities of existing composite shell elements
• May be used in 8 noded or 6 noded forms
• Capabilities– Finite strain/large rotation – All materials available– Layered composite and sandwich
shells thru shell sections– Mass inertia, Coriolis damping
terms
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© 2007 ANSYS, Inc. All rights reserved. 49 ANSYS, Inc. Proprietary
Elements New Rebar/Reinforcement
• REINF265 (3-D smeared reinforcement)– Large deflection, finite strain– Up to 250 layers– All material properties of current generation elements
apply– 3D visualization in graphics– Base elements can be SOLID185, SOLID186,
SOLID187, SOLSH190, SHELL181, SHELL281
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© 2007 ANSYS, Inc. All rights reserved. 50 ANSYS, Inc. Proprietary
Elements Smeared Reinforcement
• Tire analysisOuter Layer of the tire made of Nylon Material
Middle layer of the Tire made of Steel material
(Pink color)
Inner layer of the Tire made of
Polyester Carcass (Red color)
Rim
Representative Road surface
Tire
Predicted elastic strains
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© 2007 ANSYS, Inc. All rights reserved. 51 ANSYS, Inc. Proprietary
Elements Layered Solids for Composites • New layered option for SOLID185
– Implement with enhanced strain and mixed u/P formulation
– Integration with FiberSIM
Contact
Bonded Contact
F
Stringer Web
Stringer Flange
Skin
Composite lay-up definition
Example: composite stiffened panel
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© 2007 ANSYS, Inc. All rights reserved. 52 ANSYS, Inc. Proprietary
Elements New User Element
• USER300– Defined through API (reduces need to know
ANSYS software architecture)– Independent of ANSYS database and file
structure– Access to all ANSYS structural materials
routines– Can have its own
– DOFs– Element convergence criterion– Cutback control
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© 2007 ANSYS, Inc. All rights reserved. 53 ANSYS, Inc. Proprietary
Elements New Joint Types
• MPC184– Point-in-plane joint– Prismatic (translation)– Cylindrical joint– Planar joint – Weld joint – Orient joint
• Supports– Linear/nonlinear large
rotation– Linear/nonlinear
stiffness and damping– Hysteretic frictional– Stops and locks on
the free degrees of freedom
– Actuation of the joint– Static and transient
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© 2007 ANSYS, Inc. All rights reserved. 54 ANSYS, Inc. Proprietary
Elements Nonlinear Stabilization
• Nonlinear Stabilization– Handles local instability for nonlinear static analyses
• Material softening• Wrinkling• Deformed region unconstrained
– Adds numerical damping with dashpot at each node
• Applications– Local buckling and post local buckling within static analysis– Simulates global buckling, snap-through situations where arc-
length is not appropriate – Overcomes convergence difficulties in general
• Options– Control available (on/off) during each load step and restarts
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© 2007 ANSYS, Inc. All rights reserved. 55 ANSYS, Inc. Proprietary
Elements Nonlinear Stabilization
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© 2007 ANSYS, Inc. All rights reserved. 56 ANSYS, Inc. Proprietary
Contact
Back to Agenda
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© 2007 ANSYS, Inc. All rights reserved. 57 ANSYS, Inc. Proprietary
Contact Debonding• Applications
– Delamination of composites– Decohesion of surfaces bonded with adhesives,
stitches, ...• Primary interest in tension/opening• Separation behavior is described by a traction
separation law • Provides a capability for separation/opening of bonded
contact that is– independent of mesh– numerically stable– compatible with existing models with bonded contact
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© 2007 ANSYS, Inc. All rights reserved. 58 ANSYS, Inc. Proprietary
Contact Debonding
• Used with 2D and 3D contact elements• Supports augmented Lagrange and penalty methods• Can be used to model failure modes
– Mode I (normal) – Mode II (tangential)– Mixed mode (mode I and mode II)
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© 2007 ANSYS, Inc. All rights reserved. 59 ANSYS, Inc. Proprietary
Contact 3-D Line / Surface
Technology Node-to- Node
Node-to- Surface
Surface-to- Surface
Line-to- Line
Line-to- Surface
Sliding SMALL LARGE LARGE LARGE LARGEPure Lagrange Y Y Y Y Y
Augmented Lagrange Y Y Y Y YLagrange (Normal)/Penalty (Tangent)
Y Y Y Y Y
MPC Y Y Y YContact Stiffness SEMI-AUTO SEMI-AUTO SEMI-AUTO SEMI-AUTO SEMI-AUTO
Lower-Order Y Y Y Y YHigher-Order Y (2D) Y Y YRigid-Flexible Y Y Y Y Y
Flexible-Flexible Y Y Y Y YThermal Contact Y Y Y Y
Electric/Magnetic Contact Y Y Y Y
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Contact Line/Line & Line/Surface
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Contact For Rigid Body
• Rigid body modeling via MPC• Rigid contact uses augmented Lagrange or penalty
methods• Large deformation based MPC’s
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Materials
Back to Agenda
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Materials Gurson Model (Damage Plasticity)
• Process of ductile metal damage and failure includes void nucleation, growth, and coalescence
• Void growth and nucleation are strongly dependent on stress field
• Macroscopic behaviors can be predicted from development of damage at microscopic level
• May be combined with multi-linear, bilinear, and nonlinear isotropic plasticity
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Materials Anisotropic Hyperelasticity
• Applicable to plane stress state for:– SHELL181– SHELL281– PLANE182 (plane stress)– PLANE183 (plane stress)
• Application– Polymers – Polymer composites– Biomaterials
A
B
C
A
B
C
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Materials Granular and Powder
• Cap Drucker-Prager plasticity model applicable to – Simulation of granular materials such as soils– Powder compaction simulation– Pressure dependent plasticity of polymers
• Applicable to 2D and 3D• New addition to the existing Extended Drucker-Prager
model– Introduces cap for both tension and compression– Includes cap hardening– Includes shear envelope hardening
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Materials Soil Excavation Analysis
Embankment simulationsettling of soil(i.e. displacement)
Plastic Strain
Without Reinforcements
With Reinforcements
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Materials Fracture Mechanics
• Calculations such as J Integrals• Elements supported
– 2D and 3D solids (no composite sections at v11)
• Material options– Linear elasticity– Elastic-plastic material– Finite deformation– Mode I crack only (at v11)
• J-Integral calculation during solution• Pre-processing for crack setup
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Materials Fracture Mechanics
• Pressurized pump housing with through crack
Crack
0
0.04
0.08
0.12
0.16
0 1 2 3 4
Path 1Path 2Path 3Path 4Path 5
Inner surface
Outer surface
J Integral calculations
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Materials Initial State
• Applications in general– Residual stress/strain analysis
• Structure components subject to external/internal loading beyond the elastic limit, the components will accrue some permanent deformation after the loading is removed
– Pre-stressed reinforcement • A technique widely used in industrial applications to achieve
special mechanical performance
– MEMS (static, continues from previous state of stress)• New procedure for definition
– Replaces initial stress command (ISTRESS) with initial state (stress only at v11)
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Materials Initial State
• New initial state procedure (INIST)– Ease-of-use
• Repeatable command• No element dependency
– Data definition• Element based, material based• Coordinate system (where applicable)
– Input method• Command or by a file (flexible and well formatted)
– Support most ANSYS analyses• Static, transient, modal, buckling, harmonic
– Elements supported• 180, 181, 182, 183, 185, 186, 187, 188, 189, 190, 208, 209, 281
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Materials Initial State Example
Pre-Stressed beam with material based initial stress definition
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Explicit Analysis
Back to Agenda
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Explicit Dynamics Solutions
• ANSYS LS-DYNA– LSTC Solver technology– Long-term partnership
• ANSYS AUTODYN – New to Workbench at 11.0– ANSYS proprietary technology– Available in Workbench at 11.0
• Complementary Products– Different Application Focus
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Explicit Dynamics AUTODYN 11.0 Development
• NEW - Workbench based Explicit Dynamics option
• Data sharing with other Workbench Applications
– DesignModeler– Meshing
• Default settings for Explicit– FEModeler– Advanced Meshing
• Links to Geometry– CAD based– DesignModeler created
• Persistent Parametric Model for:– Mesh density/quality studies– Design alternative studies
Bullet Impact on Light Weight
Armour System
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Explicit Dynamics AUTODYN Parametric Studies
DesignModeler => Meshing => AUTODYN
Modify
Geometry
Persistent Link(Retain all previous settings)
Modify
Mesh
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Explicit Dynamics AUTODYN 11.0 Development
• Main New Core Features– 4 node Tetrahedral element
• Nodal pressure integration• No volume locking• Supports wide range of
mechanical materials• Validated
– Trajectory Contact (Beta)• Unique Algorithm • Energy and Momentum
Conserving– Does not require penalty
stiffness etc…– Hyperelasticity
• All volume elements
Steel Ball Impacting Ceramic Tile
(Contours of Damage)
Response of rubber seal
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• Example:: Hydraulic RamImpact of 12.7 mm round at 1044 m/s on an aluminium fuel tank
DesignModeler
Meshing
AUTODYN
AUTODYN® 11.0 ANSYS® WorkbenchTM AUTODYN® 11.0 ANSYS® WorkbenchTM
FE Projectile
FE Structure
Finite Volume Fluid
Automated Sliding contact
Automated Coupling (FSI)
Material Location
Pressure Contour
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• Drop test of electronic device (Low velocity)
DesignModeler
Meshing
AUTODYN® 11.0 ANSYS® WorkbenchTM AUTODYN® 11.0 ANSYS® WorkbenchTM
AUTODYN
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• Example:: Sports equipment design
AUTODYN® 11.0 ANSYS® WorkbenchTM AUTODYN® 11.0 ANSYS® WorkbenchTM
DesignModeler
Meshing
AUTODYN
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Dynamics
Back to Agenda
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Dynamics Rotordynamics
• Rotor dynamics is the study of rotating machines and has a very important part to play throughout the modern industrial world
• Rotating machinery is used in many applications– Turbo machines – Power stations – Machine tools – Automobiles – Household machines – Aerospace applications – Medical equipment– Computer equipment
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Dynamics Rotordynamics
• Analysis Type– Static– Modal– Harmonic– Transient
• Elements/Models– Solids– Beams– Shells– Bearing/Springs– Multi-spool Rotors
• Post-Processing– Campbell Diagram– Orbit plots
Modal Analysis
Harmonic Analysis
Transient Analysis
Orbit Plots
Campbell Diagram
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Dynamics Component Mode Synthesis
• CMS now supports– Modal, Static, Transient, Harmonic, Spectrum,
and substructure pre-stress analyses
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Dynamics Component Mode Synthesis
• CMS now has an option for accurate representation of higher frequency modes– Residual Flexibility Free Interface Method
• CMS substructures are now supported in – Transient analysis– Harmonic analysis
Acoustic CMS Analysis
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Dynamics Component Mode Synthesis
• CMS for large rotation• Applicable for nonlinear static and transient• Can be accessed from Workbench by Command
objects
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Dynamics Brake Squeal Analysis
• Relative slip can be specified between rotating parts for brake squeal analysis
• Unsymmetric terms from frictional contact accounted for in eigen solver (QRDAMP)
Brake ModelUnstable Modes
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Dynamics Improved Eigen solvers
• High performance eigensolver (based on VT)– Uses sparse direct solution method for the matrix
solution – The iteration loop is based on a Frequency Derivative
(FD) algorithm– V10 used a frontal solver (Lanczos)
0100020003000400050006000700080009000
10000
Elapsed CPU
LanczosFD
Solu
tion
time
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Dynamics Residual Vector Method
• Method – Uses high frequency
information and can reduce simulation time compared to direct method
– Calculates effect of residual stiffness using eigen modes
• Analysis Type – Mode-superposition
• Harmonic• Transient
– CMS -2.0E-5
-1.0E-5
0.0E+0
1.0E-5
2.0E-5
3.0E-5
0 0.02 0.04 0.06 0.08 0.1
case11(direct)
case12(res-40)
Transient Response
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Offshore
Back to Agenda
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ANSYS and ASAS
• ANSYS Data into ASAS– Create ASAS model files from ANSYS
• ANStoASAS macro supplied with installation– PREP7 or Workbench.
• ASAS-WAVE loading created from ANSYS PIPE59 Element.
• AQWA-WAVE compatible ASAS file can be created with compatible pressure loads to identify the wetted surface elements
– Perform offshore structure code assessments using ASAS toolbox
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ANSYS and AQWA
• ANSYS Data into AQWA– Create AQWA model files from ANSYS
• ANStoAQWA macro supplied with installation– PREP7 or Workbench.
– Perform hydrodynamic analysis on offshore structures
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ANSYS and AQWA
• AQWA Loads into ANSYS– Hydrodynamic loading applied to an ANSYS
model• Plate and shell structures• Pressures calculated by AQWA-LINE using
diffraction/radiation theory
ANSYS Stress plot
courtesy of Vuyk Engineering Rotterdam
Hydrodynamic pressure loading in AQWA
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Thermal Analysis
Back to Agenda
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Thermal Analysis General Enhancements
• Heat generation rates– Input as element body loads on convection link (LINK34)
elements• Multi-frame restarts
– With the thermal solver (THOPT,FULL)– Fast thermal solver (THOPT,QUASI)
• 1D fluid element (FLUID116) table material properties– Can be function of pressure, temperature, velocity, time, and
location• Thermal mass (MASS71) table for heat generation
– Can be function of time, temperature, and location• Temp DOF from 1D fluid element (FLUID116) can be used as
bulk temperatures for a film coefficient boundary condition on layer shell elements (SHELL131/SHELL132 DOFs: TTOP, TBOT, etc.)
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Thermal Analysis HTI Products
• Icechip– Model generation nearly ten times faster– Package-on-Package simulation
• Iceboard– 3D voltage drop simulation accounting for losses in
traces, planes and vias– A simplified board can be exported to Icepak– A direct interface has been developed with Cadence
Allegro
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Coupled Physics Analysis
Back to Agenda
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© 2007 ANSYS, Inc. All rights reserved. 97 ANSYS, Inc. Proprietary
PLANE2232-D 8-node
quadrilateral
SOLID2263-D 20-node
brick
SOLID2273-D 10-node tetrahedron
22x Coupled-Field Analyses
• Direct coupling of electric and structural physics for MEMS– For dielectric material– “Elastic” air to deform the mesh
• Coriolis effects included– Applications
• Gyroscopes• Accelerometers
• INFIN110 and INFIN111 elements have been enhanced to model far-field decay in electric conduction analysis
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Compliantelectrode
Electro-Elastic Strain
0
0.05
0.1
0.15
0.2
0.25
-200 -150 -100 -50 0 50 100 150 200
Electric Field, E (MV/m)
Indu
ced
Stra
in, S
x (%
)
• A voltage is applied between the electrodes
• Electrostatic pressure arises
• Elastomer compresses in the thickness and expands in the plane directions
Elastomericmaterial
Coupled Physics Analysis Dielectric Elastomer Actuator
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• A clamped beam for an RF MEMS switch is modeled to compute the center deflection for an applied voltage
• Forces generated by the electrostatic field will bend the beam towards the ground plane
“Elastic air”
Dielectric beam
Air gap = 5 μm
Ground plane
Coupled Physics Analysis Electrostatically Actuated Beam
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ANSYS, Inc. Proprietary
• A piezoelectric gyroscope for an angular rate sensor is excited into an in-plane vibration by applying an alternating voltage at f=32728 Hz
• The tuning fork is rotated around the axis parallel to the tines
0 Volt
1 Volt
Coupled Physics Analysis Piezoelectric Vibratory Gyroscope
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• INFIN110 and INFIN111 elements have been enhanced to model far-field decay in electric conduction analysis
Layer of INFIN111 elementsVoltage source
SOLID232 mesh
INF boundary
Electric potential distribution
Coupled Physics Analysis Electric Analysis with Open Boundaries
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High Frequency EMAG
Back to Agenda
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HF Emag Advanced Material Models
– Permittivity Tensor [εr ]– Permeability Tensor [μr ]– Electric Current Conductivity Tensor [σe ]– Magnetic Current Conductivity Tensor [σm ]– Magnetic Lossy Tangent– Ferrite
• Links to magnetostatic solver for magnetic field solution
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HF Emag S-Parameter Enhancements
• S-Parameter Adaptive Meshing Solution– Perform adaptive iterations until the s-
parameter convergences to required criteria by automatically refining mesh
– Multi-port for adaptive implementation– Direct and iterative solver in solution
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HF Emag Time Domain Reflectometry/Transmission
• Time Domain Reflectometry (TDR) and Time Domain Transmission (TDT)– Display the waveform of the reflection wave and transmission
wave at ports in time domain, based on frequency-domain S- parameter results
– Display the total waveform at input port– Display the time-domain impedance at port– Impulse and step signal source
FrequencyDomain
TimeDomain
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LF EMAG
Back to Agenda
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LF Emag Adaptive meshing LF Emag Adaptive meshing
• In Workbench and ANSYS
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LF Emag Periodic boundary conditions LF Emag Periodic boundary conditions
• Available in Workbench
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High Performance Computing
Back to Agenda
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High Performance Computing Agenda
• New modal solver: LANPCG– Efficient and Robust– SMP and Distributed
• Single Precision Option for CG calculation– Can now use PCG for ill-condition problems
• Sparse solver robustness• Distributed Sparse solver scalability• Distributed Scalability Enhancements
– Better load balancing• New Platform Support
– Windows 64, MPICH2.0– Micrsoft Compute Cluster Server 2003, MS-MPI
• VT accelerator– Now available for non-linear static and transient stress/thermal
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SMP ANSYS Enhancements New Modal Solver
• New modal solver: LANPCG– Block Lanczos with PCG solver (LANPCG)– Reduce file sizes and I/O requirements– Very robust– Efficient for larger problems (>1,000,000 dofs)
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SMP ANSYS Enhancements LANPCG performance
75291
8,080,601382,492
5,438,0050
24,241,803
Number of Parts Contact PairsNodesCONTACT ElementsSOLID186/187 ElementsCEsNo. of Equations (dofs)
SGI Altix server using six 1.5 GHz Itanium-2 processors on Linux 64- bit OS (SUSE LINUX Enterprise Server 9) with ANSYS 11.0
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Distributed ANSYS (DANSYS) New Distributed LANPCG
• New Distributed modal eigensolver, LANPCG
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Axle Model: Decomposer Enhancements
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Number of CPUs
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10.0 Speed Up
10.0 SP1 Speed Up
11.0 Speed Up
Distributed ANSYS (DANSYS) Improved Load Balancing
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VT Accelerator Optimization for Transients
• Variational Technology (VT)– Expanded to speed up
• Nonlinear static and transient structural solutions not involving contact or plasticity
• Nonlinear static and transient thermal analyses
– Makes solutions 2x to 5x faster for initial solutions– Makes resolves 3x to 10x faster for parameter
changes such as material properties, loads, film coefficients, etc.
• DOE can now potentially be applied to more complex solutions; not just linear static analyses
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VT Accelerator Example• 288,727 elements• 456,635 nodes• Convections with temp
and time dependency
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Quasi ICCGFull PCG - no VT
All results in good agreement(deviation < 1.5%)
Florida Turbine Technologies
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VT Accelerator Example Parameters • Applied temperature and time
dependent film coefficients, bulk temperature
• Variations on film coefficients around top of the blade – Parametric change 1: scaling
80%– Parametric change 2: scaling
60%• Variation on time history for
film coefficients & bulk temp– Parametric change 3: same as 2
+ time history stretched
Film Coefficient vs Time
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InitialParametric 1Parametric 2Parametric 3
Bulk Temperature
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Initial, P1 and P2Parametric 3
Florida Turbine Technologies
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Run without VT156 Cumulative iterations
Elapsed time = 2750 s
Run with VT30 Cumulative iterations
Elapsed time = 775 s
VT Accelerator Example Solutions
Florida Turbine Technologies
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Summary
• ANSYS Mechanical Technology– Innovating engineering simulation
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