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									                ANSYS AUTODYN in Workbench




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Table of Contents
Application Overview ................................................................................................................................. 1
ANSYS AUTODYN Approach ....................................................................................................................... 3
    ANSYS AUTODYN Walkthrough Using Explicit Dynamics .......................................................................... 4
    ANSYS AUTODYN Walkthrough Using Meshing ...................................................................................... 10
ANSYS AUTODYN On-line Help ................................................................................................................. 17
Index .......................................................................................................................................................... 19




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Application Overview
ANSYS AUTODYN is an explicit analysis tool for modeling nonlinear dynamics of solids, fluids, gas, and their
interaction. With a fully integrated, easy to use graphical interface allowing set up, running, and post pro-
cessing of problems, ANSYS AUTODYN offers:

 •   Finite element solvers for computational structural dynamics (FE).
 •   Finite volume solvers for fast transient Computational Fluid Dynamics (CFD).
 •   Mesh-free particle solvers for high velocities, large deformation, and fragmentation (SPH).
 •   Multi-solver coupling for multi-physics solutions including coupling between FE, CFD, and SPH.
 •   A wide suite of material models incorporating constitutive response and coupled thermodynamics.
 •   Serial and parallel computation on shared and distributed memory systems.

ANSYS AUTODYN has been used in a vast array of projects and nonlinear phenomena. Here is a sample of
real projects where it has been used:

 •   Optimization and design of armor and anti-armor systems.
 •   Designing mine protection schemes for personnel carriers.
 •   Building protection measures and insurance risk assessment for blast effects in city centers.
 •   Aircraft impact risk assessment for power stations.
 •   Performance studies of oil-well perforating charges.
 •   Decommissioning of offshore platforms.
 •   Designing the shielding system on the International Space Station.
 •   Safety assessment of particle accelerators.
 •   Characterization of materials subjected to high dynamic loading.
 •   Drop test of electronics devices.
 •   Nuclear reactor safety.
 •   Nuclear waste transportation safety.




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ANSYS AUTODYN Approach
Accessing ANSYS AUTODYN

The ANSYS AUTODYN application is available in the Component Systems section of the Workbench Toolbox.




Use this application to access the full functionality of the ANSYS AUTODYN product. Please refer to the online
ANSYS Workbench documentation for an explanation of the AUTODYN system components and supported
operations.

The structural FE components of the ANSYS AUTODYN solver can also be accessed using the Mechanical
Explicit Dynamics (AUTODYN) system located in the Analysis Systems section of the Workbench Toolbox.
Please refer to the Mechanical Help system for further details.

Steps to Using ANSYS AUTODYN
There are three different approaches to using ANSYS AUTODYN within ANSYS Workbench:

 •   Insert an Explicit Dynamics (AUTODYN) system from the Analysis Systems Toolbox. Use the Engineering
     Data, Geometry, Model and Setup cells to define the structural/mechanical model. Drag and drop an
     AUTODYN component system onto the Setup cell of the Explicit Dynamics (AUTODYN) system. Double
     clicking the AUTODYN system Setup cell will start ANSYS AUTODYN and transfer the FE model definition
     (including materials, mesh, connections, loading, constraints, analysis settings) from the Explicit Dynamics
     (AUTODYN) system.
     –   Can only set-up models for the FE solvers (including connections and contact)
     –   4-noded Tetrahedral meshes, 8-Noded Hexahedral Meshes, 4-and 3-noded Quad meshes, 2-noded
         Beam meshes
     –   Try ANSYS AUTODYN Walkthrough Using Explicit Dynamics (p. 4) for more details of the procedure.
 •   Insert a Mesh system from the Component Systems Toolbox. Use the Geometry and Mesh cells to define
     the structural/mechanical mesh. Drag and drop an AUTODYN component system onto the Mesh cell of
     the Mesh system. Double clicking the AUTODYN system Setup cell will start ANSYS AUTODYN and
     transfer the FE model definition (including mesh and named selections) from the Mesh system to the
     AUTODYN system.
     –   Can only set-up meshes for the FE solvers
     –   4-noded Tetrahedral meshes, 8-Noded Hexahedral Meshes, 4-and 3-noded Quad meshes, 2-noded
         Beam meshes
     –   Try ANSYS AUTODYN Walkthrough Using Meshing (p. 10) for more details of the procedure.
 •   For simple geometries, integrated geometry creation, and meshing tools within ANSYS AUTODYN may
     be used. Insert an AUTODYN Component System and double click the Setup cell to run and AUTODYN
     application standalone.
     –   Can set up models for all solvers.

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ANSYS AUTODYN Approach


ANSYS AUTODYN Walkthrough Using Explicit Dynamics
1.   Start Workbench.
2.   Insert an Explicit Dynamics (AUTODYN) system from the Analysis Systems toolbox.




3.   Right Click the Geometry cell (A3), and select Import a Geometry.
4.   Double Click the Model cell (A4), to open up the Mechanical editor.
     •   Define the Body Interactions.




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                                                                    ANSYS AUTODYN Walkthrough Using Explicit Dynamics




•   Define the Mesh.




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ANSYS AUTODYN Approach




    •   Define Initial Conditions.




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                                                                    ANSYS AUTODYN Walkthrough Using Explicit Dynamics




•   Define Boundary Conditions.




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ANSYS AUTODYN Approach




    •   Define Analysis Settings.




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                                                                         ANSYS AUTODYN Walkthrough Using Explicit Dynamics

5.   Go to the Project Schematic, drag an AUTODYN Component System onto cell A5, to generate the link
     between the Setup cell (A5) of the Explicit Dynamics system and the Setup cell (B2) of the AUTODYN
     Component System.




6.   Transfer the Explicit Dynamics Setup to AUTODYN.
     •   RMB on Expicit Dynamics (AUTODYN system Setup cell (A5), Select Update.


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ANSYS AUTODYN Approach

     •   The model definition in the Expicit Dynamics system will be transferred into the ANSYS AUTODYN
         application.

         Double click the Setup cell (B2) of the AUTODYN system to open the ANSYS AUTODYN application.
         –   Materials
         –   Mesh
         –   Initial Conditions
         –   Boundary Conditions
         –   Interactions
         –   Controls
         –   Output
     •   Complete the model setup in ANSYS AUTODYN.
     •   Execute the Simulation.
     •   Post-process results.




ANSYS AUTODYN Walkthrough Using Meshing
1.   Start ANSYS Workbench.
2.   Insert Meshing system from the Component Systems toolbox.




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                                                                                       ANSYS AUTODYN Walkthrough Using Meshing




3.   Right Click the Geometry cell (A2), Import a Geometry.
4.   Double Click the Mesh cell (A3), to open up the meshing editor.
5.   Define the Mesh.




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ANSYS AUTODYN Approach




6.   Go to the Project Schematic, drag an AUTODYN Component System onto cell A3, to generate the
     link between the Mesh cell (A3) of the Meshing system and the Setup cell (B2) of the AUTODYN
     Component System.




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                                                                   ANSYS AUTODYN Walkthrough Using Meshing




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ANSYS AUTODYN Approach




7.   Double click the Setup cell (B2) of the AUTODYN system to open the ANSYS AUTODYN application.

     •   The model definition in the Mesh system will be transferred into the ANSYS AUTODYN application
         Mesh Named Selections.
     •   Complete the model setup in ANSYS AUTODYN.
     •   Execute the Simulation.
     •   Post-process results.




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                                                                                  ANSYS AUTODYN Walkthrough Using Meshing




Note

Unlike release 11.0, changes to material assignment, loads and initial conditions made in AUTODYN
will be lost after an update of geometry or mesh. It is recommended that you link the AUTODYN
system to an Explicit Dynamics system rather than to a Meshing system. Materials, loads, and so
on may then be applied in the Explicit Dynamics system and will be retained after a geometry
or mesh update.




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ANSYS AUTODYN On-line Help
Further information can be found in the comprehensive ANSYS AUTODYN On-line Help. This may be opened
by selecting Help, Contents from the ANSYS AUTODYN application menu bar, or by selecting the context-
sensitive Help buttons, situated throughout the ANSYS AUTODYN graphical user interface.




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Index




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