LS-DYNA-Intro 14.5 L12 Quick Guide to ANSYS LS-DYNA Extension

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© 2012 ANSYS, Inc. November 8, 2012 1 Release 14.5 14.5 Release Lecture 12 Introduction to ANSYS LS-DYNA Extension Introduction to ANSYS LS-DYNA
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Transcript of LS-DYNA-Intro 14.5 L12 Quick Guide to ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 1 Release 14.5

    14.5 Release

    Lecture 12 Introduction to ANSYS LS-DYNA Extension

    Introduction to ANSYS LS-DYNA

  • 2012 ANSYS, Inc. November 8, 2012 2 Release 14.5

    ANSYS LS-DYNA in Workbench

    Very powerful for geometry modeling and mesh generation

    Extremely easy to setup contact and boundary conditions

    Capability of design optimization

    Have to start three different user interfaces for pre-processing, solving, and post-processing

    ACT (Application Extension Toolkit)

    Easy to use and comprehensive toolkit for performing customization within ANSYS Mechanical

    Become full release in R14.5

    What is ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 3 Release 14.5

    ANSYS LS-DYNA Extension: ANSYS LS-DYNA integrated with ACT Interface

    Single user interface that integrates pre-processing, solving, and post-processing together

    Much convenient and easy to use

    Partnered with LSTC in its development

    Available after R14.5 release

    Work with existing ANSYS LS-DYNA license

    User can customize user interface to expand its features by themselves with the least amount of work, when they have ACT development license from ANSYS

    What is ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 4 Release 14.5

    In ANSYS R14.5 Workbench, Extension is added into the pull-down menu

    Click on Extension and then Install Extension to browse to the file LSDYNA.wbex and install ANSYS LS-DYNA Extension

    Start ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 5 Release 14.5

    Click on Extension again and then Manage Extension

    In Extension Manager, check the box of LSDYNA and then Close to load the extension

    ANSYS LS-DYNA system will be added under Analysis System in Workbench Toolbox as a new system. See next slide.

    Start ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 6 Release 14.5

    To create an ANSYS LS-DYNA project

    Drag and drop ANSYS LS-DYNA system to Project Schematic

    Or double click on ANSYS LS-DYNA system

    Start ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 7 Release 14.5

    Workshop 8 Soft Ring Impact in the ANSYS LS-DYNA Training course is used to demonstrate the use of ANSYS LS-DYNA Extension

    In the Workshop 8, Keyword Snippet is used to

    Change the contact type

    Increase the slave penalty stiffness

    So over-penetration could be prevented between the soft and the hard materials

    Using ANSYS LS-DYNA Extension, slave penalty stiffness can be specified directly in user interface. No need to use Keyword Snippet.

    Start ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 8 Release 14.5

    In Engineering Data, add a new material Soft

    Model Setup in ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 9 Release 14.5

    In Geometry, load the geometry file of soft ring and hard wall

    Double click on Model to open the model

    Model Setup in ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 10 Release 14.5

    Model Setup in ANSYS LS-DYNA Extension

    ANSYS LS-DYNA Extension Pre and Post Toolbar

  • 2012 ANSYS, Inc. November 8, 2012 11 Release 14.5

    Pre-processing toolbar

    For each Part in the model

    Specify different Section properties such as element formulations

    Specify different Hourglass Controls

    Define Airbag, not available in R14.5

    Include more contact definitions and Constraints

    Define Results Trackers for Time History plot

    Post-processing toolbar

    Enable ASCII output plot

    More options will be added into the toolbar in future

    Overview of the Extension Toolbar

  • 2012 ANSYS, Inc. November 8, 2012 12 Release 14.5

    Complete definition of geometry

    Model Setup in ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 13 Release 14.5

    Under Step Controls of Analysis Settings,change End Time to 5E-4 s

    More options are available

    Model Setup in ANSYS LS-DYNA Extension

    Memory Allocation, HPC

    Switching analysis type, single/double precision, units

    Specify global damping

    Specify global hourglass control

    Specify global control if model has ALE parts

    Specify output control

  • 2012 ANSYS, Inc. November 8, 2012 14 Release 14.5

    Under Output Controls of Analysis Settings

    Change Calculate Results At to Equally Spaced Points

    Change Value to 100

    Under Time History Output Controls of Analysis Settings

    Change Calculate Results At toEqually Spaced Points

    Change Value to 10

    Change Output to Global Data

    Model Setup in ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 15 Release 14.5

    Right click on Analysis Settings to apply Fixed Support boundary condition to the Wall

    More boundary condition types areavailable

    Fixed Rotation

    Elastic Support

    Nodal Force

    Nodal Displacement

    Temperature

    Convection

    Heat Flux

    Radiation

    Model Setup in ANSYS LS-DYNA Extension

    Not available in R14.5

  • 2012 ANSYS, Inc. November 8, 2012 16 Release 14.5

    Right click on Initial Condition to insert Velocity and scope it to Ring

    X Component = 0 m/s

    Y Component = 200 m/s

    Z Component = -150 m/s

    Model Setup in ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 17 Release 14.5

    Right Click on Solution and then Insert Deformation and Total

    Save the project

    Click on Solve to run the simulation

    Model Setup in ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 18 Release 14.5

    Solve Output under Solution Information

  • 2012 ANSYS, Inc. November 8, 2012 19 Release 14.5

    Contains the following information

    LS-DYNA version number and your system information

    Initialization details

    Warning messages

    Error messages

    Time step size and other cycle details

    Timing information

    If these is a problem with your model, look at the Solver Output first to diagnose the problem

    If you need to submit a Service Request to ANSYS Technical Support, make sure the Solver Output (or files d3hsp and messag) is attached to the Service Request

    Solve Output under Solution Information

  • 2012 ANSYS, Inc. November 8, 2012 20 Release 14.5

    Plot Total Deformation, observe the over-penetration

    Post-Processing Results in the LS-DYNA Extension

    Over-Penetration

  • 2012 ANSYS, Inc. November 8, 2012 21 Release 14.5

    Under Connections and then Contacts, create Frictionless Ring To Wall with Top as the Shell Face

    Suppress Body Interaction

    Right click on ANSYS LS-DYNA and then insert Contact Properties

    Change Contact toFrictionless Ring To Wall

    Change Type to Forming

    Change Slave Penalty Scale Factor to10

    Change Master Penalty Scale Factor to 1

    Click on Solve to re-run the analysis

    Model Setup in ANSYS LS-DYNA Extension

  • 2012 ANSYS, Inc. November 8, 2012 22 Release 14.5

    Post-Process Solution: No Over-Penetration

  • 2012 ANSYS, Inc. November 8, 2012 23 Release 14.5

    In LSDYNA Post tool bar, click on ASCII and then Global Data

    Global Data will be inserted under Solution

    Click on Tabular Data in the details of Global Data

    Click on the symbol in the Tabular Data to add a new line

    Post-Process Solution: Time History

  • 2012 ANSYS, Inc. November 8, 2012 24 Release 14.5

    Click on the yellow field to see the list and then select the variable, for example, Kinetic Energy

    Click on the symbol and then the yellow field again to add more variables such as Total Energy, Internal Energy, Hourglass Energy, and External Work to Tabular Data

    Click on Apply to plot time history of these variables

    Post-Process Solution: Time History

  • 2012 ANSYS, Inc. November 8, 2012 25 Release 14.5

    Click on Worksheet on the top tool bar to show the time history plot

    Post-Process Solution: Time History