Hyperelastic Materials

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi!

 

How can I define hyperelastic materials in Hypermesh (e.g. Mooney Rivlin)?

 

Best, J

 

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited June 2017

    Use MATHE card.PFA screenshot for same.

    <?xml version="1.0" encoding="UTF-8"?>MATHE card.JPG

  • durukanbdilek
    durukanbdilek Altair Community Member
    edited November 2019

    hi Mr Rahul

    this material model can be used for only PSOLID property cant it?

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited November 2019

    Either the PSOLID or PLSOLID Bulk Data Entry can be used to reference the MATHE Bulk Data Entry. 

  • durukanbdilek
    durukanbdilek Altair Community Member
    edited November 2019

    shell or mebrane element is not suitable for this Material Model (MATHE) isnt it ?

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited November 2019

    Defines the properties of nonlinear hyperelastic solidelements, referenced by CHEXA, CPENTA, and CTETRA Bulk Data Entries. The MATHE hyperelasticmaterial can be referenced to define corresponding material properties.

  • durukanbdilek
    durukanbdilek Altair Community Member
    edited November 2019

    in Abaqus, this material can be used with mebrane elements, hyperworks is vey strange

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited November 2019

    Currently shell and membrane for MATHE is not supported.PFA highlights of OptiStruct 2019.1.

    <?xml version="1.0" encoding="UTF-8"?>2019.1.JPG

  • durukanbdilek
    durukanbdilek Altair Community Member
    edited November 2019

    viscoelastic material in Optistruct 2019 ? how to use ? Mr Rahul

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited November 2019

    As mentioned above this is available with OptiStruct 2019.1 version.

    In OptiStruct the MATVE bulk data entry defines the material properties for Viscoelastic materials.

    MATVE is only supported for Small displacement nonlinear static and transient analysis.& Solid elements both first and second order (CHEXA,CTETRA,CPENTA,CPYRA) are currently supported.Let me know if you need the demo file for same.

  • durukanbdilek
    durukanbdilek Altair Community Member
    edited November 2019

    I m using Optistruct 2019 however I could not find MATVE card when I looked at my Pc

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited November 2019

    If you are a commercial customer then please upgrade to HW Desktop 2019.1 (hotfix is 2019.1.1)and for solvers OptiStruct 2019.1 (hotfix is 2019.1.1)

  • durukanbdilek
    durukanbdilek Altair Community Member
    edited November 2019

    I m academic customer I use for PHD thesis

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited November 2019

    If you are using Student edition, then you may not be able to use the point release. Please check the details below for the research license.

    https://altairuniversity.com/researcher/success-is-the-ability/

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2020

    HEY RAHUL. AM TRYING TO MODEL POLYURETHANE IN OPTISTRUCT.... I DNT KNOW HOW TO GIVE INPUT FOR MATERIAL PROPERTIESS. I CHOSE MATHE CARD SINCE POLYURETHANE IS A HYPER ELASTIC MATERIAL BUT AM NOT SURE ABOUT THE MODEL COEFFICIENTS (LIKE MOONEY RIVLIN OR YEOH OR OGDEN). WILL U HELP ME ON THIS

  • FaroukM
    FaroukM Altair Community Member
    edited July 2020
    Altair Forum User said:

    HEY RAHUL. AM TRYING TO MODEL POLYURETHANE IN OPTISTRUCT.... I DNT KNOW HOW TO GIVE INPUT FOR MATERIAL PROPERTIESS. I CHOSE MATHE CARD SINCE POLYURETHANE IS A HYPER ELASTIC MATERIAL BUT AM NOT SURE ABOUT THE MODEL COEFFICIENTS (LIKE MOONEY RIVLIN OR YEOH OR OGDEN). WILL U HELP ME ON THIS

    Normally, you have to optimize your hyperelastic model based on experimental data ...

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