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  • VUMAT subroutine

    Hi all,
    I have implemented a damage model using UMAT and I want to convert it to VUMAT subroutine with Abaqus/Explicit. Anyone explain me how to change UMAT to VUMAT code ?
    thanks in advance.

  • #2
    That is usually easy to do. Just change the function header interface to the format required by Abaqus/Explicit. A VUMAT is also nice since it does not require the Jacobian.

    -Jorgen
    Jorgen Bergstrom, Ph.D. PolymerFEM Administrator

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    • #3
      http://www.soilmodels.info/node18.html

      Interface umat - vumat

      Interface between umat (Abaqus/Standard) and vumat (Abaqus/Explicit).

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      • #4
        Thank you Jorgen for the reply.
        When you say VUMAT does not require the Jacobian, is means that I delete the definition of DDSDDE from my UMAT ?
        Thanks.

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        • #5
          Yes you can. That part is not needed for a VUMAT.

          -Jorgen
          Jorgen Bergstrom, Ph.D. PolymerFEM Administrator

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