MAT/LAW 21 (DPRAG)

Nancy Jewel Mcdonie
Nancy Jewel Mcdonie Altair Community Member
edited March 12 in Community Q&A

Hi all, 

Can anyone explain for me what is F in this equation? I'm modeling sand material use MAT LAW 21. 

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Answers

  • Polyvios Romanidis
    Polyvios Romanidis New Altair Community Member
    edited March 12

    Hi Nancy,

    This F parameter is set in order to define the yield point.  The following is true for your material based on F value:

    • F = 0, material exactly at yield point
    • F > 0, material in the plastic region
    • F < 0, material in the elastic region

    This parameter can also be used for Von-Mises yield criteria, where the pressure-dependent terms are equal to 0 and A0 = yield point.  This can probably help you to better understand the use of this value.

    Polyvios

     

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