MATS1 elasto-plastic

mvass
mvass Altair Community Member
edited October 2020 in Community Q&A

Hello all,

 

I know this question has been addressed in some past questions, however I would like to know if the the values of the true stress = sigma_nominal(1+strain_nominal) versus plastic strain = strain_true_total-(true stress)/E, where: strain_true_total = ln(1+strain_nominal), E = Young's modulus are entered into the tables1, or the values directly from the experimental stress-strain curve are entered. I am asking about the case of an elastoplastic material, with the table defined in terms of the plastic strain and the presence of large deformations.

 

Thank you.  

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2018

    Hi @mvass

     

    Since you are interested in large deformation analysis, please use True stress-strain curve instead of the experimental curve,

     

    Experiment results are engineering stress-strain curve and it needs to be converted to True stress-strain when using in MATS1

  • mvass
    mvass Altair Community Member
    edited November 2018

    Thank you for the quick reply. It's exactly what I expected.

     

    Regards 

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