NLSTAT allowable responses

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

Hi everybody,

I'm doing a shape optimization of a NLSTAT analysis (nonlinear contact and material are involved). I need stress or strain responses but, as soon as I launch the optimization, this error is shown to me:

2016-11-09 09_36_16-HyperWorks Solver View _test_12x1.5_arkema_opt.fem_.png

Which responses are possible to use with this type of optimization? It is possible to eventually use plastic strain responses?

 

Best regards,

Luke31

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2016

    Hi @luke31

     

    Do you have any material plastic data in your model?

     

    Plasticity is what causing this error. You need to remove plasticity in your material.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2016

    Yes, I have plasticity in my materials. Do I need also to change type of analysis or can I maintain it?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2016

    I think it should not come for gaps and contacts with NLSTAT.

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