How can I assign the initial stress data to my model before loading and simulation in OptiStuct?

User: "Sarjan Tiwari_21602"
Sarjan Tiwari_21602
New Altair Community Member
Updated by Sarjan Tiwari_21602

I have the stress state of the component in *.sta file obtained from the Radioss solver.

Is there a way to assign the initial stress condition to model reading from .sta file before defining loading in Optistruct?

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OptiStruct
v2022.1.1
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    User: "Adriano_Koga"
    Adriano_Koga
    Altair Employee
    Accepted Answer
    Updated by Adriano_Koga

    not really.

    OptiStruct supports initial stresses, but it uses a different format for doing so.

    You need to input the dta as indicated in the attached INISTRS card.

    INISTRS.pdf
    User: "Sarjan Tiwari_21602"
    Sarjan Tiwari_21602
    New Altair Community Member
    OP
    Updated by Sarjan Tiwari_21602

    not really.

    OptiStruct supports initial stresses, but it uses a different format for doing so.

    You need to input the dta as indicated in the attached INISTRS card.

    Thank you for your reply. INISTRS card seems like the option I have. But I am unable to create INISTRS card. Where can I find the INISTRS card? Can I write it down directly to the *.fem file from the text editor?

    User: "Adriano_Koga"
    Adriano_Koga
    Altair Employee
    Updated by Adriano_Koga

    Thank you for your reply. INISTRS card seems like the option I have. But I am unable to create INISTRS card. Where can I find the INISTRS card? Can I write it down directly to the *.fem file from the text editor?

    I believe you will need to write it outside HyperMesh and import it as an include file into your model.

    Maybe SimLab supports it already. Maybe it's worth taking a look.

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