Stress constrained Optimization

Altair Forum User
Altair Forum User
Altair Employee
edited February 2021 in Community Q&A

Dear all,

I would like to do a stress constrained optimization on a small aircraft wing.

 

My objective: Minimize the volume

Constraint: Max von-Mises stress < yield stress of the material.

 

Can you let me know how to formulate this in Optistruct?

I got the following error in my first try:

 

 *** ERROR # 1812 ***
 Multiple responses are assigned to the DESOBJ objective function.
 A MINMAX/MAXMIN objective function definition with DOBJREF should
 be used instead.

 

Minmax reduces the maximum of a parameters, in this case von-Mises stress can be given. but I want to set a limit for the stress. Can this be done using Optistruct?

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Hi Suraj,

     

    I missed this post, sorry for that.

     

    What type of optimization are you running. 

     

    You can specify stress constraint on DTPL card, if you are running topology optimization. 

  • Anıl Türkseven
    Anıl Türkseven Altair Community Member
    edited February 2021

    Hi Suraj,

     

    Did you solve the problem ? If you solved, Can you explain me how to formulate ?

     

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