Composite Freesize optimization - why do i get a constant thickness?

lswf
lswf Altair Community Member
edited June 2021 in Community Q&A

Hello,

i was trying to run my first composite freesize optimization with the support of this Video: https://www.youtube.com/watch?v=6PJeW3cVpsM&t=1186s

 

In the results is just one constant thickness and now I am wondering what I am doing wrong? (Model is attachted)

 

Thank You!

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Answers

  • Adriano A. Koga
    Adriano A. Koga
    Altair Employee
    edited June 2021

    Hi,

    check your optimization formulation.

     

    You have requested:

    Minimize Compliance (meaning Maximize Stiffness)

     

    as you don't have any constraints (neither deisgn constraints, neither manufacturing constraints), the trivial solution is a full plate with all material possible.

    Usually if you're using min Compliance, it goes with a volume fraction constraint, forcing/limiting maximum amount of material.

    If you take a look at your .out file, it probably shows you this behavior.

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