Topology optimization using stress

User: "Altair Forum User"
Altair Forum User
Altair Employee
Updated by Altair Forum User

Hi,

 

I want to make a 1D topology optimization of two plates bolted together (PBEAM elements). There is 12 holes where bolt can be positioned. I want to find the best place where to put the bolts with a minimum number of 6 bolts. The objective is to minimize the Von Mises stress in one of the plate. I have difficulties to choose the right parameters, responses, constraints and objectives.

 

It is like tutorial  'OS-2040: Spot Weld Reduction using CWELD and 1D Topology Optimization ', but incorporing stress responses.

 

Can you give me some hints / advices ?

 

Thank you

 

Benjamin

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    User: "Rahul Rajan_21763"
    Rahul Rajan_21763
    New Altair Community Member
    Updated by Rahul Rajan_21763

    Stress constraints do not apply to 1D elements.Please have look on below post similar to your requirement,

     

    <?xml version="1.0" encoding="UTF-8"?>Stress constraints.JPG

    User: "Altair Forum User"
    Altair Forum User
    Altair Employee
    OP
    Updated by Altair Forum User

    Thanks again !

    In my model, I want to apply my stress constraint on 2D elements (PShell elements) of the 2 plates. Is that possible if my design variable is on 1D element (Pbeam elements) ?

    Another scenario would be to minimize the Stress of the 2D elements and having a constraint on the volume fraction response? Is that possible ?

     

    Benjamin

    User: "Rahul Rajan_21763"
    Rahul Rajan_21763
    New Altair Community Member
    Updated by Rahul Rajan_21763

    See attached screenshot for recommended setup for Topology optimization & Stress FAQ.

    <?xml version="1.0" encoding="UTF-8"?>Recommended Topo setup.JPG

    <?xml version="1.0" encoding="UTF-8"?>Stress FAQ.JPG

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