Topology optimization using stress

Altair Employee

Aug 4, 2016

Updated Oct 4, 2020 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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Rahul Rajan_21763

New Altair Community Member

Aug 8, 2016

Updated Aug 8, 2016 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"?>

Altair Forum User

Altair Employee

Aug 8, 2016

Updated Aug 8, 2016 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

Rahul Rajan_21763

New Altair Community Member

Aug 9, 2016

Updated Aug 9, 2016 by Rahul Rajan_21763

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

<?xml version="1.0" encoding="UTF-8"?>