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Optistruct- Optimizing and Analyzing

Altair Forum User

Hi,

Is it possible in Optistruct to optimize a model and then afterwards analyze it for certain stresses? (run optimization and then run analysis on the optimized shape)

I have created a shape with certain forces and stresses and optimized it successfully for minimum compliance & constrained volume, but I would like to analyze the optimized shape for stresses in several different locations of the shape.

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Altair Forum User

Hi,

1) What type of optimization have you used?

2) what type of optimization are you planning ahead?

You maynot get a desired result if you are using static stress in topology or free size optimization.

Altair Forum User

I was using the topology optimization (in Hyperworks v12.0). I was using minimum compliance and a constraint on volume fraction. It was successful.

Now I want to include static stress as a constaint.

Is it advisable to set the problem as: minimize volume fraction and have a constraint on stress? I know there is an option to set a stress constraint in the topology section>parameters. Or is it better to set the static stess constraint as a response/constraint in the optimization section?

Thanks for your help!

Rahul Rajan_21763

Defining Stress constraint through DTPL card is recommended.PFA some FAQ on this topic.

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

Altair Forum User

I used the stress constraint through the DPTL card as you mentioned.

Thank you, it worked!!

Rahul Rajan_21763

Thanks for the update..