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.

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"?>

<?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..