Free Size optimization - non optimized plies

Hello,

I have a problem regarding free sizing optimization with Laminates. After free sizing optimization when optistruct creates 4 plies of each fibre orientation there remain exactly the first ply of each fibre orientation which has the shape of the whole design space. In my case the 4 plies are grouped together as the first plies of my model. I attached a picture of my problem. I tried difference settings with TMANUF, min, max Laminat thickness. But the problem is always the same.

All plies based on the same elements. To introduce Loads I used RBE3 and RBE2 elements and connect them to the elements.

Do you have any suggestions how to fix my problem?

Thank you in advance

Do you have any suggestions?

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Altair Forum User

Hi Martin,

TAMUF will not have any effect during freesize optimization. But you can address this problem in Size optimization where plies will be sliced as per TAMNUF thickness.

Altair Forum User

okay,

but how can I get rid of the non optimized plies or how can I force optistruct to optimize them? Because normally they should be optimized during the free sizing phase and the plies are probably used to minimize the wcomp objective. Or Are these plies kind of dead bodies?