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Alessandro

Issue with ply thickness constraint (PLYTHK) in free-size optimization

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Dear Community,

 

I find a problem in imposing minimum ply thickness constraint (PLYTHK) during free-size optimization.

Whatever value I put in the DSIZE card as minimum ply thickness, this seems to be ignored by the solver and I get, in the resultant size model, plies with thickness lower than the value I specify.

 

I have attached a simple model as example.

In the example: Although I set 0.05mm as minimum ply thickness for all the plies, I get plies with lower thickness (e.g, ply 205200 is 0.02mm thick, ply 310300 is 0.0096mm thick, and so on...) in the sized resultant model.

 

Has anybody found the same behaviour? and, has anybody found a solution?

 

 

Thanks for the support,

Alessandro

plythk_issue_sizing.13.fem

plythk_issue.hm

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Hi @Alessandro

 

PLYTHK constraint does not show any effect in Freesize optimization. This constraint will be carried to Size optimization and plies will be divided to ply thickness value during size optimization. 

 

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