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Dean3589

No feasibility after ply shuffling optimization

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Hi everybody,

 

I have problems reaching a feasible design at the last stage of the ply optimization. I am trying to minimize the displacement during the shuffling of the plys. After the first iteration the solver stops without a message in the Message log, if it is feasible or infeasible.

 

Did anybody had the same problem or can help me with this topic

 

Kind regards

 

Dean 

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Hi Prakash,

thank you for your reply. I Have attached the output_file so you can see yourself. The only warning message I get during running the optimization ist :

 

*** WARNING # 1569
 for element id = -10003.
 Thickness is zero for this composite. This will produce meaningless stress
 results and may cause singularity of the global stiffness matrix.

 

What I am wondering about is that I had stacking optimiaztions with the same warning message, that ended in a feasible solution.

 

I hope you can help me with this one

Kind regards

 

Dean

nb016_V1_1.2_prop_reduced.out

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