No feasibility after ply shuffling optimization

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

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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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2016

    Hi Dean,

     

    Do you see any error or warning message at the end of the first iteration?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2020

    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

    Unable to find an attachment - read this blog

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