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Found 4 results

  1. Hello, I am working on a composite optimization problem. I follow the skateboard tutorial but I have several components in my problem (not all composite). I am trying to minimize the mass given some static displacement constraints. Phase 1 (free size) and phase 2 (size) optimizations are problem free but when I import the shuffling file produced in phase 2 to hypermesh, I see that the laminate I am trying to shuffle optimize includes plies from other components. Have you ever encountered such a problem? I cannot share the files due to confidentiality agreement. Thanks
  2. Hi everyone, In the Optistruct 13.0 Reference guide, it says that in the DSHUFFLE card can be defined a RANGE parameter. However I can't find it in my software which is v13.0. Can anybody explain why? Thank you, Gonçalo
  3. 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
  4. Hey all, currently I am working on a composite optimization process that involves no 45 and -45° plies. What I experienced was, that with the step 3 (shuffle optimization), optistruct did not consider my constraint of maximum ply successor. Is this a knows issue? Additionally, why can't we define pairing constraints between other plies than the 45 and -45° ? Is there a physical reason why you would do that just with 45 and -45 ? Thanks and best regards Merula
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