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  3. Topology Optimization: Mechanical User’s Guide states that pull-out direction has to lie in the symmetry plane. Why?

Topology Optimization: Mechanical User’s Guide states that pull-out direction has to lie in the symmetry plane. Why?

Tagged: 2019 R1, analysis-techniques, mechanical, optimization, structural-mechanics
    • April 13, 2023 at 7:33 am
      SolutionSolution
      Participant

      The reason for the documented limitation is that the combination leads to over-constraint. Applying a symmetry constraint on X plane is the same as applying a pullout constraint perpendicular to X plane. The attached test model proves this. Hence, user needs one or the other but not both. If user does want to apply a pullout in addition to symmetry constraint, the pull out needs to be running in line with the symmetry plane (in Y or Z directions if X is the symmetry plane), but not against it. Or, in other words, as the docs state “…the pull out direction must be in the symmetry plane”.

      Attachments:
      1. 2058979.zip

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