{"id":167933,"date":"2023-04-13T07:33:26","date_gmt":"2023-04-13T07:33:26","guid":{"rendered":"\/knowledge\/forums\/topic\/topology-optimization-mechanical-users-guide-states-that-pull-out-direction-has-to-lie-in-the-symmetry-plane-why\/"},"modified":"2023-07-31T12:32:51","modified_gmt":"2023-07-31T12:32:51","slug":"topology-optimization-mechanical-users-guide-states-that-pull-out-direction-has-to-lie-in-the-symmetry-plane-why","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/topology-optimization-mechanical-users-guide-states-that-pull-out-direction-has-to-lie-in-the-symmetry-plane-why\/","title":{"rendered":"Topology Optimization: Mechanical User’s Guide states that pull-out direction has to lie in the symmetry plane. Why?"},"content":{"rendered":"

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”. <\/p>\n

Attachments:
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