{"id":363985,"date":"2024-04-24T14:48:21","date_gmt":"2024-04-24T14:48:21","guid":{"rendered":"\/forum\/forums\/reply\/363985\/"},"modified":"2024-04-24T14:48:21","modified_gmt":"2024-04-24T14:48:21","slug":"363985","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/363985\/","title":{"rendered":"Reply To: Wafer rotation deformation"},"content":{"rendered":"<p>&lt;p&gt;High speed rotation analysis with friction is borderline impossible for a couple reasons.&nbsp; One, finite elements can&#8217;t be rotated more than 2 or 3 degree per step.&nbsp; Two, the element faces for contact are constantly changing so the rotation should not produce translational motion of more than 1\/2 element length per step.&nbsp; Even with small time steps convergence will constantly be slow making the run time almost unlimited.&nbsp; Technology Showcase Example 28 in the APDL doc. is a simpler analysis than yours, yet takes 24 hours to run.&nbsp; What is the object of the analysis?&nbsp; What do you want to find out?&nbsp;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-363985","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"High speed rotation analysis with friction is borderline impossible for a couple reasons. 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