{"id":237252,"date":"2022-10-09T13:29:53","date_gmt":"2022-10-09T13:29:53","guid":{"rendered":"\/forum\/?post_type=topic&p=237252"},"modified":"2024-04-08T07:31:43","modified_gmt":"2024-04-08T07:31:43","slug":"stresses-are-not-converging-but-nodal-displacements-are","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/stresses-are-not-converging-but-nodal-displacements-are\/","title":{"rendered":"Stresses are not converging (but nodal displacements are?)"},"content":{"rendered":"

Hello!<\/p>\n

I am currently doing different types of convergence studies but seem to be having a problem. Basically I am simulating a single spur gear in 2D (plane stress with thickness) using PLANE183 elements. The gear is held in place at the nodes of the inner diameter and a line load is applied along the flank of the studied tooth.<\/p>\n

When doing a convergence study by refining the mesh of the tooth I get strange results. The Nodal displacement converges perfectly, but Nodal- and Element Von Mises stresses don’t, as you can see in the attached graphs. Both start increasing in a bumpy way after an inital, small “convergence”. In general the two values stay pretty close to each other. As you can see in the graphs the differences in the results between the first “convergence” and the last step are nothing extreme, but what could be a reason for the stresses not converging?<\/p>\n

Details at location of max stress for step nr.7 (first “convergence”) and step nr.20 (the last step of the convergence study) with visible mesh qualitiy:<\/p>\n

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