I am trying to analyze a model that consists of round tubing that I am treating as beams and sheet metal sides that I am treating as shells. I applied loads and fixtures points and then welded the contact surfaces between the tubing and sheet metal. When I ran the stress study I get an error that the model is unstable. Am I treating the members correctly? Is there something I can do to figure out why my model is unstable? Thoughts?
-Scott
The first thought that comes to mind is whether the sheet metal pieces are trimmed perfectly to the round tubes. If there is any gap or interference then Simulation will not see them as connected and the weld you added may not be valid. That is just a guess. Seeing the model would maybe help.
Ryan W.