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A full complex frame might be too much for Cosmos Xpress to handle. Xpress is a limited version of CosmosWorks. Xpress will only mesh the model with a solid tetrahedral element. Because of the aspect ratio of tube length to wall thickness being high, you had to reduce the default mesh size to get your test problem to run. Cosmos Works has multiple element types, one of which is a beam element. This is a much more effecient element type for structures as your frame.
Wayne Matus wrote:
Xpress is a limited version of CosmosWorks.
I wonder if just removing the radiused corners on the tubing profile would help to simplify the model, and whether that would cause inaccuracies compared to real world. It would be nice to run this analysis without having to upgrade.