I've been trying to use a design study to examine the sensitivity of certain geometric changes. I'm using a nonlinear analysis and the failure mode is generally a combination of Euler and local buckling.
Unfortunately the results I obtain using the design study are not consistent with those obtained doing a separate nonlinear analysis. There seems to be some kind of issue with plot steps. I am using automatic time stepping with a pre-defined min step, so for some cases it takes 5 steps and for others it takes 20 for the model to fail. I am suspicious the problem is getting the design study to behave this way and not simply mimic the original non-linear analysis.
Has anyone had issues getting the design study function to predict failure? Is it more of a check tool to be used only with working loads?
Any comments would be appreciated.