John Doyle
Ansys Employee
You might have considered this already, but if not, Chapter 21 of the MAPDL Technology Showcase: Example Problems has a buckling and post buckling problem worked out using Stabilization Damping. Perhaps you could compare this with your setup for tips.nWhy do you say that it is illogical for max buckling load to increase by 25% when column length decreases? Doesn?t the shorter column become more resistant to buckling? Perhaps I am misunderstanding what you are reporting. nRegarding the 45% deviation from expected results, it is hard to say for sure. I cannot tell what the parameterized inputs for NSUBST,,,, command are prescribing, but, maybe you need many more substeps to get closer to the point of instability before it fails to converge.nRegards,nJohnn