Hello I am trying to do a nonlinear buckling analysis of a beam , I am following the method here : (https://www.simutechgroup.com/tips-and-tricks/fea-articles/94-fea-tips-tricks-buckling)
I get very strange results (look attached; the stress-disp curve results are not sensible)
I was wondering if whether it is the upgeom command that is not working ? and I was wondering if I can see it (visualize it)
I don't understand why the results are like this ??