Buckling step is for linear buckling analysis only. For nonlinear buckling, you should use static or (less often) dynamic step. Just make sure you enable Nlgeom because otherwise there will be no buckling.
Buckling step is for linear buckling analysis only. For nonlinear buckling, you should use static or (less often) dynamic step. Just make sure you enable Nlgeom because otherwise there will be no buckling.