Problem in FEA: Column is not buckling?
Hi all,
I have a column in my model and it is not buckling in the FEA analysis, rather getting compressed. The load is being applied uniaxially with respect to the column.
Is there a way I can make the column buckle? In ABAQUS, we introduce imperfection in the column by deviating the geometry by a little bit based on buckling modes (scaled by 0.5 to 1%). I was wondering if we can do the same in Inspire since there is an option for buckling mode calculation during FE analysis.
Answers

Hi,
you can get a column to buckle by introducing imperfections in:
geometry
loads (small offaxis load component)
However, I don't think nonlinear buckling analysis can be done in Inspire because it uses a linear solver. It can be done using Optistruct or Radioss.
Actually, linear buckling analysis does not require imperfections, because a small displacement of a perturbed shape is assumed in each element that induces a stressdependent stiffening effect:
https://www.digitalengineering247.com/article/linearandnonlinearbucklinginfea/
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