1shan
Ansys Employee
Do note that buckling mode shapes do not represent actual displacements but help you to visualize how a part or an assembly deforms when buckling.
If you receive all negative buckling load factor values for your Eigenvalue Buckling analysis and you wish to see them in the positive values, or vice versa, reverse the direction of all of the loads you applied in the Static Structural analysis when theKeep Pre-Stress Load-Patternproperty is set toYes. If this property is set toNo, reverse the direction of all of the loads that you applied in Eigenvalue Buckling analysis.
If you are interested in knowing how the stiffness changes you need to perform a non linear buckling analysis in static structural with gradually increasing loads until the structure becomes unstable. Have a look at
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Regards Ishan