eigenvalue buckling ansys , finding Stress

[umatrix]

Hello Eng Tips,
I have computed the eigenvalue buckling analysis in Ansys. I have obtained the load multiplier and the deflection. How do I get the stress associated with this loading?
Not the equivalent stress, but the bending stress associated with the buckling loading?

Thank you.

 

[FEA way]

Linear buckling analysis won’t give you real displacements or stresses. If you need their values, run nonlinear buckling simulation (as regular static analysis but with geometric nonlinearity).

 

[petb]

Also, be very careful if this is a shell structure, like a silo or similar. You will be grossly overestimating the capacity of such structures using an eigenvalue buckling.

 

[sramos]

Answering your question, the simple way to get the stress is using APDL commands. Check this tutorial

https://simutechgroup.com/ansys-workbench-nonlinear-buckling-with-pre-buckled-shape-distortion/

You must consider the comments above.

 

[umatrix]

Thank you everyone.