Buckling Analysis in Ansys
Buckling Analysis in Ansys
(OP)
I am doing a buckling analysis where the column will buckle. It has a pinned-pinned mount and a side load perpendicular to the axis at the center of gravity. Where my problem comes in is that the center of the column can only deflect 20mm. How can I model/simulate this in Ansys WB 10?





RE: Buckling Analysis in Ansys
Not to analyze it, but to get realistic, usable answers. I don't know Ansys in any detail, and I don't know if 20 mm is a lot or a little (Depends on the length, stiffness, etc), but simulating buckling in FEA is generally complicated. How can you be sure that you model your geometry correctly. Any tiny out of center deflection of the column will reduce the Cr bucling load significantly. The FEA analysis will assume a perfect geometry, which you probably will not have.
So be careful. Use large Factor of Safety
RE: Buckling Analysis in Ansys
Tata but not yet tara
RE: Buckling Analysis in Ansys
RE: Buckling Analysis in Ansys
RE: Buckling Analysis in Ansys
RE: Buckling Analysis in Ansys
It sounds as though you're trying to find the point at which your column deflects 20mm to the side. Ansys ramps the load until it makes it through the analysis, so if you're working in "time steps" and the end time is 1, you should be able to plot the directional deformation versus the loading. Stabilization adds dampers to the model nodes to help the solution converge.
If you don't have stabilization on, Ansys still may give you what you're looking for with a small enough time step, but your solution most likely won't converge completely.
Ansys also has a RIKS solver available (similar to ABAQUS), in case you cannot get your model to converge, but it requires APDL scripting (even in WB 13). Most likely, stabilization should work fine.