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I'm trying to run a nonlinear (elastic for now) buckling analysis in ANSYS. Basically I have a thin cylindrical shell (made up of SHELL181). fixed at one end (rigid) and applied force and/or displacement specified on the other end to make it buckle.
I have pretty much tried all options. These were:
i) Linear buckling (Eigenbuckling)
ii) Displacement controlled buckling with a lateral point force to provide eccentricity/imperfection.
iii)Force controlled buckling with, again, a lateral point force (arc-length method)