I wonder if it is possible to run post-buckling analysis at COSMOS
I've already started using the non-linear solvers static and
dynamic. When I control the force calculations stop when buckling
occures that I think is the result of some singularites. It allows
me to find the buckling (critical) load however do not show the
I've started control the load by arc-length basing on the
information presented in Cosmos Tutorials and sometimes go further
with the load. However, I still have problems with interpreting the
results. Is the decrease of the load means buckling? It not always
very sharp decrease as I expected from real-life experiments.
I know it is a very difficult subject but I'd would be grateful for
any comments and suggestions.
PS. My interests are cold-formed thin-walled beams but also
rotomoulded tanks made of polyethylene