Bifurcations primaire et secondaires d’un cylindre sous compression axiale
Keywords:
Bifurcation, buckling, elastoplasticity, axially compressed cylindersAbstract
An elastoplastic thin shell finite element model with finite rotations is presented in this paper in order to compute the post-buckling behaviour of shell-type structures. A generalized arc-length method and appropriate continuation methods have been implemented to deal with both limit and bifurcation points. A particular attention is devoted to cylindrical shells under axial compression producing axisymmetric and diamond modes, but also transition modes corresponding to secondary bifurcating branches.
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