Abstract
Cylindrical shells subjected to lateral loads buckle in shear or bending modes. The bending buckling mode results in a diamond-shaped pattern or elephant-foot bulge at the edge. In this paper, by developing a special-purpose finite-element analysis program using the 8-node isoparametric shell element, the postbuckling behaviors and residual deformations under cyclic lateral loading are investigated in both shear buckling and bending buckling cases. The shear buckling patterns on the shell change according to the direction of loading in the shear buckling case. In the bending buckling case, shear mode also appears in addition to elephant-foot bulge.
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