Plastic Buckling Transition Modes in Moderately Thick Cylindrical Shells
Publication: Journal of Engineering Mechanics
Volume 125, Issue 4
Abstract
Moderately thick perfect cylindrical shells under axial compression first exhibit an axisymmetric buckling mode, where a localization of buckling patterns, referred to as an elephant foot bulge, is caused by the first plastic bifurcation. However, the transition from the axisymmetric buckling mode to a nonaxisymmetric buckling mode, referred to as a diamond buckling mode, may occur due to the next bifurcation if we continue the loading under displacement control. Herein, this phenomenon is examined, based on a rigorous plastic bifurcation analysis. As a result, it is observed that the circumferential wave number of the diamond buckling mode increases with the decrease of the wall thickness. The boundary conditions also considerably influence the occurrence of diamond buckling. It is found that the strain concentration is intensified for the diamond buckling modes, compared with the axisymmetric modes.
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Published In
Journal of Engineering Mechanics
Volume 125 • Issue 4 • April 1999
Pages: 426 - 434
History
Received: Mar 19, 1998
Published online: Apr 1, 1999
Published in print: Apr 1999
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