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Elasto-Plastic Buckling Design for Shallow Cylindrical Shells under External Pressure

by Seishi Yamada, Toyohashi Univ of Technology, Toyohashi, Japan,
James G. A. Croll, Toyohashi Univ of Technology, Toyohashi, Japan,



Document Type: Proceeding Paper

Part of: Spatial, Lattice and Tension Structures

Abstract:

Pressures providing elastic-plastic buckling conditions for thin shallow cylindrical shell panels are presented. Classical simple support boundary conditions have been adopted for the shells. First surface yield analysis using the elastic, fully non-linear, Ritz method and the von Mises hypothesis of plastic yield, has indicated broadly two types of failure: a mid-shell failure which is very sensitive to imperfections, and; a corner failure which can be closely approximated from a linear bending stress analysis. For mid-shell failure an imperfect, reduced stiffness, model is shown to provide a conservative estimation to the elasto-plastic lower bound pressures.

Subject Headings: Failure analysis | Stress analysis | Linear analysis | Buckling | Structural failures | Shell structures | Elastoplasticity

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