Elastoplastic buckling of functionally graded cylindrical shells

Abstract

Abstract: The elastoplastic buckling behaviors of functionally graded materials (FGM)cylindrical shells under uniform axial compression are investigated. Based on the linear mixed enhanced elastoplastic model, material properties and elastoplastic constitutive equations of the FGM are given. Then, Hamilton principle is introduced, and the elastoplastic buckling is simultaneously transformed into solving eigenvalue in symplectic space. Furthermore, critical buckling loads corresponding to generalized eigenvalues of canonical equation are calculated by the bifurcation condition,and locations of the elastoplastic interface are obtained by combining the yield condition. The effects of material gradient parameters and structural geometry parameters on the critical loads and the elastoplastic interfaces are discussed.

Key words: functionally graded materials, elastoplastic buckling, symplectic method, axial compression

CLC Number:

O343

ZHANG Jing-hua, ZHENG Wu. Elastoplastic buckling of functionally graded cylindrical shells[J]. Journal of Lanzhou University of Technology, 2021, 47(5): 167-172.

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