Investigation on Plastic Instability of a Thin-Walled Anisotropic Cylindrical Shell Subjected to Internal Impulsive Loading
M. Pang, C.W. Jin, B. L. Hu, Y. Q. Zhang
College of Civil Engineering and Architecture, Hangzhou, China
Keywords: cylindrical shells, instability strain, anisotropic plasticity, impulsive loading
Abstract
The plastic instability of an internally impulsively loaded thin-walled end-closed cylindrical shell with plastic anisotropy is investigated. The cylindrical shell is assumed to be made of a ductile material. Based on Hill's orthogonal anisotropic yield criterion, the instability strain of a thin-walled end-closed cylinder is derived, which takes into account the effects of the plastic orthotropy and strain rate. The numerical analysis of the instability strain is conducted. The results show that the instability strain for a thin-walled end-closed cylindrical shell depends upon the deviation from isotropic plasticity and the strain rate.
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