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Strength differential effect and influence of strength criterion on burst pressure of thin-walled pipelines
Authors:Cheng-wu Jin  Li-zhong Wang  Yong-qiang Zhang
Institution:1. Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, P. R. China; 2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, P. R. China
Abstract:In the framework of the finite deformation theory, the plastic collapse analysis of thin-walled pipes subjected to the internal pressure is conducted on the basis of the unified strength criterion (USC). An analytical solution of the burst pressure for pipes with capped ends is derived, which includes the strength differential effect and takes the influence of strength criterion on the burst pressure into account. In addition, a USC-based analytical solution of the burst pressure for end-opened pipes under the internal pressure is obtained. By discussion, it is found that for the end-capped pipes, the influence of different yield criteria and the strength differential effect on the burst pressure are significant, while for the end-opened pipes, the burst pressure is independent of the specific form of the strength criterion and strength difference in tension and compression.
Keywords:burst pressure  unified strength criterion  thin-walled pipe  finite strain  initial value problem  integro-partial differential equation  classical solution  
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