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Journal of Applied Mechanics and Technical Physics

2020 year, number 6

Investigation of Burst Failure of a Thick-Walled Spherical Vessel with Plastic Orthotropy under Internal and External Pressures

J. Zheng1, Ya. Hu2
1Center for Hypergravity Experimental and Interdisciplinary Research, Zhejiang University, Hangzhou, China
2College of Computer Science and Technology, Zhejiang University of Technology, Hangzhou, China
Keywords: thick-walled spherical vessel, burst pressure, plastic orthotropy, plastic collapse


Based on Hill's anisotropic theory, theoretical solutions for the burst pressure and the corresponding equivalent stresses and strains for a thick-walled spherical pressure vessel made of a ductile material with plastic orthotropy are obtained. The effects of the plastic orthotropy, strain hardening, ratio of the external to internal radius of the vessel, and external pressure on the burst pressure is considered. It is found that the external pressure affects the burst pressure, while the corresponding equivalent stresses and strains have nothing to do with the external pressure.