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Technical Briefs

Steady-State Creep Analysis of Thick-Walled Spherical Pressure Vessels With Varying Creep Properties

[+] Author and Article Information
L. H. You

The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing City 400044, China and NCCA, Bournemouth University, Poole BH12 5BB, United Kingdom

H. Ou

School of Mechanical & Aerospace Engineering, Queen’s University Belfast, Belfast BT9 5AH, United Kingdom

J. Pressure Vessel Technol 130(1), 014501 (Jan 08, 2008) (5 pages) doi:10.1115/1.2826452 History: Received February 16, 2005; Revised March 14, 2007; Published January 08, 2008

Based on basic equations of steady-state creep of spherically symmetric problems, a simple and efficient iterative method is proposed in this paper to determine creep deformations and stresses in thick-walled spherical vessels with varying creep properties subjected to internal pressure. The convergence of the proposed iterative method and the influences of varying and constant material properties on stresses and equivalent strain rate are discussed. How different material parameters involved in Norton’s law affect radial and circumferential stresses together with the equivalent strain rate in thick-walled spherical vessels under internal pressure is investigated.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 1

Effects of material parameter B(r) on equivalent strain rate

Grahic Jump Location
Figure 2

Effects of material parameter n(r) on circumferential stress

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