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RESEARCH PAPERS

Design Variation Simulation of Thick-walled Cylinders

[+] Author and Article Information
R. J. Eggert

Mechanical Engineering Department, Union College, Schenectady, NY 12308

J. Mech. Des 117(2A), 221-228 (Jun 01, 1995) (8 pages) doi:10.1115/1.2826126 History: Received July 01, 1993; Revised June 01, 1994; Online December 11, 2007

Abstract

Thick-walled cylinders exposed to high, static internal pressures may experience both elastic and plastic deformation. Primary design considerations include loads, geometry and material properties. However, variations in geometry and material properties due to conventional manufacturing processes, and variations of internal pressure due to actual usage patterns, propagate through the system resulting in off-design stresses and strains which may cause failure. These variations can be evaluated using probabilistic methods which are discussed in this paper. Von Mises-distortion energy yield theory is presented to predict elastic, plastic and residual stresses in thick-walled cylinders. The design variation simulation method using Monte Carlo simulation and available statistical information is used to design a pressure vessel for servo-hydraulic experiments. The use of autofrettage to induce favorable compressive stresses at the inner bore, thereby improving the margin of safety and overall reliability, is also presented.

Copyright © 1995 by The American Society of Mechanical Engineers
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