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RESEARCH PAPERS

Finite Element Analysis of Residual Stresses in Threaded End Closures

[+] Author and Article Information
A. Chaaban, U. Muzzo

Department of Mechanical Engineering, Ecole Polytechnique of Montreal, Montreal, Canada

J. Pressure Vessel Technol 113(3), 398-401 (Aug 01, 1991) (4 pages) doi:10.1115/1.2928773 History: Received March 21, 1990; Revised September 05, 1990; Online June 17, 2008

Abstract

Due to the high stress concentration at the root of the first active thread in threaded end closures of high pressure vessels, yielding may occur in this region during the application of the first pressure cycle or proof testing. This overstraining introduces residual stresses that influence the fatigue performance of the vessel. This paper presents a parametric analysis of threaded end closures using elastic and elasto-plastic finite element solutions. The results are used to discuss the influence of these residuals on the estimated fatigue life when the vessel is subjected to repeated internal pressure. A simple empirical method to allow for the Bauschinger effect of the material is also proposed.

Copyright © 1991 by The American Society of Mechanical Engineers
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