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RESEARCH PAPERS

An Axisymmetric Method of Elastic-Plastic Analysis Capable of Predicting Residual Stress Field

[+] Author and Article Information
H. Jahed, R. N. Dubey

Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario N2L 3E5, Canada

J. Pressure Vessel Technol 119(3), 264-273 (Aug 01, 1997) (10 pages) doi:10.1115/1.2842303 History: Received February 15, 1996; Revised January 10, 1997; Online February 11, 2008

Abstract

Linear elastic solution of an axisymmetric boundary value problem is used as a basis to generate its inelastic solution. This method treats the material parameters as field variables. Their distribution is obtained as a part of solution in an iterative manner. Two schemes of updating material parameters are discussed and compared. A procedure for calculation of residual stress field is presented. Application of the method to autofrettage is presented. Residual stress calculation based on actual material curve, isotropic and kinematic hardening models, and variable Bauschinger effect factor (BEF) is carried out. It is concluded that consideration of dependency of BEF on plastic strain makes significant changes to residual hoop stress near the bore for low-level autofrettage. However, this dependency is insignificant for high-level autofrettage. Results obtained here are shown to be in good agreement with experimental and finite element results.

Copyright © 1997 by The American Society of Mechanical Engineers
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