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RESEARCH PAPERS

Obtaining Residual Stresses in Metal Forming After Neglecting Elasticity on Loading

[+] Author and Article Information
Yong-Shin Lee, Paul R. Dawson

Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853

J. Appl. Mech 56(2), 318-327 (Jun 01, 1989) (10 pages) doi:10.1115/1.3176086 History: Received April 04, 1988; Revised June 10, 1988; Online July 21, 2009

Abstract

A methodology for computing residual stresses in forming operations is examined in which the elasticity is neglected during the loading phase of the operation. The elastic response is recovered on unloading through the analysis of an initially-stressed body. Two examples are presented which provide a quantitative assessment of the accuracy of the approach. The first is the axisymmetric expansion of a thick-walled tube. In this case the residual stresses are compared to those computed with an elastic-plastic analysis for both the loading and unloading phases. The second example is a ring upsetting application that has been analyzed using a finite element formulation and for which there are experimental data available for comparison.

Copyright © 1989 by ASME
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