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RESEARCH PAPERS

A Theoretical and Experimental Investigation of Creep Problems With Variable Temperature

[+] Author and Article Information
A. R. S. Ponter

Department of Engineering, University of Leicester, Leicester, LE1 7RH, England

M. H. Walter

Reactor Equipment Ltd., Whetstone, Leicester, England

J. Appl. Mech 43(4), 639-644 (Dec 01, 1976) (6 pages) doi:10.1115/1.3423947 History: Received November 01, 1975; Revised May 01, 1976; Online July 12, 2010

Abstract

Rapid cycling solutions are presented for a simple two-bar structure subjected to variable temperature. Three constitutive relationships are considered, nonlinear viscous, strain-hardening and Bailey-Orowan models which describe differing aspects of the creep of metals. It is shown that the solutions for the viscous and strain-hardening relations are essentially similar and possess distinct reference stress histories over ranges of the governing parameters. The presence of recovery in the Bailey-Orowan model causes a distinctly different mode of behavior. Experimental results on a simulated two-bar structure are presented, under conditions where the strain-hardening hypothesis may be expected to be most relevant. Good agreement is obtained between theory and experiment although the presence of anelastic creep, with a short time scale, tends to reduce the effective thermoelastic stresses.

Copyright © 1976 by ASME
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