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RESEARCH PAPERS

A State Variable Interpretation of Some Rate-Dependent Inelastic Properties of Steel

[+] Author and Article Information
B. Larsson, B. Storåkers

Department of Strength of Materials and Solid Mechanics, The Royal Institute of Technology, Stockholm, Sweden

J. Eng. Mater. Technol 100(4), 395-401 (Oct 01, 1978) (7 pages) doi:10.1115/1.3443510 History: Received April 25, 1977; Revised June 15, 1978; Online August 17, 2010

Abstract

Based on a state variable theory proposed by Onat some discriminating creep tests of stainless steel have been designed and carried out at elevated temperature conditions. Quantitative correlations of the results are sought with predictions from a physical theory for recovery creep proposed by Lagneborg. The findings are utilized to interpret the behavior of creeping members when subjected to a rapid increase in the rate of straining. Different approaches toward generalization of physical one-dimensional creep laws to multiaxial stress states are discussed. A tentative constitutive equation applicable to the solution of general boundary value problems is proposed.

Copyright © 1978 by ASME
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