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RESEARCH PAPERS

A Bounding Surface Theory for Cyclic Thermoplasticity

[+] Author and Article Information
D. L. McDowell

George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332

J. Eng. Mater. Technol. 114(3), 297-303 (Jul 01, 1992) (7 pages) doi:10.1115/1.2904176 History: Received January 01, 1991; Revised January 28, 1992; Online April 29, 2008

Abstract

A nonisothermal, rate and time independent generalization of nonlinear kinematic hardening theory for cyclic plasticity is introduced. The model includes decomposition of backstress and of isotropic hardening between the yield surface radius and the backstress amplitude. A purely temperature dependent component of yield surface radius is assumed in addition to an isotropic hardening component. Issues of thermoplastic material stability and temperature history independence are clearly distinguished and addressed via implications of temperature rate terms. Correlations are reported for OFHC copper subjected to thermomechanical cyclic loading.

Copyright © 1992 by The American Society of Mechanical Engineers
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