A Finite Elastoplastic Constitutive Formulation With New Co-rotational Stress-Rate and Strain-Hardening Rule

[+] Author and Article Information
Z. Xia, F. Ellyin

Department of Mechanical Engineering, University of Alberta, Edmonton, AB T6G 2G8, Canada

J. Appl. Mech 62(3), 733-739 (Sep 01, 1995) (7 pages) doi:10.1115/1.2897008 History: Received November 02, 1993; Revised May 10, 1994; Online October 30, 2007


A constitutive model for finite elastoplastic deformations is presented. This model incorporates two novel features: first, a strain-hardening law that is applicable to complex loading paths and histories; and second, an objective stress-rate measure that is based on the spin of an orthogonal triad of material unit vectors which instantaneously coincides with the principal directions of the stress tensor. Problems of shear superposed on triaxial tension, cyclic shear deformation, and biaxial nonproportional loading are studied. It is shown that realistic predictions for the aforementioned problems are obtained by using the proposed constitutive model.

Copyright © 1995 by The American Society of Mechanical Engineers
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