Modeling Plastic Deformation of Mild Steel Under Nonproportional Deformation Path

[+] Author and Article Information
A. Gilat

Department of Engineering Mechanics, The Ohio State University, Columbus, OH 43210

J. Eng. Mater. Technol 108(3), 258-261 (Jul 01, 1986) (4 pages) doi:10.1115/1.3225878 History: Received July 24, 1985; Online September 15, 2009


An elastic/viscoplastic theory that includes anisotropic strain hardening is used in the analysis of a nonproportional biaxial torsion-tension loading test. The theory is a combination of the formulation of Perzyna [5] and the anisotropic hardening model of Mróz [6], and is applied in modeling the behavior of mild steel in a nonproportional deformation test reported by Meguid and Malvern [2]. The results show that the theory predicts the material response well. Especially, the theory models adequately the noncoaxiality between the plastic strain rate and the deviatoric stress vectors following an abrupt change in the deformation path.

Copyright © 1986 by ASME
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