An Experimental Investigation Into the Plastic Flow and Strain Hardening of Mild Steel Under Proportional and Abruptly Changing Deformation Paths at a Controlled Rate

[+] Author and Article Information
S. A. Meguid

Applied Mechanics Group, School of Mechanical Engineering, Cranfield Institute of Technology, Cranfield, Bedford, UK

L. E. Malvern

Engineering Sciences Department, University of Florida, Gainesville, Fla.

J. Eng. Mater. Technol 105(3), 147-154 (Jul 01, 1983) (8 pages) doi:10.1115/1.3225634 History: Received June 11, 1982; Online September 23, 2009


Tension-torsion tests are reported on thin-walled tubes up to strains of the order of five percent. Attention was given to the question of whether, as has been suggested, in the continued loading after a sudden direction change in the deformation path, the behavior of the material quickly approaches that predicted by a von Mises plastic potential and isotropic hardening. The results show a slower approach of the deviatoric stress vector direction to the plastic strain-rate vector direction than had been expected, as well as considerable variations in the von Mises equivalent stress versus equivalent plastic strain curves.

Copyright © 1983 by ASME
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