A Large Deformation Plasticity Model With Rate Sensitivity and Thermal Softening

[+] Author and Article Information
D. W. Nicholson, K. C. Kiddy

Naval Surface Weapons Center, White Oak, Silver Spring, MD 20910

J. Eng. Mater. Technol 106(4), 388-392 (Oct 01, 1984) (5 pages) doi:10.1115/1.3225735 History: Received June 25, 1984; Online September 15, 2009


In this paper, a previously published small deformation constitutive model with rate sensitive plasticity and thermal softening is extended to large deformation. The extended model appears suitable for describing a deleterious thermoplastic process manifested by adiabatic shear banding in materials such as titanium under severe dynamic loads. The nature of the instability admitted by the model is described. Also, calculations are reported on the rapid extension of a titanium strip. For applied stresses several times the yield stress, a deleterious temperature is attained in times of the order of 10−2 s.

Copyright © 1984 by ASME
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