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RESEARCH PAPERS

A State Variable Modeling of Plasticity and Necking Under Uniaxial Tension

[+] Author and Article Information
G. Ferron, H. Karmaoui Idrissi, A. Zeghloul

Laboratoire de Physique et Mécanique des Matériaux, Université de Metz, Ile du Saulcy, 57045 Metz Cedex 1, France

J. Eng. Mater. Technol 114(4), 378-383 (Oct 01, 1992) (6 pages) doi:10.1115/1.2904188 History: Received January 01, 1991; Revised February 27, 1992; Online April 29, 2008

Abstract

Constitutive equations based on a state variable modeling of the thermo-viscoplastic behavior of metals are discussed, and incorporated in an exact, long-wavelength analysis of the neck-growth process in uniaxial tension. The general formalism is specialized to the case of f.c.c. metals in the range of intragranular, diffusion controlled plastic flow. The model is shown to provide a consistent account of aluminum behavior both under constant strain-rate and creep. Calculated uniaxial tensile ductilities and rupture lives in creep are also compared with experiments.

Copyright © 1992 by The American Society of Mechanical Engineers
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