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RESEARCH PAPERS

Theoretical Study of the Dynamic Tensile Test

[+] Author and Article Information
G. Regazzoni, J. N. Johnson, P. S. Follansbee

Los Alamos National Laboratory, Los Alamos, New Mexico 87545

J. Appl. Mech 53(3), 519-528 (Sep 01, 1986) (10 pages) doi:10.1115/1.3171805 History: Received June 25, 1985; Revised March 31, 1986; Online July 21, 2009

Abstract

A numerical investigation of the tensile test using a finite-difference, one-dimensional elasto-viscoplastic code is presented. The influence of strain rate, strain rate sensitivity, and inertia on the development of the axial particle velocity, stress, strain, and strain rate profiles in pure copper is studied. The initial stages of post-uniform deformation and the stabilizing influence of inertia and strain rate sensitivity in this regime are demonstrated. Both inertia and strain rate sensitivity are shown to decrease the rate of unloading of the uniform region of a tensile specimen past the point of instability given by the maximum load criterion. A comparison of numerically predicted and experimentally determined values of the post-uniform elongation is shown.

Copyright © 1986 by ASME
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