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RESEARCH PAPERS

Large Strain, High Strain Rate Testing of Copper

[+] Author and Article Information
U. S. Lindholm

Department of Materials Sciences, Southwest Research Institute, San Antonio, Texas 78284

A. Nagy

Southwest Research Institute, San Antonio, Texas 78284

G. R. Johnson, J. M. Hoegfeldt

Honeywell Incorporated, Defense Systems Division, Hopkins, Minn. 55343

J. Eng. Mater. Technol 102(4), 376-381 (Oct 01, 1980) (6 pages) doi:10.1115/1.3224827 History: Received June 09, 1980; Online September 15, 2009

Abstract

This paper describes the development of a high-speed torsional testing machine and results obtained on the strain-rate dependent strength of copper at large shear strains. Test techniques and data obtained are intended to be useful in applications such as ballistics and machining. For copper, the results indicate positive strain hardening behavior to very large strains under low rate, isothermal conditions and the transition to adiabatic thermal softening, shear instability and localization (shear banding) at high rates.

Copyright © 1980 by ASME
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