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RESEARCH PAPERS

A Rate-Dependent Interpretation of the Taylor Impact Test

[+] Author and Article Information
S. E. Jones

The University of Alabama, Tuscaloosa, AL 35487

P. P. Gillis

University of Kentucky, Lexington, KY 40506

J. C. Foster, L. L. Wilson

Air Force Armament Laboratory, Eglin AFB, FL 32542

J. Energy Resour. Technol 111(4), 254-257 (Dec 01, 1989) (4 pages) doi:10.1115/1.3231433 History: Received August 15, 1988; Revised August 28, 1989; Online October 22, 2009

Abstract

A new one-dimensional theory for estimating the dynamic yield strength of materials, based on post-test measurements of Taylor impact specimens, has been developed by the authors. This theory offers the advantage of mathematical simplicity, while requiring only measurements of final specimen length, final undeformed length, and impact velocity as experimental data inputs. It is observed that the theory can accommodate a variety of material constitutive relations while preserving its basic simplicity. In particular, the dynamic material strength on impact, Y , can be directly correlated with impact velocity V through the relation Y = − Y 0 − BV 2 . Here Y 0 is the static yield strength and B is a material constant. This relation provides a rate-dependent constitutive law that is potentially useful in situations such as rod penetration, for example.

Copyright © 1989 by ASME
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