Penetration of Strain-Hardening Targets With Rigid Spherical-Nose Rods

[+] Author and Article Information
M. J. Forrestal, V. K. Luk

Sandia National Laboratories, Albuquerque, NM 87185

N. S. Brar

University of Dayton Research Institute, Dayton, OH 45469

J. Appl. Mech 58(1), 7-10 (Mar 01, 1991) (4 pages) doi:10.1115/1.2897183 History: Received February 03, 1989; Revised January 19, 1990; Online March 31, 2008


We developed engineering models that predict forces and penetration depth for long, rigid rods with spherical noses and rate-independent, strain-hardening targets. The spherical cavity expansion approximation simplified the target analysis, so we obtained closed-form penetration equations that showed the geometric and material scales. To verify our models, we conducted terminal-ballistic experiments with three projectile geometries made of maraging steel and 6061-T651 aluminum targets. The models predicted penetration depths that were in good agreement with the data for impact velocities between 0.3 and 1.0 km/s.

Copyright © 1991 by The American Society of Mechanical Engineers
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