Initial Response of a Rock Penetrator

[+] Author and Article Information
D. B. Longcope

Applied Mechanics Division 1281, Sandia Laboratories, Albuquerque, New Mex.

D. E. Grady

Geomechanics Research Division 5136, Sandia Laboratories, Albuquerque, New Mex.

J. Appl. Mech 45(3), 559-564 (Sep 01, 1978) (6 pages) doi:10.1115/1.3424361 History: Received September 01, 1977; Revised February 01, 1978; Online July 12, 2010


An analysis based on elastic rod theory is given for the early-time axisymmetric response of pointed penetrators. Results of measurements by laser interferometry of the back surface particle velocity of laboratory scale penetrators impacted by sandstone targets are presented. Values of the initial pressure on the penetrator tip are determined which give good agreement between the analytical and experimental results. These initial tip pressures are found to be approximated by the stress-particle velocity Hugoniot for the target material.

Copyright © 1978 by ASME
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