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RESEARCH PAPERS

The Penetration of Hard-Steel Spheres Into Plane Metal Surfaces

[+] Author and Article Information
Werner Goldsmith, Peter T. Lyman

University of California, Berkeley, Calif.

J. Appl. Mech 27(4), 717-725 (Dec 01, 1960) (9 pages) doi:10.1115/1.3644088 History: Received January 05, 1960; Online September 16, 2011

Abstract

An experimental investigation was undertaken to determine the force-indentation relations governing the contact of hard-steel balls and plane surfaces of various metals both under static and dynamic conditions, the latter involving the Hopkinson-bar technique, with maximum elastic strain rates of 500 sec−1 . Excellent correlation was obtained between the measured permanent crater diameter at the contact point and that calculated from strain-gage data by means of an equation treating the bar as a one-dimensional member. A comparison also was effected between the static and dynamic force-indentation curves, the Hertz law of contact, and a relation based upon the concept of a constant flow pressure in the plastic regime.

Copyright © 1960 by ASME
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