Effect of Blunt Chamfers on Contact Pressure Distribution and Elastic Limit

[+] Author and Article Information
H. A. Francis

The Charles Stark Draper Laboratory, Inc., 555 Technology Square, Cambridge, Mass. 02139

J. Appl. Mech 47(3), 656-659 (Sep 01, 1980) (4 pages) doi:10.1115/1.3153749 History: Received February 01, 1980; Revised March 01, 1980; Online July 21, 2009


The interfacial pressure profile is derived analytically, and the elastic load limit is evaluated numerically, for plane strain frictionless elastic contact between a flat surface and a symmetric trapezoidal body whose obtuse corners are replaced by tangent circular arcs. The shape of the pressure distribution depends only on plateau and arc widths. The results enable design of radiused chamfers to give peak-to-mean pressure ratios as low as 1.2 and elastic mean pressure limits up to 1.5 times the yield stress. Conversely, the pressure peak and elastic limit can be predicted for any microscopically blunt chamfer.

Copyright © 1980 by ASME
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