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RESEARCH PAPERS

Roughness-Induced Dynamic Loading at Dry and Boundary-Lubricated Sliding Contacts

[+] Author and Article Information
A. Soom

Department of Mechanical and Aerospace Engineering, State University of New York at Buffalo, Buffalo, NY 14260

C. Kim

Department of Mechanical Engineering, Kyungbook University, Taegu, Korea

J. of Lubrication Tech 105(4), 514-517 (Oct 01, 1983) (4 pages) doi:10.1115/1.3254655 History: Received February 25, 1981; Online November 13, 2009

Abstract

Measurements of instantaneous normal and frictional forces have been made at smoothly sliding hemispherical steel contacts under nominally dry and boundary-lubricated conditions. Normalized contact force fluctuations generated by surface irregularities are presented. Instantaneous frictional relations are characterized by performing spectral and transfer function computations on the measured signals. The qualitative dynamic frictional behavior is shown to be similar at dry and boundary-lubricated contacts. However, the magnitude of the dynamic loading is considerably reduced in the presence of lubrication. In both cases, an apparent time-varying frictional behavior is found to exist.

Copyright © 1983 by ASME
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