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RESEARCH PAPERS

Some Parameters Affecting Tactile Friction

[+] Author and Article Information
O. S. Dinç

Department of Mechanical Engineering, Technical University of Istanbul, Istanbul, Turkey

C. M. Ettles, S. J. Calabrese, H. A. Scarton

Department of Mechanical Engineering, Aeronautical Engineering & Mechanics, Rensselaer Polytechnic Institute, Troy, New York 12180-3590

J. Tribol 113(3), 512-517 (Jul 01, 1991) (6 pages) doi:10.1115/1.2920653 History: Received March 14, 1990; Revised June 11, 1990; Online June 05, 2008

Abstract

The friction of a sliding tactile contact was measured in an apparatus which simulated a keyboard. Results were taken for several materials. The friction coefficient was found to decrease with increasing load and with increasing speed. Experiments at varying humidity and surface roughness helped to define the friction mechanisms. It is concluded that tactile friction is predominantly adhesive, but modified by liquid bridging between the ridges of the skin and the counterface. Increased bridging due to higher humidity causes increased friction from viscous shearing effects, while increased roughness allows fewer bridges to form, decreasing the friction.

Copyright © 1991 by The American Society of Mechanical Engineers
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