Regimes of Traction in Concentrated Contact Lubrication

[+] Author and Article Information
S. Bair, W. O. Winer

School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Ga. 30332

J. of Lubrication Tech 104(3), 382-386 (Jul 01, 1982) (5 pages) doi:10.1115/1.3253226 History: Received April 20, 1981; Online November 13, 2009


Experimental evidence is presented for the existence of three regimes of traction in concentrated contacts. Data were obtained in a rolling contact simulator by varying the lubricant, temperature, rolling speed, load and surface roughness at a fixed slide-to-roll ratio. In one regime, the traction is mainly governed by the limiting shear stress of the lubricant. At lower thicknesses (Λ < 1) the mixed regime is encountered and traction is increased due to asperity interaction. At higher film thicknesses, the lubricant pressure is distributed over a greater area than the Hertzian region resulting in a lower average pressure and reduced traction.

Copyright © 1982 by ASME
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