Possible Role of Compressional Viscoelasticity in Concentrated Contact Lubrication

[+] Author and Article Information
R. S. Fein

Texaco Research Center, Beacon, N. Y.

J. of Lubrication Tech 89(2), 127-131 (Apr 01, 1967) (5 pages) doi:10.1115/1.3616927 History: Received July 12, 1965; Online July 12, 2011


An equation relating liquid density and viscosity under transient pressure conditions is derived. The derivation combines approximate phenomenological descriptions of the viscoelastic compression of a liquid and the dependence of viscosity on pressure and density. Solutions of the equation for a “step”-pressure increase and a semielliptical pressure cycle show that density and viscosity of Newtonian lubricants may significantly lag pressure transients under concentrated-contact lubrication conditions. Qualitatively, the lag effects appear to account at least partially for anomalous experimental observations involving asperity interactions and elastohydrodynamic lubrication of rollers.

Copyright © 1967 by ASME
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