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RESEARCH PAPERS

The Short-Time Viscosity Behavior of a Lubricant in a Hertzian Pressure Zone

[+] Author and Article Information
E. G. Trachman

Engineering Mechanics Department, Research Laboratories, General Motors Corp., Warren, Mich.

J. of Lubrication Tech 97(3), 486-492 (Jul 01, 1975) (7 pages) doi:10.1115/1.3452641 History: Received March 20, 1974; Online October 18, 2010

Abstract

The variation of the viscosity of a lubricant as it passes through a concentrated contact with a Hertzian pressure profile is predicted by a simple model for the time dependent volume response of a liquid to a sudden change of applied pressure. For a wide range of operating conditions, the computed values of transient viscosity are asymmetric with respect to the center of the contact zone and are significantly lower than the equilibrium values. Three design graphs are presented which allow easy application of the results.

Copyright © 1975 by ASME
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