Isothermal Elastohydrodynamic Lubrication of Point Contacts: Part 1—Theoretical Formulation

[+] Author and Article Information
B. J. Hamrock

NASA Lewis Research Center, Cleveland, Ohio

D. Dowson

Leeds University, Leeds, England

J. of Lubrication Tech 98(2), 223-228 (Apr 01, 1976) (6 pages) doi:10.1115/1.3452801 History: Received June 19, 1975; Online October 20, 2010


The analysis of an isothermal elastohydrodynamic lubrication (EHL) point contact was evaluated numerically. This required the simultaneous solution of the elasticity and Reynolds equations. In the elasticity analysis the contact zone is divided into equal rectangular areas and it is assumed that a uniform pressure is applied over each element. In the numerical analysis of the Reynolds’ equation a phi analysis where phi is equal to the pressure times the film thickness to the 3/2 power is used to help the relaxation process. The EHL point contact analysis is applicable for the entire range of elliptical parameters and is valid for any combination of rolling and sliding within the contact.

Copyright © 1976 by ASME
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