The Isothermal Elastohydrodynamic Lubrication of Spheres

[+] Author and Article Information
H. P. Evans, R. W. Snidle

Department of Mechanical Engineering, and Energy Studies, University College, Cardiff, Wales, U.K.

J. of Lubrication Tech 103(4), 547-557 (Oct 01, 1981) (11 pages) doi:10.1115/1.3251734 History: Received February 20, 1980; Online November 17, 2009


The paper describes a numerical procedure for solving the point-contact elastohydrodynamic lubrication problem under isothermal conditions at moderate loads. Results are presented showing the shape of the film and variation of hydrodynamic pressure. Analysis of results for a range of operating conditions gives the following approximate formulas for minimum and central film thickness, repsectively: Hm = 1.9 M−0.17 L0.34 and Ho = 1.7 M−0.026 L0.40 where H, M, and L are the Moes and Bosma nondimensional groups. In common with earlier solutions based upon the forward-iterative method the solution breaks down under moderately heavily loaded conditions. Ways of extending the solution to heavier loads using the authors’ inverse solution of Reynolds’ equation under point-contact elastohydrodynamic conditions are discussed.

Copyright © 1981 by ASME
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