This paper presents a numerical solution for the elastohydrodynamic lubrication in point contacts, using optically measured three-dimensional rough surface profiles as input data. The multi-grid computer program originally developed by Ai and Cheng (1993, 1994) is modified, so that both contacting surfaces can be three-dimensional measured rough surfaces moving at different velocities. Many different engineering surfaces are measured and analyzed in the present study, demonstrating that the numerical analysis is practical for real surfaces of bearings, cams, gears and other components, as long as a significant EHL film still exists. In addition, discussions are given in this paper for the effects of three-dimensional rough surface topography, which is related to machining process. It appears that, for the circular contact cases analyzed, surface roughness texture and orientation do not have a significant effect on the average film thickness, but they do affect the maximum pressure peak height and asperity deformation in the contact zone considerably.
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July 1997
Research Papers
Point Contact EHL Based on Optically Measured Three-Dimensional Rough Surfaces
Dong Zhu,
Dong Zhu
Eaton Corporation, Corporate R & D Detroit Center, 26201 Northwestern Highway, Southfield, MI 48037
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Xiaolan Ai
Xiaolan Ai
Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208
Search for other works by this author on:
Dong Zhu
Eaton Corporation, Corporate R & D Detroit Center, 26201 Northwestern Highway, Southfield, MI 48037
Xiaolan Ai
Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208
J. Tribol. Jul 1997, 119(3): 375-384 (10 pages)
Published Online: July 1, 1997
Article history
Received:
February 19, 1996
Revised:
June 1, 1996
Online:
January 24, 2008
Citation
Zhu, D., and Ai, X. (July 1, 1997). "Point Contact EHL Based on Optically Measured Three-Dimensional Rough Surfaces." ASME. J. Tribol. July 1997; 119(3): 375–384. https://doi.org/10.1115/1.2833498
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