The Effects of Surface Irregularities on the Elastohydrodynamic Lubrication of Sliding Line Contacts. Part II—Wavy Surfaces

[+] Author and Article Information
P. R. Goglia, C. Cusano, T. F. Conry

University of Illinois at Urbana-Champaign, Urbana, Ill. 61801

J. Tribol 106(1), 113-119 (Jan 01, 1984) (7 pages) doi:10.1115/1.3260846 History: Received November 05, 1982; Online October 29, 2009


The micro-EHD effects caused by wavy surfaces have been analytically investigated. The investigation includes the effects of phase, wavelength, and wave amplitude on film thickness, pressure distribution and subsurface octahedral shear stress field. The presence of a wavy surface with a given wavelength produces pressure oscillations of the same wavelength. With increasing wave amplitude and decreasing wavelength, the micro-EHD action increases. This results in a maximum value of the octahedral shear stress which is greater in magnitude and closer to the surface than the corresponding smooth surface case. The slope of the wavy surface in the inlet region determines whether the average film thickness is smaller or larger than the smooth surface value.

Copyright © 1984 by ASME
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