The Spacer Layer Imaging method has been used to investigate the influence of three-dimensional roughness features on the thickness and shape of elastohydrodynamic (EHL) films. An array of near-hemispherical bumps was employed to represent asperities. A micro-EHL film developed at the bumps whose orientation depended on that of the inlet boundary at the location at which the bump had entered the contact. Rolling-sliding conditions induced a micro-EHL film with a classical horseshoe shape at the bumps. The flow of lubricant around the bumps appeared to differ between thin and thick films.
The Effects of Three-Dimensional Model Surface Roughness Features on Lubricant Film Thickness in EHL Contacts
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division March 27, 2002 revised manuscript received October 22, 2002. Associate Editor: C. H. Venner.
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Choo , J. W., Glovnea , R. P., Olver , A. V., and Spikes, H. A. (June 19, 2003). "The Effects of Three-Dimensional Model Surface Roughness Features on Lubricant Film Thickness in EHL Contacts ." ASME. J. Tribol. July 2003; 125(3): 533–542. https://doi.org/10.1115/1.1538617
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