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TECHNICAL BRIEFS

The Effect of Periodic Textures on the Static Characteristics of Thrust Bearings

[+] Author and Article Information
Gustavo C. Buscaglia

Centro Atómico Bariloche,  Instituto Balseiro, 8400 Bariloche, Argentinagustavo@cab.cnea.gov.ar

Ionel Ciuperca

CNRS-UMR 5208,  Université Lyon I, Analyse Numérique, F-69622 Villeurbanne, Franceciuperca@maply.univ-lyon1.fr

Mohammed Jai

CNRS-UMR 5208, INSA de Lyon,  Centre de Mathématiques, F-69621 Villeurbanne, FranceMohammed.Jai@insa-lyon.fr

J. Tribol 127(4), 899-902 (Jun 13, 2005) (4 pages) doi:10.1115/1.2033896 History: Received January 11, 2005; Revised June 10, 2005; Accepted June 13, 2005

Given a bearing of some specified macroscopic shape, what is the effect of texturing its surfaces uniformly? Experimental and numerical investigations on this question have recently been pursued, which we complement here with a mathematical analysis based on a seemingly novel combination of homogenization techniques and perturbation analysis. The flow is assumed governed by the Reynolds equation, with cavitation effects disregarded, and the texture length is assumed much smaller than the bearing’s length. The results, which hold true for small-amplitude periodic textures and in the limit of vanishing period, can be summarized as follows: (a) The texture that maximizes the load for a given minimum clearance is no texture at all (i.e., the untextured shape); and (b) the texture that minimizes the friction coefficient is again the untextured shape.

Copyright © 2005 by American Society of Mechanical Engineers
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