Truncation effects on circular EHL contact film thickness

Author:

Patrigeon Tristan1ORCID,Philippon David1,Devaux Nicolas1,Morales-Espejel Guillermo E.12ORCID,Fillot Nicolas1

Affiliation:

1. INSA Lyon, CNRS, LaMCoS, UMR5259, 69621 Villeurbanne, France

2. SKF Research & Technology Development, SKF B.V., Meidoornkade 14, 3992 AE, Houten, The Netherlands

Abstract

Predictions of film thickness in elastohydrodynamic lubricated (EHL) contacts generally rely on the assumption of a semi-infinite equivalent solid to calculate elastic deformations. However, this assumption often fails when the contact is near an edge of one of the solids. This paper explores the impact of a solid edge being close to or within a theoretical EHL contact area on film thickness. We specifically highlight the advantages of a sharp edge over a chamfer, and the non-monotonous effect of the fillet radius on the minimum film thickness. Semi-analytical equations are developed to determine the maximum and minimum lubricant film thickness in a truncated contact and compare numerical results with experimental data in cases involving a chamfer.

Publisher

SAGE Publications

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