Film pressure distributions in point contacts predicted by thermal EHL analyses

• Published in: Tribology international Vol. 39; no. 8; pp. 812 - 819
• Main Authors: Kaneta, Motohiro, Shigeta, Taishi, Yang, Peiran
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 01.08.2006; Elsevier
• Subjects: Applied sciences; Exact sciences and technology; Friction, wear, lubrication; Fundamental areas of phenomenology (including applications); Machine components; Mechanical contact (friction...); Mechanical engineering. Machine design; Physics; Solid mechanics; Structural and continuum mechanics; Lubricating oil; Thermal contact; Point contact; Rolling sliding contact; Pressure distribution; Fatigue; Mechanical contact; Contact surface; Hertzian contact; Contact stress; Sliding contact; Elliptic shape; Thermoelastohydrodynamic lubrication; Contact pressure; Tribology
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2005.07.010

In general, lubricated rolling/sliding contact fatigue problems have been investigated by assuming Hertzian contact pressure distributions. In this paper, thermal EHL analyses in consideration of the variations in oil properties in all directions within the film have been carried out under conditions of circular and elliptical contacts. It has been found that the actual film pressure distributions differ markedly from the Hertzian pressure distribution depending on the thermal conductivities of both contacting surfaces, slide–roll ratios and viscosity–pressure coefficients.