Thermal effects on film thickness and traction in rolling/sliding EHL line contacts - An accurate inlet zone analysis

Abstract

Thermal analysis in an EHL line contact has been obtained using a computational method developed by Elrod and Brewe (NASA Tech. Mem. 88845). Piezoviscous effects have been incorporated using Barus and Roelands' viscosity models for the P-150 oil used in the present analysis. A significant reduction in film thickness and traction at high rolling speeds relative to isothermal conditions has been obtained. Results are presented through figures and tables in the text. The results of the present analysis have been compared with the results of Murch and Wilson (ASME J. Lubr. Technol., 97 (1975) 212), Goksem and Hargreaves (Trans. ASME, 100 (1978) 346) and Ghosh and Hamrock (NASA Tech. Mem. 83424). The thermal effect on film thickness reduction factor C, is expressed in terms of the dimensionless thermal loading parameter Q and slip S as: C=1.0/[1.0+0.133Q0.71(1.0+5.65S0.96)].