Elastohydrodynamic Lubrication by Powder Slurries

[+] Author and Article Information
D. Y. Hua, M. M. Khonsari

Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, PA 15261

J. Tribol 118(1), 67-73 (Jan 01, 1996) (7 pages) doi:10.1115/1.2837094 History: Received February 15, 1994; Revised November 21, 1994; Online January 24, 2008


Thermoelastohydrodynamic analysis of a powder slurry containing a mixture of MoS2 particles and a carrier fluid is presented for a line-contact configuration. The constitutive equation of the slurry is a non-Newtonian formulation based on experimental data. The model includes provisions for elastic/plastic deformation of particles in the slurry. Through this deformation, particles are shown to contribute to the load-carrying capacity. The viscosity of the carrier fluid is shown to increase considerably as a result of adding a large amount of particles, thus appreciably affecting the EHL behavior of powder slurries. Performance results are presented for the pressure profile, film thickness, temperature distribution, and traction coefficient for a number of sliding/rolling ratios. The existence of particles in slurry is shown to give rise to a higher temperature field and tends to increase the traction coefficient compared to typical shear thinning fluids.

Copyright © 1996 by The American Society of Mechanical Engineers
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