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Influence of surface roughness in TEHL with non-Newtonian liquid/solid lubricants under sudden load change
Author(s)
Aiumpornsin, Chatchai
Date Issued
May 16, 2008
Type
Conference Paper
Abstract
This paper describes the influence of surface roughness on thermoelastohydrodynamic (TEHL) lubrication characteristics of a sliding line contact under sudden load change. The surface roughness is a harmonic wave in the transverse direction. The time-dependent Reynolds equation with non-Newtonian liquid-solid fluids has been formulated using a power law model. The constitutive equation of the liquid-solid lubricants was formulated based on experimental data. The simultaneous systems of modified Reynolds, elasticity and energy equations with initial conditions were solved numerically. The static and dynamic characteristics of the thermoelastohydrodynamic line contact with rough surfaces under sudden load change have been investigated numerically to determine the distribution of pressure, film thickness and temperature. The transient response of the lubricated line contact between a infinitely long cylinder surface and a flat plate was simulated under a heavy step load function. This simulation showed a significant effect of surface roughness and solid particles on thermoelastohydrodynamic lubrication under sudden load change. Copyright © 2007 by ASME.
Citation
2007 Proceedings of the ASME STLE International Joint Tribology Conference Ijtc 2007, PART A, 171-173, 2008