P. Kumar et al., Study of surface roughness effects in elastohydrodynamic lubrication of rolling line contacts using a deterministic model, TRIBOL INT, 34(10), 2001, pp. 713-722
A sinusoidal surface roughness model is adopted for the analysis of the eff
ects of roughness amplitude and wavelength on pressure profile, film shape,
minimum film thickness and coefficient of friction in a steady state EHL l
ine contact. The influence coefficients used for the evaluation of surface
displacements are calculated by utilizing a numerical method based on Fast
Fourier Transform. Significant reduction is observed in the minimum film th
ickness due to surface rough-ness. Such reduction is quantified by roughnes
s correction factor, CR, and a relationship between C, and non-dimensional
surface roughness amplitude A is derived as: C-R=1-0.7823A(0.8213). This eq
uation may prove to be of interest from designer's viewpoint. The friction
coefficient is found to increase appreciably with increasing amplitude and
decreasing wavelength of surface roughness. (C) 2001 Elsevier Science Ltd.
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