A Grubin-like EHD inlet analysis utilizing a non-linear viscous fluid model with a limiting shear stress is reported. The shear rheological equation requires only a low shear stress viscosity and the limiting shear stress both functions of pressure. Values employed for these properties are taken from measurements on typical lubricants. Reductions of EHD film thickness are found to be up to 40 percent compared with the standard Grubin prediction for typical operating conditions. Slide-roll ratio, limiting shear stress dependence on pressure, and atmospheric pressure value of limiting shear stress are new variables required to determine film thickness with the first two being more important than the last. The EHD film thickness is reduced by increasing slide-roll ratio and/or decreasing the pressure dependence of the limiting shear stress.
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April 1980
This article was originally published in
Journal of Lubrication Technology
Research Papers
Lubricant Limiting Shear Stress Effect on EHD Film Thickness
B. Gecim,
B. Gecim
School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Ga. 30332
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W. O. Winer
W. O. Winer
School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Ga. 30332
Search for other works by this author on:
B. Gecim
School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Ga. 30332
W. O. Winer
School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Ga. 30332
J. of Lubrication Tech. Apr 1980, 102(2): 213-220 (8 pages)
Published Online: April 1, 1980
Article history
Received:
July 12, 1979
Online:
November 17, 2009
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Citation
Gecim, B., and Winer, W. O. (April 1, 1980). "Lubricant Limiting Shear Stress Effect on EHD Film Thickness." ASME. J. of Lubrication Tech. April 1980; 102(2): 213–220. https://doi.org/10.1115/1.3251474
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