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Isothermal elastohydrodynamic lubrication of point contacts. II - Ellipticity parameter resultsA numerical solution of the isothermal elastohydrodynamic problem for point contacts has been presented which reproduces all the essential features of the previously reported experimental observations based upon optical interferometry. In particular, the two 'side lobes' in which minimum film thickness regions occur are shown to emerge in the theoretical solutions. The influence of the ellipticity parameter upon solutions to the point contact problem has been explored in the present paper. The ellipticity parameter (k) was varied from one (a ball on a plate) to eight (a configuration approaching line contact), and it has been shown that both the central and minimum film thicknesses can be related to the well known line contact solutions by remarkably simple expressions involving either (k) or the effective radius of curvature ratio (Ry/Rx).
Document ID
19760031898
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hamrock, B. J.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Dowson, D.
(Leeds University Leeds, United Kingdom)
Date Acquired
August 8, 2013
Publication Date
October 1, 1975
Subject Category
Mechanical Engineering
Report/Patent Number
ASME PAPER 75-LUB-12
Meeting Information
Meeting: Joint Lubrication Conference
Location: Miami Beach, FL
Start Date: October 21, 1975
End Date: October 23, 1975
Sponsors: American Society of Mechanical Engineers and American Society of Lubrication Engineers
Accession Number
76A14864
Distribution Limits
Public
Copyright
Other

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