Stribeck Friction Curve in Point EHL Contacts

The ultra thin film interferometry and conventional optical interferometry techniques are used to measure the central film thickness and friction force as a function of the dimensionless speed parameter. Experiments were conducted in point contacts with a mineral bright stock oil and a disk-like che...

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Bibliographic Details
Published inTribology Online Vol. 1; no. 1; pp. 1 - 4
Main Authors Nishikawa, Hiroshi, Kaneta, Motohiro
Format Journal Article
LanguageEnglish
Published Japanese Society of Tribologists 2006
Subjects
film thickness
friction coefficient
lubrication regime
point contact
Stribeck friction curve
surface roughness
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Summary:The ultra thin film interferometry and conventional optical interferometry techniques are used to measure the central film thickness and friction force as a function of the dimensionless speed parameter. Experiments were conducted in point contacts with a mineral bright stock oil and a disk-like chemical compound by changing the temperature, entrainment velocity and surface roughness at a fixed slide-roll ratio. It has been found that the friction coefficient curve, i.e., the relationship between the friction coefficient and the dimensionless speed parameter, changes depending on lubrication regimes, even when the relationship between the central film thickness and the dimensionless speed parameter obeys EHL theory.
ISSN:1881-2198
1881-2198
DOI:10.2474/trol.1.1