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@article{Cann:1995:10.1016/S0167-8922(08)70627-8,
author = {Cann, PM and Spikes, HA},
doi = {10.1016/S0167-8922(08)70627-8},
journal = {Tribology Series},
pages = {161--166},
title = {Visualisation of starved grease and fluid lubricant films},
url = {http://dx.doi.org/10.1016/S0167-8922(08)70627-8},
volume = {30},
year = {1995}
}
TY - JOUR
AB - Most grease lubricated applications operate under starved conditions as there is usually no mechanism to continually resupply the contact with bulk grease. Consequently the grease is rapidly pushed to the side of the track where it is thought to act as a reservoir supplying oil to the contact (3). Recent work (5) has shown that grease lubricant films measured under such conditions in a rolling contact have two Theologically distinct components; a solid surface film of deposited thickener particles, which is augmented by a hydrodynamically generated film from base oil either in the track or supplied from the grease reservoir. The resulting film thickness represents a balance between increasing bulk starvation, deposition of shear degraded grease thickener within the track and oil replenishment from the grease reservoir. All these effects are time, speed and temperature dependent. It is impossible therefore to predict film thickness from simple rheological properties or from classical elastohydrodynamic theory using the base oil viscosity. These effects have been studied in a series of papers in which grease film thickness has been measured with time and rolling speed for the fully starved condition in a model rolling contact (4)(5)(6). The current paper provides visual evidence for some of the proposed mechanisms by direct observation of the changes in the grease track using spacer layer imaging. © 1995 Elsevier Science B.V.
AU - Cann,PM
AU - Spikes,HA
DO - 10.1016/S0167-8922(08)70627-8
EP - 166
PY - 1995///
SN - 0167-8922
SP - 161
TI - Visualisation of starved grease and fluid lubricant films
T2 - Tribology Series
UR - http://dx.doi.org/10.1016/S0167-8922(08)70627-8
VL - 30
ER -