We report measurements of the effective tensile strength of commercial “multigrade” oils (in the SAE viscosity grades 5W-30 and 10W-40) over a range of temperatures , which are representative of those encountered under their normal operating conditions (in the range ). Also reported are the values of that are obtained for Newtonian silicone oils over a range of shear viscosities. In the experiments reported herein, samples of liquid are subjected to dynamic stressing by a pressure-tension cycle, this being a feature of the conditions experienced by a lubricant within a dynamically loaded journal bearing and the method used to estimate avoids reliance on direct measurements of substantial dynamic tensions using conventional pressure transducers.
Issue Section:
Technical Papers
Keywords:
lubricating oils,
cavitation,
tensile strength,
viscosity,
pressure transducers,
bubbles,
Effective Tensile Strength,
Cavitation,
Cavitation Threshold,
Dynamic Stressing
Topics:
Cavitation,
Oils,
Petroleum,
Pressure,
Temperature,
Tensile strength,
Tension,
Viscosity,
Cycles,
Bubbles
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.Copyright © 2005
by American Society of Mechanical Engineers
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