With optical interferometry technique, an interesting multi-dimple phenomenon has been discovered under pure-sliding conditions in the point contact between a glass disk and a 3-inch diameter steel ball. At low sliding speeds, two or three stable dimples can be generated in the contact, but at higher sliding speeds, such multi-dimples become unstable. At even higher sliding speeds, however, dimples become stable again, but two dimples become single dimple, or three become two. Numerical solutions of the steady-state thermal elastohydrodynamic lubrication (EHL) theory based on the Newtonian flow model can simulate the stable multi-dimples very well. By changing the slide-roll conditions from pure-rolling to pure-sliding, the theoretical analysis shows clearly that the stable multi-dimples are produced by the thermal effect through the familiar EHL pressure spike.
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April 2003
Technical Papers
Formation Mechanism of Steady Multi-Dimples in Thermal EHL Point Contacts
M. Kaneta,
M. Kaneta
Department of Mechanical and Control Engineering, Kyushu Institute of Technology, Sensuicho, Tobata, Kitakyushu 804-8550, Japan
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P. Yang
P. Yang
Department of Mechanical and Control Engineering, Kyushu Institute of Technology, Sensuicho, Tobata, Kitakyushu 804-8550, Japan
Search for other works by this author on:
M. Kaneta
Department of Mechanical and Control Engineering, Kyushu Institute of Technology, Sensuicho, Tobata, Kitakyushu 804-8550, Japan
P. Yang
Department of Mechanical and Control Engineering, Kyushu Institute of Technology, Sensuicho, Tobata, Kitakyushu 804-8550, Japan
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division June 28, 2001 revised manuscript received July 2, 2002. Associate Editor: C. H. Venner.
J. Tribol. Apr 2003, 125(2): 241-251 (11 pages)
Published Online: March 19, 2003
Article history
Received:
June 28, 2001
Revised:
July 2, 2002
Online:
March 19, 2003
Citation
Kaneta , M., and Yang, P. (March 19, 2003). "Formation Mechanism of Steady Multi-Dimples in Thermal EHL Point Contacts ." ASME. J. Tribol. April 2003; 125(2): 241–251. https://doi.org/10.1115/1.1506318
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