This paper describes an experimental study on dimple formation under elastohydrodynamic lubrication (EHL) conditions. The oil film thickness between a ball surface and a glass disk was measured using optical interferometry, and the temperatures of both the surfaces and of the oil film averaged across it were measured using an infrared emission technique. It was found that the temperature profile across the oil film varies abruptly along the sliding direction, and the Couette flow decreases due to the viscosity wedge action as the oil flow is close to the dimple zone. The maximum temperature rise in the dimple zone sometimes reached over 400 K, thus, the phase transition of the oil from liquid to glass may not occur.
1.
Dowson
, D.
, and Higginson
, G. R.
, 1959
, “A Numerical Solution to the Hydrodynamic Problem
,” J. Mech. Eng. Sci.
1
, pp. 6
–15
.2.
Crook
, A. W.
, 1961
, “The Lubrication Rollers III. A Theoretical Discussion of Friction and the Temperatures in the Oil Film
,” Proc. R. Soc. London, Ser. A
, 254
, pp. 237
–258
.3.
Gohar
, R.
, and Cameron
, A.
, 1963
, “Optical Measurement of Oil Film Thickness under Elastohydrodynamic Lubrication
,” Nature (London)
, 200
, pp. 458
–459
.4.
Sanborn
, D. M.
, and Winer
, W. O.
, 1971
, “Fluid Rheological Effects in Sliding Elastohydrodynamic Point Contacts with Transient Loading: 1—Film Thickness
,” Trans. ASME. J. Lubr. Technol.
, 93
, pp. 262
–271
.5.
Turchina
, V.
, Sanborn
, D. M.
, and Winer
, W. O.
, 1974
, “Temperature Measurements in Sliding Elastohydrodynamic Point Contacts
,” Trans. ASME. J. Lubr. Technol.
, 96
, pp. 464
–471
.6.
Ausherman
, V. K.
, Nagaraj
, H. S.
, Sanborn
, D. M.
, and Winer
, W. O.
, 1976
, “Infrared Temperature Mapping in Elastohydrodynamic Lubrication
,” Trans. ASME. J. Lubr. Technol.
, 98
, pp. 236
–243
.7.
Cheng
, H. S.
, and Sternlicht
, B.
, 1965
, “A Numerical Solution for the Pressure, Temperature, and Film Thickness between Two Infinitely Long, Lubricated Rolling and Sliding Cylinders, under Heavy Loads
,” Trans. ASME, J. Bas. Eng.
, 87
, pp. 695
–707
.8.
Cheng
, H. S.
, 1965
, “A Refined Solution to the Thermal-Elastohydrodynamic Lubrication of Rolling Sliding Cylinders
,” ASLE Trans.
, 8
, pp. 397
–410
.9.
Dowson
, D.
, and Whitaker
, A. V.
, 1965
–66, “A Numerical Procedure for the Solution of the Elastohydrodynamic Problem of Rolling and Sliding Contacts Lubricated by a Newtonian Fluid
,” Proc. Inst. Mech. Eng.
, 180
, pp. 57
–71
.10.
Yang
, P.
, and Wen
, S.
, 1990
, “A Generalized Reynolds Equation for Non-Newtonian Thermal Elastohydrodynamic Lubrication
,” Trans. ASME, J. Tribol.
, 112
, pp. 631
–636
.11.
Cameron
, A.
, 1951
, “Hydrodynamic Lubrication of Rotating Disks in Pure Sliding. A New Type of Oil Film Formation
,” J. Inst. Pet.
, 37
, pp. 471
–486
.12.
El-sisi
, S. I.
, and Shawki
, G. S. A.
, 1960
, “Measurement of Oil-Film Thickness between Discs by Electrical Conductivity
,” Trans. ASME. J. Bas. Eng.
, 82
, pp. 12
–18
.13.
El-sisi
, S. I.
, and Shawki
, G. S. A.
, 1960
, “Performance Characteristics of Lubrication Oil Film between Rotating Discs
,” Trans. ASME. J. Bas. Eng.
, 82
, pp. 19
–28
.14.
Dyson
, A.
, and Wilson
, A. R.
, 1968
–69, “Film Thickness in Elastohydrodynamic Lubrication at High Slide Roll Ratios
,” Proc. Inst. Mech. Eng.
, 183
, pp. 81
–97
.15.
Hirano
, F.
, 1971
, “Present State of Researches on Rolling Contact
,” J. Jpn. Soc. Tribol.
, 16
, pp. 535
–546
(in Japanese).16.
Asanabe
, S.
, Ayabe
, H.
, Matsumoto
, S.
, and Kanamaru
, M.
, 1977
, “Lubrication and Wear of Cam-Tappet
,” J. Jpn. Soc. Tribol.
, 22
, pp. 77
–82
(in Japanese).17.
Dyson
, A.
, 1975
, “Scuffing—A Review. Part 2: The Mechanism of Scuffing
,” Tribol. Int.
, 8
, pp. 117
–122
.18.
Ku, P. M., 1979, “Elastohydrodynamic Lubrication—Interaction Between Theory and Practice,” Proceedings of the 6th Leeds-Lyon Symposium on Tribology, pp. 237–249.
19.
Shorgrin, B. A., Jones, W. R. Jr, Kigusbury, E. P., and Prahl, J. M., 1999, “Experimental Determination of Load Carrying Capacity of Point Contact at Zero Entrainment Velocity,” NASA/TM—1999-208848 (1999).
20.
Yagi, K., Kyogoku, K., and Nakahara, T., 2001, “Temperature Measurements of Oil Film and Surface in Point Contact EHL under High Slip Ratio Condition,” Proceedings of the International Tribology Conference Nagasaki 2000, pp. 567–572.
21.
Yang
, P.
, Qu
, S.
, Chang
, Q.
, and Guo
, F.
, 2001
, “On the Theory of Thermal Elastohydrodynamic Lubrication at High Slide-Roll Ratios—Line Contact Solution
,” Trans. ASME, J. Tribol.
, 123
, pp. 36
–41
.22.
Guo
, F.
, Yang
, P.
, and Qu
, S.
, 2001
, “On the Theory of Thermal Elastohydrodynamic Lubrication at High Slide-Roll Ratios—Circular Glass-Steel Contact Solution at Opposite Sliding
,” Trans. ASME, J. Tribol.
, 123
, pp. 816
–821
.23.
Guo
, F.
, Yang
, P.
, and Wong
, P. L.
, 2001
, “On the Thermal Elastohydrodynamic Lubrication in Opposite Sliding Circular Contacts
,” Tribol. Int.
, 34
, pp. 443
–452
.24.
Guo
, F.
, Wong
, P. L.
, Yang
, P.
, and Yagi
, K.
, 2002
, “Film Formation in EHL Point Contacts under ZEV Conditions
,” Tribol. Trans.
, 45
, pp. 521
–530
.25.
Chiu
, Y. P.
, and Sibley
, L. B.
, 1972
, “Contact Shape and Non-newtonian Effects in Elastohydrodynamic Point Contacts
,” Lubr. Eng.
, 28
, pp. 48
–60
.26.
Kaneta
, M.
, Nishikawa
, H.
, Kameishi
, K.
, Sakai
, T.
, and Ohno
, N.
, 1992
, “Effects of Elastic Moduli of Contact Surfaces in Elastohydrodynamic Lubrication
,” Trans. ASME, J. Tribol.
, 114
, pp. 75
–80
.27.
Kaneta
, M.
, Nishikawa
, H.
, Kanada
, T.
, and Matsuda
, K.
, 1996
, “Abnormal Phenomena Appearing in EHL Contacts
,” Trans. ASME, J. Tribol.
, 118
, pp. 886
–892
.28.
Kaneta, M., and Nishikawa, H., 2000, “Formation Dimples in Elliptical Contacts,” Proceedings of the 26th Leeds–Lyon Symposium on Tribology, pp. 599–607.
29.
Kawashima, R., Nishikawa, H., and Kaneta, M., 2000, “In-situ Observations of Dimple Occurrence Behaviors,” Proceedings JAST Tribology Conference, pp. 281–282 (in Japanese)
30.
Kaneta
, M.
, Kawashima
, R.
, Matsuda
, S.
, Nishikawa
, H.
, Yang
, P.
, and Wang
, J.
, 2002
, “Thermal Effects on the Film Thickness in Elliptic EHL Contacts with Entrainment Along the Major Contact Axis
,” Trans. ASME, J. Tribol.
, 124
, pp. 420
–427
.31.
Ehret
, P.
, and Bauget
, F.
, 2001
, “Observations of Kaneta’s Dimples in Elastohydrodynamic Lubrication Contacts
,” Proc. Inst. Mech. Eng., Part J: J. Eng. Tribol.
, 215
, pp. 289
–300
.32.
Guo
, F.
, and Wong
, P. L.
, 2004
, “Experimental Observation of a Dimple-Wedge Elastohydrodynamic Lubricating Film
,” Tribology International
, 37
, pp. 119
–127
.33.
Cemark
, J.
, 1998
, “Discussion
,” Trans. ASME, J. Tribol.
, 120
, pp. 142
–144
.34.
Ehret
, P.
, Dowson
, D.
, and Taylor
, C. M.
, 1998
, “On Lubricant Transport Conditions in Elastohydrodynamic Conjunctions
,” Proc. R. Soc. London, Ser. A
, 454
, pp. 763
–787
.35.
Smith
, F. W.
, 1958
, “Lubricant Behavior in Concentrated Contact Systems—The Castor Oil–steel System
,” Wear
, 2
, pp. 250
–263
.36.
Smith
, F. W.
, 1960
, “Lubricant Behavior in Concentrated Contact—Some Rheological Problems
,” ASLE Trans.
, 3
, pp. 18
–25
.37.
Smith
, F. W.
, 1962
, “The Effect of Temperature in Concentrated Contact Lubrication
,” ASLE Trans.
, 5
, pp. 142
–148
.38.
Alsaad
, M.
, Bair
, S.
, Sanborn
, D. M.
, and Winer
, W. O.
, 1978
, “Glass Transitions in Lubricants: Its Relation to EHD Lubrication
,” Trans. ASME, J. Lub. Eng.
, 100
, pp. 404
–417
.39.
Kudish, I. I., 1999, “Analysis of Abnormal Phenomena in EHL Contacts,” Proceedings of 1999 STLE/ASME H. S. Cheng Tribology Surveillance, Orlando, Florida, pp. 188–196.
40.
Qu
, S.
, Yang
, P.
, and Guo
, F.
, 2000
, “Theoretical Investigation on the Dimple Occurence in the Thermal EHL of Simple Sliding Steel–Glass Circular Contacts
,” Tribol. Int.
, 33
, pp. 59
–65
.41.
Yang
, P.
, Qu
, S.
, Kaneta
, M.
, and Nishikawa
, H.
, 2001
, “Formation of Steady Dimples in Point TEHL Contacts
,” Trans. ASME, J. Tribol.
, 123
, pp. 42
–49
.42.
Scha¨fer, C. T., Giese, P., Rowe, W. B., and Woolley, N. H., 2000, “Elastohydrodynamically Lubricated Line Contact Based on the Navier–Stokes Equations,” Proceedings of the 26th Leeds Lyon Symposium on Tribology, pp. 57–69.
43.
Zhang
, Y. B
, and Wen
, S.
, 2002
, “An Analysis of Elastohydrodynamic Lubrication with Limiting Shear Stress: Part I-Theory and Solutions
,” Tribol. Trans.
, 45
, pp. 135
–144
.44.
Zhang
, Y. B.
, and Wen
, S.
, 2002
, “An Analysis of Elastohydrodynamic Lubrication with Limiting Shear Stress: Part II-Load Influence
,” Tribol. Trans.
, 45
, pp. 211
–216
.45.
Zhang
, Y. B.
, and Wen
, S.
, 2002
, “EHL Film Thickness Limitation Theory under a Limiting Shear Stress
,” Tribol. Trans.
, 45
, pp. 531
–539
.46.
L. D., Wedeven, 1970, “Optical Measurements in Elastohydrodynamic Rolling-contact Bearings,” Ph.D. thesis, University of London.
47.
Jaeger
, J. C.
, 1942
, “Moving Sources of Heat and the Temperature at Sliding Contacts
,” J. Proc. R. Soc. N. S. W.
, 76
(1942
), pp. 203
–224
.48.
Greenwood, J. A., 2000, “Discussion on Scha¨fer’s Paper,” Proceedings of the 26th Leeds Lyon Symposium on Tribology, pp. 793–794.
49.
Johnston
, G. J.
, Wayte
, R.
, and Spikes
, H. A.
, 1991
, “The Measurement and Study of Very Thin Lubricant Films in Concentrated Contacts
,” Tribol. Trans.
, 34
, pp. 187
–194
.50.
Roelands
, C. J. A.
, Vulgter
, J. C.
, and Watermann
, H. I.
, 1963
, “The Viscosity Temperature Pressure Relationship of Lubricating Oils and its Correlation with Chemical Constitution
,” Trans. ASME, J. Bas. Eng.
, 85
, pp. 601
–610
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