The effects of thermal conductivity and kinematics of contacting surfaces and viscosity-pressure coefficient on the film thickness in an elliptical contact under pure sliding conditions in which lubricant entrainment vector is directed along the major principal axis of the contact ellipse are discussed on the basis of experimental and numerical results. In the system where the conjunction is composed of surfaces having a large difference in their thermal conductivities, the film thickness is influenced markedly by the kinematics, in particular when a lubricating oil with a rather high viscosity-pressure coefficient is used. That is, the film thickness is much smaller when the surface having a low thermal conductivity is moving and that having a high thermal conductivity is stationary than in the opposite case. It is also found that a rather large dimple occurred in former case under rather high sliding condition moves toward the exit.

Issue Section:
Technical Papers
Keywords:
thermal conductivity, lubrication, sliding friction, mechanical contact, viscosity, pressure, kinematics, films, thickness measurement
Topics:
Film thickness, Pressure, Temperature effects, Viscosity, Kinematics, Lubricants, Temperature, Rollers, Thermal conductivity, Disks
1.
Kaneta
,
M.
,
Nishikawa
,
H.
,
Kameishi
,
K.
, and
Sakai
,
T.
,
1992
, “
Effects of Elastic Moduli of Contact Surfaces in Elastohydrodynamic Lubrication
,”
ASME J. Tribol.
,
114
, pp.
75
–
80
.
2.
Kaneta
,
M.
,
Nishikawa
,
H.
,
Kanada
,
T.
, and
Matsuda
,
K.
,
1996
, “
Abnormal Phenomena Appearing in EHL Contacts
,”
ASME J. Tribol.
,
118
, pp.
886
–
892
.
3.
Kaneta, M., 1999, “For the Establishment of a New EHL Theory,” Proc. 25th Leeds-Lyon Symposium on Tribology, pp. 25–36.
4.
Kaneta, M., and Nishikawa, H., 2000, “Formation of Dimples in Elliptical EHL Contacts,” Proc. 26th Leeds-Lyon Symposium on Tribology, pp. 599–607.
5.
Ehret
,
P.
,
Dowson
,
D.
, and
Taylor
,
C. M.
,
1998
, “
On the Lubricant Transport Conditions in Elastohydrodynamic Conjunctions
,”
Proc. R. Soc. London, Ser. A
,
454
, pp.
763
–
787
.
6.
Schaefer, C. T., Giese, P., Rowe, W. B., and Woolley, N. H., 1999, “Elastohydrodynamically Lubricated Line Contact based on the Navier-Stokes Equations,” Proc. 26th Leeds-Lyon Symposium on Tribology, pp. 57–69.
7.
Kudish
,
I. I.
,
2000
, “
Formulation and Analysis of EHL Problems for Soft Materials
,”
ASME J. Tribol.
,
122
, pp.
705
–
710
.
8.
Qu
,
S.
,
Yang
,
P.
, and
Guo
,
F.
,
2000
, “
Theoretical Investigation on the Dimple Occurrence in the Thermal EHL of Simple Sliding Steel-Glass Circular Contacts
,”
Tribol. Int.
,
33
, pp.
59
–
65
.
9.
Cameron
,
A.
,
1951
, “
Hydrodynamic Lubrication of Rotating Disks in Pure Sliding, A New Type of Oil Film Formation
,”
J. Inst. Pet.
,
37
, pp.
471
–
485
.
10.
Cameron
,
A.
,
1958
, “
The Viscosity Wedge
,”
ASLE Trans.
1
, pp.
248
–
253
.
11.
Yang
,
P.
,
Qu
,
S.
,
Kaneta
,
M.
, and
Nishikawa
,
H.
,
2001
, “
Formation of Steady Dimples in Point TEHL Contacts
,”
ASME J. Tribol.
,
123
, pp.
42
–
49
.
12.
Foord
,
C. A.
,
Wedeven
,
L. D.
,
Westlake
,
F. J.
, and
Cameron
,
A.
,
1969/1970
, “
Optical Elastohydrodynamics
,”
Proc. Inst. Mech. Eng.
,
184
, Part 1, No.
28
, pp.
487
–
505
.
13.
Ohno, N., and Hirano, F., 2000, “High Pressure Rheology Analysis of Traction Oils Based on Free Volume Measurements,” 55th STLE Annual Meeting, Paper No. 00-NP-11.
14.
Roelands, C. J. A., 1966, “Correlation Aspects of Viscosity-Temperature-Pressure Relationship of Lubricating Oils,” Ph.D. thesis, Delft University of Technology, Netherlands.
15.
Zhu
,
D.
, and
Wen
,
S.
,
1984
, “
A Full Numerical Solution for the Thermo-Elastohydrodynamic Problem in Elliptical Contact
,”
ASME J. Tribol.
,
106
, pp.
246
–
254
.
16.
Venner, C. H., 1991, “Multilevel Solution of the EHL Line and Point Contact Problems,” Ph.D. thesis, University of Twente, Enschede, Netherlands.
17.
Brandt
,
A.
, and
Lubrecht
,
A. A.
,
1990
, “
Multilevel Matrix Multiplication andFast Solution of Integral Equations
,”
J. Comput. Phys.
,
90
, pp.
348
–
370
.
18.
Chittenden
,
R. J.
,
Dowson
,
D.
,
Dunn
,
J. F.
, and
Taylor
,
C. M.
,
1985
, “
A Theoretical Analysis of the Isothermal Elastohydrodynamic Lubrication of Concentrated Contacts
,”
Proc. R. Soc. London, Ser. A
,
397
, pp.
245
–
294
.
19.
Sadeghi
,
F.
, and
Sui
,
P. C.
,
1990
, “
Thermal Elastohydrodynamic Lubrication of Rolling/Sliding Contacts
,”
ASME J. Tribol.
,
112
, pp.
189
–
195
.
20.
Yang
,
P.
, and
Wen
,
S.
,
1990
, “
A Generalized Reynolds Equation for Non-Newtonian Thermal Elastohydrodynamic Lubrication
,”
ASME J. Tribol.
,
112
, pp.
631
–
636
.
21.
Ma
,
M-T.
,
1998
, “
Effects of the Non-Newtonian Behavior of Lubricants on the Temperature, Traction, and Film Thickness in an Elliptical EHD Contact Under Heavy Loads
,”
ASME J. Tribol.
,
120
, pp.
685
–
694
.
Copyright © 2002
 by ASME
You do not currently have access to this content.