Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division August 12, 2003; revised manuscript received April 14, 2004. Review conducted by: M. R. Lovell.

Liquid lubricants in elastohydrodynamic lubrication (EHL) are subjected to high pressures of the magnitude of 109N/m2GPa. Under these high pressures, the lubricants in room temperatures are usually in the glassy state behaving as amorphous solids. Similar to the polymers, the lubricants exhibit elastic or visco-elastic behavior under low-shear-stress loading and plastic or visco-plastic behavior with high-shear stresses. Recent laboratory experiments have revealed two types of localized shear responses that can take place in the lubricant bulk. The localized shear may be active in the EHL film and may play a significant role in the responses exhibited by the contact conjunction. A typical example...

1.
Bair
,
S.
,
Qureshi
,
F.
, and
Winer
,
W. O.
,
1993
, “
Observations of Shear Localization in Liquid Lubricants Under Pressure
,”
ASME J. Tribol.
,
115
(
3
), pp.
507
514
.
2.
Bowden, P. B., 1973, in The Physics of Glassy Polymers, R. N. Haward, ed., Wiley, New York, pp. 279–339.
3.
Bair, S., and Winer, W., 2000, “A Study of Mechanical Shear Bands in Liquids at High Pressure,” XIII International Congress on Rheology, pp. 3-191–3-193.
4.
Bair
,
S.
,
Qureshi
,
F.
, and
Khonsari
,
M.
,
1994
, “
Adiabatic Shear Localization in a Liquid Lubricant Under Pressure
,”
ASME J. Tribol.
,
116
(
4
), pp.
705
708
.
5.
Bai, and Dodd, 1992, Adiabatic Shear Localization, Pergamon Press, Oxford.
6.
Bair
,
S.
, and
Winer
,
W.
,
1979
, “
Shear Strength Measurements of Lubricants at High Pressure
,”
ASME J. Tribol.
,
101
(
3
), pp.
251
257
.
7.
Bair, S., Winer, W., and Distin, K., 1993, “Experimental Investigations Into Shear Localization in an Operating EHD Contact,” Proc. Leeds-Lyon Symposium, Thin Films in Tribology, D. Dowson et al., eds., Elsevier Sicence Publishers B. V., pp. 383–388.
8.
Plint
,
M. A.
,
1967
, “
Traction in Elastohydrodynamic Contacts
,”
Proc. Instn. Mech. Engrs
,
182
(1,14), pp.
300
306
.
9.
Willermet, P. A., McWatt, D. G., and Wedeven, L. D., 1999, “Traction Behavior Under Extreme Conditions,” SAE International Fall Fuels and Lubricants Meeting and Exposition, Toronto, Ontario, Canada, Oct. 25–28, SAE paper 1999-01-3612.
10.
Webster, M. N., Lee, G. H., and Chang, L., 2003, “Effect of EHL Conditions on the Behavior of Traction Fluids,” Tribol. Trans. (submitted).
11.
Chang, L., Qu, S., Webster, M. N., and Jackson, A., 2003, “On the Mechanisms of the Dramatic Reduction in the EHL Traction Under Low Temperature Conditions,” Tribol. Trans. (submitted).
12.
Kaneta
,
M.
,
Nishikawa
,
H.
,
Kameishi
,
K.
,
Sakai
,
T.
, and
Ohno
,
N.
,
1992
, “
Effects of Elastic Moduli of Contact Surfaces in Elastohydrodynamic Lubrication
,”
ASME J. Tribol.
,
114
(
1
), pp.
75
80
.
13.
Yang
,
P.
,
Qu
,
S.
,
Kaneta
,
M.
, and
Kaneta
,
M.
,
2001
, “
Formation of Steady Dimples in Point TEHL Contacts
,”
ASME J. Tribol.
,
123
(
1
), pp.
42
49
.
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