Transient thermal elastohydrodynamic lubrication (EHL) line contact simulations are carried out to study the traction behavior during accelerated motion considering realistic shear-thinning behavior. Using three lubricants with different inlet viscosity and shear-thinning parameters, the application of present analysis for lubricant selection is demonstrated. Owing to squeeze film action, the film evolution is delayed, and EHL traction during acceleration is found to increase much above the designed value. This effect decreases with increasing starting speed. The most shear-thinning test oil considered here yields the lowest traction coefficient with minimum variation in its value desirable for smooth and vibration-free operation.
References
References
1.
Lee
, R. T.
Hamrock
, B. J.
1989
, “Squeeze and Entraining Motion in Nonconformal Line Contacts—Part II: Elastohydrodynamic Lubrication
,” ASME J. Tribol.
, 111
(1
), pp. 8
–16
.2.
Yang
, P.
Wen
, S.
1991
, “Pure Squeeze Action in an Isothermal Elastohydrodynamically Lubricated Spherical Conjunction
,” Wear
, 142
(1
), pp. 1
–16
.3.
Dowson
, D.
Wang
, D.
1995
, “Impact Elastohydrodynamics
,” 21st Leeds-Lyon Symposium on Tribology
, D.
Dowson
C. M.
Taylor
T.
Childs
G.
Dalmaz
565
–582
.4.
Glovnea
, R. P.
Spikes
, H. A.
2000
, “The Influence of Lubricant Upon EHD Film Behavior During Sudden Halting of Motion
,” STLE Tribol. Trans.
, 43
(4
), pp. 731
–739
.5.
Zhao
, J.
Sadeghi
, F.
2003
, “Analysis of EHL Circular Contact Shut Down
,” ASME J. Tribol.
, 125
(1
), pp. 76
–89
.6.
Sakamoto
, M.
Nishikawa
, H.
Kaneta
, M.
2004
, “Behaviour of Point Contact EHL Films Under Pulsating Loads
,” 30th Leeds Lyon Symposium on Tribology
, A.
Lubrecht
G.
Dalmaz
391
–399
.7.
Guo
, F.
Nishikawa
, H.
Yang
, P.
Kaneta
, M.
2007
, “EHL Under Cyclic Squeeze Motion
,” Tribol. Int.
, 40
(1
), pp. 1
–9
.8.
Nishikawa
, H.
Miyazaki
, H.
Kaneta
, M.
Guo
, F.
2008
, “Effects of Two-Stage Impact Load on Point Contact Elastohydrodynamic Lubrication Films
,” Proc. Inst. Mech. Eng., Part J
, 222
(7
), pp. 807
–814
.9.
Kumar
, P.
Khonsari
, M. M.
Bair
, S.
2010
, “Anharmonic Variations in Elastohydrodynamic Film Thickness Resulting From Harmonically Varying Entrainment Velocity
,” Proc. Inst. Mech. Eng., Part J
, 224
(3
), pp. 239
–247
.10.
Anuradha
, P.
Kumar
, P.
2012
, “Effect of Lubricant Selection on EHL Performance of Involute Spur Gears
,” Tribol. Int.
, 50
, pp. 82
–90
.11.
Sperka
, P.
Wang
, J.
Krupka
, I.
Hartl
, M.
Kaneta
, M.
2014
, “Occurrence of High Pressure Spike in Unidirectional Start-Stop-Start Point Contacts
,” ASME J. Tribol.
, 136
(4
), p. 041503
.12.
Kumar
, P.
Khonsari
, M. M.
2009
, “On the Role of Lubricant Rheology and Piezo-Viscous Properties in Line and Point Contact EHL
,” Tribol. Int.
, 42
(11–12
), pp. 1522
–1530
.13.
Johnson
, K. L.
Greenwood
, J. A.
1980
, “Thermal Analysis of an Eyring Fluid in EHD Traction
,” Wear
, 61
(2
), pp. 353
–374
.14.
Houpert
, L. G.
Hamrock
, B. J.
1985
, “Elastohydrodynamic Lubrication Calculations Used as a Tool to Study Scuffling
,” 12th Leeds-Lyon Symposium on Tribology
, Lyon, France, Sept. 3–6, Tribology Series, Elsevier, Amsterdam, The Netherlands, pp. 146
–155
.15.
Conry
, T. F.
Wang
, S.
Cusano
, C.
1987
, “A Reynolds-Eyring Equation for Elastohydrodynamic Lubrication in Line Contacts
,” ASME J. Tribol.
, 109
(4
), pp. 648
–654
.16.
Chang
, L.
Cusano
, C.
Conry
, T. F.
1988
, “Effects of Lubricant Rheology and Kinematic Conditions Micro-Elastohydrodynamic Lubrication
,” ASME J. Tribol.
, 111
(2
), pp. 344
–351
.17.
Bair
, S.
Qureshi
, F.
2003
, “The Generalized Newtonian Fluid Model and Elastohydrodynamic Film Thickness
,” ASME J. Tribol.
, 125
(1
), pp. 70
–75
.18.
Bair
, S.
2007
, High Pressure Rheology for Quantitative Elastohydrodynamics (Tribology and Interface Engineering Series, Vol. 54)
, Elsevier Press
, Amsterdam, The Netherlands
.19.
Chapkov
, A. D.
Bair
, S.
Cann
, P.
Lubrecht
, A. A.
2007
, “Film Thickness in Point Contacts Under Generalized Newtonian EHL Conditions: Numerical and Experimental Analysis
,” Tribol. Int.
, 40
(10–12
), pp. 1474
–1478
.20.
Jang
, J. Y.
Khonsari
, M. M.
Bair
, S.
2007
, “On the Elastohydrodynamic Analysis of Shear-Thinning Fluids
,” Proc. R. Soc. London
, 463
(2088
), pp. 3271
–3290
.21.
Liu
, Y.
Wang
, Q. J.
Bair
, S.
Vergne
, P.
2007
, “A Quantitative Solution for the Full Shear-Thinning EHL Point Contact Problem Including Traction
,” Tribol. Lett.
, 28
(2
), pp. 171
–181
.22.
Krupka
, I.
Kumar
, P.
Bair
, S.
Khonsari
, M. M.
Hartl
, M.
2010
, “The Effect of Load (Pressure) for Quantitative EHL Film Thickness
,” Tribol. Lett.
, 37
(3
), pp. 613
–622
.23.
Sui
, P. C.
Sadeghi
, F.
1991
, “Non-Newtonian Thermal Elastohydrodynamic Lubrication
,” ASME J. Tribol.
, 113
(2
), pp. 390
–396
.24.
Salehizadeh
, H.
Saka
, N.
1991
, “Thermal Non-Newtonian Elastohydrodynamic Lubrication of Rolling Line Contacts
,” ASME J. Tribol.
, 113
(3
), pp. 481
–491
.25.
Wang
, S.
Conry
, T. F.
Cusano
, C.
1992
, “Thermal Non-Newtonian Elastohydrodynamic Lubrication of Line Contacts Under Simple Sliding Conditions
,” ASME J. Tribol.
, 114
(2
), pp. 317
–327
.26.
Hsiao
, H. S.
Hamrock
, B. J.
1992
, “A Complete Solution for Thermal-Elastohydrodynamic Lubrication of Line Contacts Using Circular Non-Newtonian Fluid Model
,” ASME J. Tribol.
, 114
(3
), pp. 540
–551
.27.
Kumar
, P.
Khonsari
, M. M.
2008
, “Combined Effects of Shear Thinning and Viscous Heating on EHL Characteristics of Rolling/Sliding Line Contact
,” ASME J. Tribol.
, 130
(4
), p. 041505
.Copyright © 2017 by ASME
You do not currently have access to this content.
