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TECHNICAL PAPERS

Debris Effects on EHL Contact

[+] Author and Article Information
Young S. Kang, Farshid Sadeghi

School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-1288

Xiaolan Ai

The Timken Company, Canton, OH 44706

J. Tribol 122(4), 711-720 (Jun 16, 2000) (10 pages) doi:10.1115/1.1314606 History: Received April 12, 1999; Revised June 16, 2000
Copyright © 2000 by ASME
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References

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Cusano,  C., and Sliney,  H. E., 1982, “Dynamic of Solid Dispersions in Oil During the Lubrication of Point Contacts: Part II—Molybdenum Disulfide,” ASLE Trans., 25, pp. 190–197.
Wan,  G. T. Y., and Spikes,  H. A., 1988, “The Behavior of Suspended Solid Particles in Rolling and Sliding Elastohydrodynamic Contacts,” STLE Tribol. Trans., 31, No. 1, pp. 12–21.
Hamer, J. C., Sayles, R. S., and Ioannides, E., 1987, “Deformation Mechanisms and Stresses Created by Third Body Debris Contacts and Their Effects on Rolling Bearing Fatigue,” Interface Dynamics, Proceedings of the 14th Leeds-Lyon Symposium on Tribology, Lyon, London, United Kingdom, Tribology Series 12, Elsevier, New York, pp. 201–208.
Hamer,  J. C., Sayles,  R. S., and Ioannides,  E., 1989, “Particle Deformation and Counterface Damage When Relatively Soft Particles are Squashed Between Hard Anvils,” STLE Tribol. Trans., 32, No. 3, pp. 281–288.
Nixon, H. P., and Cogdell, J. D., 1998, “Debris Signature Analysis: A Method for Assessing the Detrimental Effect of Specific Debris contained Lubrication Environments,” SAE Paper 981478.
Dwyer-Joyce, R. S., Hamer, J. C., Sayles, R. S., and Ioannides, E., 1990, “Surface Damage Effects Caused by Debris in Rolling Bearing Lubricants, With an Emphasis on Friable Materials,” in Rolling Element Bearings-Towards the 21st Century, Mechanical Engineering Publications for the I. Mech. E., Professional Engineering Publishing, United Kingdom, pp. 17–24.
Ville, F., and Nélias, D., 1998, “Influence of the Nature and Size of Solid Particles on the Indentation Features in EHL Contacts,” Proceedings of the 24th Leeds-Lyon Symposium on Tribology, London, United Kingdom, Dowson et al., eds, Tribology Series, 34 , Elsevier, New York, pp. 399–410.
Ai,  X., and Cheng,  H. S., 1994, “Influence of Moving Dent on Point EHL Contacts,” STLE Tribol. Trans., 37, No. 2, pp. 323–335.
Ai,  X., and Lee,  S. C., 1996, “Effect of Slide-to-Roll Ratio on Interior Stresses Around a Dent in EHL Contacts,” STLE Tribol. Trans., 39, No. 4, pp. 881–889.
Xu,  G., and Sadeghi,  F., 1996, “Spall Initiation and Propagation due to Debris Denting,” Wear, 201, pp. 106–116.
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Xu,  G., Sadeghi,  F., and Cogdell,  J. D., 1997, “Debris Denting Effects on Elastohydrodynamic Lubricated Contacts,” ASME J. Tribol., 119, pp. 579–587.
Xu,  G., Sadeghi,  F., and Hoeprich,  M. R., 1997, “Residual Stresses Due to Debris Effects in EHL contacts,” STLE Tribol. Trans., 40, No. 4, pp. 613–620.
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Figures

Grahic Jump Location
Schematic of lubricated contact with a debris
Grahic Jump Location
Schematic of pressure (forces) applied to a debris
Grahic Jump Location
Debris shape (ellipsoidal debris)
Grahic Jump Location
(a) Pressure profile; (b) film thickness profile; (c) contour plot of film thickness; (d) film thickness profile along the center line of contact (W*=2.0e−6,U*=1.0e−10,G=3500,S=0.0,Xo=−2.5 for an ellipsoidal shaped debris)
Grahic Jump Location
(a) Pressure profile; (b) film thickness profile; (c) contour plot of film thickness; (d) film thickness profile along the center line of the contact (W*=2.0e−6,U*=1.0e−10,G=3500,S=0.0,Xo=−1.3 for an ellipsoidal shaped debris)
Grahic Jump Location
(a) Pressure profile; (b) film thickness profile; (c) contour plot of film thickness; (d) film thickness profile along the center line of the contact (W*=2.0e−6,U*=1.0e−10,G=3500,S=0.0,Xo=−1.3 for an ellipsoidal shaped debris)
Grahic Jump Location
(a) Pressure profile; (b) film thickness profile; (c) contour plot of film thickness; (d) film thickness profile along the center line of the contact (W*=2.0e−6,U*=1.0e−10,G=3500,S=0.0,Xo=0.0 for an ellipsoidal shaped debris)
Grahic Jump Location
Velocity profile (W*=1.9×10−5,U*=5.3×10−11,G=3500,S=0.0,hd=20×10−6 m)
Grahic Jump Location
Pressure profile (W*=1.9×10−5,U*=5.3×10−11,G=3500)
Grahic Jump Location
Net force applied to the debris
Grahic Jump Location
Debris size which can enter an EHL contact

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