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TECHNICAL PAPERS

On Heat Generation in Rolling Contacts Under Boundary and Mixed Lubrication

[+] Author and Article Information
L. Chang, Yongwu Zhao

Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802

P. B. Hall, R. Thom, C. Moore

Nondestructive Evaluation and Tribology Branch, NASA Marshall Space Flight Center, MSFC, AL 35812

J. Tribol 123(1), 61-66 (Aug 17, 2000) (6 pages) doi:10.1115/1.1330733 History: Received January 21, 2000; Revised August 17, 2000
Copyright © 2001 by ASME
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References

Tevaarwerk, J. L., 1992, “Development of a Cryogenic Traction Tester,” NASA Contract No. NAS8-38552, Huntsville, AL.
Hall,  P. B., Thom,  R., and Chang,  L., 1997, “An Experimental/Analytical Study of High-Speed and High-Load Rolling/Sliding Contacts with Low-Viscosity Fluids,” Tribol. Trans., 40, No. 1, pp. 41–48.
Chang,  L., Hall,  P. B., and Thom,  R., 1998, “Scuffing Characteristics of High-Load Rolling/Sliding Contacts Operating in Liquid Oxygen—Effects of Materials and Surface Roughness,” Tribol. Trans., 41, No. 1, pp. 87–95.
Chang,  L., and Gao,  Y., 1999, “A Simple Numerical Method for Contact Analysis of Rough Surfaces,” ASME J. Tribol., 121, No. 3, pp. 425–432.
Zhai,  X., and Chang,  L., 2000, “A Transient Thermal Model for Mixed-Film Contacts,” Tribol. Trans., 43, No. 3, pp. 427–434.
Lee,  S. C., and Cheng,  H. S., 1992, “On the Relation of Load to Average Gap in the Contact Between Surface with Longitudinal Roughness,” Tribol. Trans., 35, No. 3, pp. 523–529.
Tian,  X., and Bhushan,  B., 1996, “A Numerical Three-Dimensional Model for Rough Surface Contact,” ASME J. Tribol., 118, No. 1, pp. 33–42.
Halling, J., 1978, Principles of Tribology, Macmillan, London.
Johnson,  K. L., and Tevaarwerk,  J. L., 1977, “Shear Behavior of Elastohydrodynamic Oil Films,” Proc. R. Soc. London, Ser. A, 356, pp. 215–236.
Wang,  S., Cusano,  C., and Conry,  T. F., 1991, “Thermal Analysis of Elastohydrodynamic Lubrication of Line Contact Using the Ree-Eyring Model,” ASME J. Tribol., 103, No. 2, pp. 232–244.
Chang,  L., and Zhao,  Y., 2000, “On the Sensitivity of the Asperity Pressures and Temperatures to the Fluid Pressure Distribution in Mixed-Film Lubrication,” ASME J. Tribol., 122, No. 1, pp. 77–85.

Figures

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Schematic of the traction tester
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Surface measurements of tested toroid samples: (a) pure rolling; (b) ξ=0.001; (c) ξ=0.002; and (d) ξ=0.004
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Schematic of two contacting rough surfaces
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A segment of the composite roughness in the model problem
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A time-snapshot of the model contact problem: (a) pressure and (b) temperature
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Histogram of the calculated asperity temperatures
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Calculated temperature distribution including APD heating
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Histogram of the asperity temperatures including APD heating
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Asperity temperatures in the mixed-lubrication contact: (a) APD heating not included; (b) APD heating included (ph=2.5 GPa,u=30.0 m/s,ξ=0.03,wf=90 percent,H=50 RC, and σ=0.15 μm)
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Slide-to-roll ratios to give equal asperity temperatures due to APD heating and frictional heating: (a) equal average asperity temperature, (b) equal maximum asperity temperature

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