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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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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