Experimental Characterization of Sliding Friction: Crossing From Deformation to Plowing Contact

[+] Author and Article Information
M. R. Lovell, Zhi Deng

Center for Robotics and Manufacturing Systems, University of Kentucky, Lexington, KY 40506-0108

M. M. Khonsari

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803

J. Tribol 122(4), 856-863 (Jan 06, 2000) (8 pages) doi:10.1115/1.1286217 History: Received July 07, 1999; Revised January 06, 2000
Copyright © 2000 by ASME
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Mechanism of the interaction between a harder tool and a softer deformable metal: (a) the interaction of contact surfaces; (b) The transfer model of wear particle formation
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The apparatus photograph and operating principle of the pin-on-disk tribometer: (a) FALEX ISC-200PC type pin-on-disk tribometer; (b) The operating principle of the pin-on-disk tribometer
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Typical friction coefficient versus sliding distance curves
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The wear track of pin on the disk
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The variation of the friction coefficient with the shear factor, lubricant and indentor shape (v=500 mm/s,(Ra)disk=0.69 μm): (a) ball-shaped pin (d0=3.18 mm); (b) ball-shaped pin (d0=6.35 mm); and (c) ball-shaped pin (d0=12.70 mm). (From Komvopoulos et al. 19.)
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Optical micrographs of the disk surface acted by (a) low and (b) high normal loads (Oil A,v=500 mm/s,d0=6.35 mm): (a) disk surface without waves or grooves (P=1.22 N); (b) Disk surface with waves (P=4.41 N)
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The variation of the friction coefficient with the sliding speed and the apparent contact pressure at different lubricants for the ball-shaped pin (d0=3.18 mm): (a) oil A; (b) oil B; and (c) grease
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The geometry of a cone-shaped pin and its contact situation with the disk: (a) pin geometry; and (b) pin head penetrating into the disk under the normal load of 0.98 N
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The variation of the friction coefficient with the shear factor and indentor shape for Oil B (v=500 mm/s,(Ra)disk=0.69 μm)




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