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TECHNICAL PAPERS

Solid Third Body Analysis Using a Discrete Approach: Influence of Adhesion and Particle Size on Macroscopic Properties

[+] Author and Article Information
I. Iordanoff, B. Seve, Y. Berthier

Laboratoire de Mécanique des Contacts UMR, INSA-CNRS 5514, 20 Avenue Albert Einstein, 69621 Villeurbanne Cedex, France

J. Tribol 124(3), 530-538 (May 31, 2002) (9 pages) doi:10.1115/1.1456089 History: Received March 07, 2001; Revised September 10, 2001; Online May 31, 2002
Copyright © 2002 by ASME
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References

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Berthier,  Y., Godet,  M., and Brendle,  M., 1989, “Velocity Accommodation in Friction,” Tribol. Trans., 32, pp. 490–496.
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Figures

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Visualization of the shear accommodation
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Contact between two particles
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Domain simulated, function of the mean diameter, for given thickness and length of the domain
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Domain with a high coordination number and a low solid fraction
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Stabilization of mean coefficient of friction and mean kinetic energy with the time of averaging: Hertz simulation, dt=5.10−10 s,L=1 mm, φ=20 μm: (a) mean coefficient of friction; and (b) mean kinetic energy.
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Effect of the domain length of macroscopic properties: Hertz simulation, dt=5.1010 s, φ=20 μm: (a) effect of period length on solid fraction; and (b) effect of period length on mean kinetic energy.
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Comparison of macroscopic properties for the Hertz simulation, and for three mean particle diameters: 5 μm (D5), 10 μm (D10), 20 μm (D20), dt=5.10−10 s,L=1: (a) coefficient of friction; (b) kinetic energy; (c) surfacic flow; and (d) solid fraction.
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Snapshot extracted from the hertz simulation for the three mean diameters
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Snapshot extracted from the JKR simulation for the three mean diameters
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Comparison of macroscopic properties for the JKR simulation, for a constant value of the surface energy γ, and for three mean particle diameters: 5 μm (D5), 10 μm (D10), 20 μm (D20), dt=5.10−10 s,L=1: (a) coefficient of friction; (b) surfacic flow; (c) solid fraction; (d) coordination number; and (e) adherence coefficient.
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Critical load necessary to break a contact with the JKR theory
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Comparison of macroscopic properties for the JKR simulation, for a constant value of the critical force Fc, and for three mean particle diameters: 5 μm (D5), 10 μm (D10), 20 μm (D20), dt=5.10−10 s,L=1: (a) coefficient of friction; (b) adherence flow; (c) surfacic flow; (d) solid fraction.

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