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TECHNICAL PAPERS

Scale Effect in Dry Friction During Multiple-Asperity Contact

[+] Author and Article Information
Michael Nosonovsky, Bharat Bhushan

Nanotribology Laboratory for Information Storage and MEMS/NEMS, Department of Mechanical Engineering, 206 W 18th Avenue, Ohio State University, Columbus, OH 43210-1107

J. Tribol 127(1), 37-46 (Feb 07, 2005) (10 pages) doi:10.1115/1.1829722 History: Received March 03, 2004; Revised June 03, 2004; Online February 07, 2005
Copyright © 2005 by ASME
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References

Figures

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Roughness parameters as a function of scan size for a glass-ceramic disk measured using AFM 2
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Scale length dependence of normalized contact parameters (m=0.5,n=0.2) (a) real area of contact (b) number of contacts, and (c) mean contact radius
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Dependence of the normalized long wavelength limit for contact parameters on load (normalized apparent pressure) for elastic and plastic contacts (m=0.5,n=0.2)
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Normalized results for the adhesional component of the coefficient of friction, as a function of scale for scale independent (Ls=0) and scale dependent (Ls=10Llc) shear strength (m=0.5,n=0.2) (a) Elastic contact (b) Plastic contact (Ld=10Ls=10Llc)
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Normalized results for the deformation component of the coefficient of dry friction (m=0.5,n=0.2)
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Normalized results for the ratchet component of the coefficient of friction, as a function of scale, for scale independent (Ls=0) and scale dependent (Ls=10Llc) shear strength (m=0.5,n=0.2), (a) elastic contact and (b) plastic contact (Ld=10Llc)
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The number of trapped particles divided by the total number of particles and three-body deformation component of the coefficient of dry friction, normalized by the macroscale value, for normal and log-normal distributions of debris size
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The transition index as a function of scale (m=0.5,n=0.2 and m=0.5,n=0.4), for scale independent (Ls=0) and scale dependent (Ls=10Llc) shear strength
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Coefficient of friction as a function of normal load 4

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