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Comparison of hysteric and adhesive coefficient of friction for rubbers sliding onto self-affine rough surfaces

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1 Author(s)
Palasantzas, George ; Department of Applied Physics, Materials Science Center, University of Groningen Nijenborgh 4, 9747 AG Groningen, The Netherlands

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.1844617 

In this paper we investigate the influence of both the hysteric and adhesive friction for rubber surfaces sliding on self-affine rough surfaces. This type of roughness is described by the roughness amplitude w, the in-plane correlation length ξ, and the roughness exponent H that characterizes the degree of surface irregularity at short length scales (≪ξ). It is shown that beyond the typical roughness parameters w and ξ, which are usually used in describing rough surfaces, the influence of the roughness exponent H should be taken carefully into account in order to properly gauge the contributing frictional mechanisms. Indeed, it is shown that for large roughness exponents (H∼1) and/or small roughness ratios w/ξ≪10-2, the adhesive friction becomes significant at relatively high sliding velocities beyond the maximum of the hysteric component.

Published in:

Journal of Applied Physics  (Volume:97 ,  Issue: 3 )

Date of Publication:

Feb 2005

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