Scaling theory of rubber sliding friction

Abstract Current theoretical descriptions of rubber or elastomer friction are complex—usually due to extensive mathematical detail describing the topography of the solid surface. In addition, the viscoelastic properties of the elastomer material itself, in particular if the rubber is highly filled,...

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Main Authors:	Reinhard Hentschke, Jan Plagge
Format:	article
Language:	EN
Published:	Nature Portfolio 2021
Subjects:	Medicine R Science Q
Online Access:	https://doaj.org/article/cee41c67fcd241e9a2b7f4265cd45bf8
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spelling	oai:doaj.org-article:cee41c67fcd241e9a2b7f4265cd45bf82021-12-02T18:33:46ZScaling theory of rubber sliding friction10.1038/s41598-021-97921-02045-2322https://doaj.org/article/cee41c67fcd241e9a2b7f4265cd45bf82021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97921-0https://doaj.org/toc/2045-2322Abstract Current theoretical descriptions of rubber or elastomer friction are complex—usually due to extensive mathematical detail describing the topography of the solid surface. In addition, the viscoelastic properties of the elastomer material itself, in particular if the rubber is highly filled, further increase the complexity. On the other hand, experimental coefficients of sliding friction plotted versus sliding speed, temperature or other parameters do not contain much structure, which suggests that a less detailed approach is possible. Here we investigate the coefficient of sliding friction on dry surfaces via scaling and dimensional analysis. We propose that adhesion promotes viscoelastic dissipation by increasing the deformation amplitude at relevant length scales. Finally, a comparatively simple expression for the coefficient of friction is obtained, which allows an intuitive understanding of the underlying physics and fits experimental data for various speeds, temperatures, and pressures.Reinhard HentschkeJan PlaggeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Reinhard Hentschke Jan Plagge Scaling theory of rubber sliding friction
description	Abstract Current theoretical descriptions of rubber or elastomer friction are complex—usually due to extensive mathematical detail describing the topography of the solid surface. In addition, the viscoelastic properties of the elastomer material itself, in particular if the rubber is highly filled, further increase the complexity. On the other hand, experimental coefficients of sliding friction plotted versus sliding speed, temperature or other parameters do not contain much structure, which suggests that a less detailed approach is possible. Here we investigate the coefficient of sliding friction on dry surfaces via scaling and dimensional analysis. We propose that adhesion promotes viscoelastic dissipation by increasing the deformation amplitude at relevant length scales. Finally, a comparatively simple expression for the coefficient of friction is obtained, which allows an intuitive understanding of the underlying physics and fits experimental data for various speeds, temperatures, and pressures.
format	article
author	Reinhard Hentschke Jan Plagge
author_facet	Reinhard Hentschke Jan Plagge
author_sort	Reinhard Hentschke
title	Scaling theory of rubber sliding friction
title_short	Scaling theory of rubber sliding friction
title_full	Scaling theory of rubber sliding friction
title_fullStr	Scaling theory of rubber sliding friction
title_full_unstemmed	Scaling theory of rubber sliding friction
title_sort	scaling theory of rubber sliding friction
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/cee41c67fcd241e9a2b7f4265cd45bf8
work_keys_str_mv	AT reinhardhentschke scalingtheoryofrubberslidingfriction AT janplagge scalingtheoryofrubberslidingfriction
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Scaling theory of rubber sliding friction

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