A discussion on present theories of rubber friction, with particular reference to different possible choices of arbitrary roughness cutoff parameters

Since the early study by Grosch in 1963 it has been known that rubber friction shows generally two maxima with respect to speed - the first one attributed to adhesion, and another at higher velocities attributed to viscoelastic losses. The theory of Klüppel and Heinrich and that of Persson suggests that viscoelastic losses crucially depend on the “multiscale” aspect of roughness and in particular on truncation at fine scales. In this study, we comment a little on both theories, giving some examples using Persson’s theory on the uncertainties involved in the truncation of the roughness spectrum. It is shown how different choices of Persson’s model parameters, for example the high-frequency cutoff, equally fit experimental data on viscoelastic friction, hence it is unclear how to rigorously separate the adhesive and the viscoelastic contributions from experiments.

Subjects

rubber friction

viscoelasticity

roughness

DDC Class

600: Technik

620: Ingenieurwissenschaften

Funding(s)

Azione I.2-D.D. n. 407 del 27/02/2018

Untersuchung und Anwendung komplexer, nichtlinearer, dynamischer Zustände in reiberregten mechanischen Systemen

More Funding Information

Deutsche Forschungsgemenschaft (DFG)

Italian Ministry of Education, University and Research (MIUR) under theDepartments of Excellence

PON Ricerca e Innovazione 2014/2020

Lizenz

https://creativecommons.org/licenses/by/4.0/

Name

lubricants-07-00085.pdf

Size

2.61 MB

Format

Adobe PDF

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A discussion on present theories of rubber friction, with particular reference to different possible choices of arbitrary roughness cutoff parameters