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Cited by 266

The DOI matches its Crossref record; 14 of the 14 references it cites were found in a registry or an index.

Physical analysis of the state- and rate-dependent friction law. II. Dynamic friction

Baumberger, T., Berthoud, P., Caroli, C.·1999·Physical Review B

Abstract

We report an extensive study of dynamic friction at nonlubricated multicontact interfaces between nominally flat bodies, rough on the micrometer scale, made of identical polymer glasses. This work, which complements a previous study of static friction on the same systems, has been performed at temperatures ranging from $20\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}$ to close below the glass transitions. The data are analyzed within the framework of the Rice-Ruina state- and rate-dependent friction model. We show that this phenomenology is equivalent to a generalized Tabor decomposition of the friction force into the product of an age-dependent load-bearing area and of a velocity-strengthening interfacial shear stress. Quantitative analysis of this latter term leads to associate velocity strengthening with thermal activation of basic dynamical units of nanometer dimensions. We interpret our results with the help of a model due to Persson, in which shear is localized in a nanometer-thick interfacial adhesive layer, pinned elastically at a low shear level. Sliding proceeds via uncorrelated depinning of ``nanoblocks'' which constitute the layer. It is the competition between the drive-induced loading of these blocks up to their depinning stress and the thermally activated premature depinning events which leads to the velocity-strengthening contribution to the interfacial strength. In our interpretation, friction therefore appears as the localized elastoplastic response of a confined amorphous interfacial layer.

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Metadata

Authors
Baumberger, T., Berthoud, P., & Caroli, C.
Venue
Physical Review B
Published
1999-08-01
Volume
60
Issue
6
Pages
3928-3939
ISSN
  • 0163-1829 (ISSN-L)
  • 1095-3795
OpenAlex
W4231971603
Cited by
266
References
14
FWCI
10.82
Type
journal article
Language
en
Open access
closed

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