Load and velocity dependence of friction mediated by dynamics of interfacial contacts

Wengen Ouyang, Shivaprakash N. Ramakrishna, Antonella Rossi, Michael Urbakh, Nicholas D. Spencer, Andrea Arcifa*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Studying the frictional properties of interfaces with dynamic chemical bonds advances understanding of the mechanism underlying rate and state laws, and offers new pathways for the rational control of frictional response. In this work, we revisit the load dependence of interfacial chemical-bond-induced (ICBI) friction experimentally and find that the velocity dependence of friction can be reversed by changing the normal load. We propose a theoretical model, whose analytical solution allows us to interpret the experimental data on timescales and length scales that are relevant to experimental conditions. Our work provides a promising avenue for exploring the dynamics of ICBI friction.

Original languageEnglish
Article number116102
JournalPhysical Review Letters
Volume123
Issue number11
DOIs
StatePublished - 9 Sep 2019

Funding

FundersFunder number
European Cooperation in Science and TechnologyMP1303
Deutsche ForschungsgemeinschaftBA 1008/21-1
Israel Science Foundation1141/18

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