Collective Behavior of Asperities in Dry Friction at Small Velocities

Details Collective Behavior of Asperities in Dry Friction at Small Velocities Collective Behavior of Asperities in Dry Friction at Small Velocities

1998-05-29

arxiv.org/abs/cond-mat/9805398v1

Phys. Rev. E 59(1999) 3947-3953

Physics

Condensed Matter

Statistical Mechanics

7 pages, 8 figures, revtex, submitted to Phys. Rev. E

Scientific paper

10.1103/PhysRevE.59.3947

We investigate a simple model of dry friction based on extremal dynamics of asperities. At small velocities, correlations develop between the asperities, whose range becomes infinite in the limit of infinitely slow driving, where the system is self-organized critical. This collective phenomenon leads to effective aging of the asperities and results in velocity dependence of the friction force in the form $F\sim 1- \exp(-1/v)$.

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