2005/02/27 by Z. Farkas, Zénó Farkas, S. R. Dahmen +3
Engineering · Physics and Astronomy · #Adhesion, Friction, and Surface Interactions #Brake Systems and Friction Analysis #Force Microscopy Techniques and Applications #cond-mat.mtrl-sci
paper · pdf · doi:10.1088/1742-5468/2005/06/p06015
published as J. Stat. Mech.: Theor. Exp. (2005) P06015 · 10 pages, 2 figures, revtex4
arxiv created 2005/02/27 · openalex publication_date 2005/06/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
A simple model for solid friction is analysed. It is based on tangential springs representing interlocked asperities of the surfaces in contact. Each spring is given a maximal strain according to a probability distribution. At their maximal strain the springs break irreversibly. Initially all springs are assumed to have zero strain, because at static contact local elastic stresses are expected to relax. Relative tangential motion of the two solids leads to a loss of coherence of the initial state: the springs get out of phase due to differences in their sizes. This mechanism alone is shown to lead to a difference between static and dynamic friction forces already. We find that in this case the ratio of the static and dynamic coefficients decreases with increasing relative width of the probability distribution, and has a lower bound of 1 and an upper bound of 2.