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Velocity, temperature, and normal force dependence on friction: An analytical and molecular dynamics study
Author(s) -
Dias R. A.,
Coura P. Z.,
Costa B. V.
Publication year - 2010
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200945146
Subject(s) - quasistatic process , molecular dynamics , work (physics) , physics , surface (topology) , dynamics (music) , classical mechanics , crystal (programming language) , statistical physics , thermodynamics , quantum mechanics , mathematics , geometry , acoustics , computer science , programming language
In this work we use a quasistatic Tomlinson model to propose an extension of the analytical one‐dimensional model developed by Gnecco et al. [Phys. Rev. Lett. 84 , 1172 (2000)] and Sang et al. [Phys. Rev. Lett. 87 , 174301 (2001)] to describe some aspects of friction. In our model we include the normal force and the dependence with the direction of movement of the object which is dragged over the surface. The angular dependence of the model is in agreement with the results of the Frenkel–Kontorova–Tomlinson model discussed by Gyalog and Thomas [Z. Phys. B 104 , 669 (1997)]. We compare our theoretical results with molecular dynamics (MD) simulations of a tip sliding over a body centered crystal surface in the [001] direction whose particles interact through a Lennard–Jones (6–12) potential.