Stick-Slip Friction and Energy Dissipation in Boundary Lubrication

Yajie Lei and Yongsheng Leng
Phys. Rev. Lett. 107, 147801 – Published 30 September 2011

Abstract

Shearing of a simple nonpolar film, right after the liquid-to-solid phase transition under nanometer confinement, is studied by using a liquid-vapor molecular dynamics simulation method. We find that, in contrast with the shear melting and recrystallization behavior of the solidlike phase during the stick-slip motion, interlayer slips within the film and wall slips at the wall-film interface are often observed. The ordered solidified film is well maintained during the slip. Through the time variations of the frictional force and potential energy change within the film, we find that both the friction dissipation during the slip and the potential energy decay after the slip in the solidified film take a fairly large portion of the total energy dissipation.

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  • Received 20 April 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.147801

© 2011 American Physical Society

Authors & Affiliations

Yajie Lei and Yongsheng Leng*

  • Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, D.C. 20052, USA

  • *leng@gwu.edu

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Issue

Vol. 107, Iss. 14 — 30 September 2011

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