Understanding topographic dependence of friction with micro- and nano-grooved surfaces

Chengjiao Yu, Hualong Yu, Geng Liu, Wei Chen, Bo He, Q. Jane Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

The work reported in this paper aims at understanding sliding friction anisotropy at the nano-, micro-, and macroscales with respect to surface asperity orientation and exploring the mechanisms behind this phenomenon. Experiments were conducted by probing surfaces with grooves parallel or perpendicular to the direction of relative motion. Continuum mechanics analyses with the FEM and a semianalytical static friction model and the atomic molecular dynamics simulation were performed for the mechanism exploration. Friction anisotropy was understood from the differences in contact area, surface stiffness, stiction length, and energy barrier fromthe continuummechanics prospective and fromthat in the stick-slip phenomena at the atomic level.

Original languageEnglish (US)
Pages (from-to)145-156
Number of pages12
JournalTribology Letters
Volume53
Issue number1
DOIs
StatePublished - Jan 2014

Keywords

  • Energy barrier
  • Friction anisotropy
  • Molecular dynamics (MD) simulation
  • Stick-slip
  • Surface textures' orientation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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