Atomic simulation of contact behavior during sliding inception of an asperity

Yeau Ren Jeng, Shin Rung Peng

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Advances in nanotribology prompt the understanding of lateral junction growth at the nanoscale an emerging issue. Our previous atomistic simulations have presented the atomic origins of the lateral junction growth mechanism at the nanoscale, which is mainly the slips of the atoms within the asperity. In the current study, we reveal that the lateral force increases with an increasing lateral displacement of the flat until the point at which junction growth ceases; corresponding to the maximum value of the tangential force coefficient. The transition of the lateral force profile from a smoothly increasing profile to a periodic sawtooth-like profile coincides with the point at which lateral junction growth ceases and stick-slip motion commences. However, the presence of an adsorbed layer on the nano-asperity surface suppresses the stick-slip motion and prompts a smooth sliding contact between the asperity and the flat.

Original languageEnglish
Pages (from-to)70-74
Number of pages5
JournalWear
Volume276-277
DOIs
Publication statusPublished - 2012 Feb 15

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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