Molecular dynamics study on atomistic mechanisms through which the lattice-constant pair determines the threshold speed of wearless sliding nanofriction
Communications in Computational Physics
Global Science Press
A threshold phenomenon characterizing ensemble-averaged dependence of wearless-nanofrictional force between nonmetallic solids on sliding velocity under the steady condition was investigated in terms of molecular dynamics. The forced vibration triggering dramatic increase in the rate of frictional-heat generation at sliding speeds above the threshold was successfully extracted from random thermal motion of atoms near the sliding interface. Rules useful for prediction of the threshold were elucidated by analyses of temporal and spatial patterns of such forced vibrations.
NEMS Nanotribology Complex System Molecular Dynamics Simulation