Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10644548 | Computational Materials Science | 2008 | 4 Pages |
Abstract
A law of friction accompanying steady sliding motion between crystal lattices constituting a nano-electromechanical system (NEMS) was revealed by molecular dynamics simulations using simplified models. A threshold phenomenon was predicted as a common feature characterizing dependence of the wearless frictional resistance on the sliding velocity vstroke. The threshold sliding velocity vth linearly depends on the lattice-constant ratio, which was turned out to be a key parameter determining vth. The increased dynamic-frictional force in the case of vstroke > vth possibly reflects enhanced rate of energy dissipation via anharmonicity of the interatomic potential due to resonant excitation of phase-matched normal phonon modes in the crystal lattices sliding relative to each other.
Keywords
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Physical Sciences and Engineering
Engineering
Computational Mechanics
Authors
Keiji Hayashi, Daisuke Tanaka, Harumi Araki, Tomoki Maruyama, Daisuke Matsumura, Noriyoshi Omote, Misato Kaneko,