摘要
采用Frenkel-Kontorova模型和涨落-耗散机制相结合的方法模拟一维原子链在复合准周期势能下纳米摩擦过程,考察了在复合准周期势能下各种因素对摩擦的调制作用。结果表明在复合势能形式中对摩擦起到主要调制作用的为构成复合势能中周期较小的余弦势能,此势能的周期和振幅的大小决定了调制作用的强弱。
A method based on fluctuation-dissipation mechanism and Frenkel-Kontorova model was used to calculate the friction coefficient for a one-dimensional atom chain sliding on a compound quasi-period potential. The modulation of various factors in this situation was investigated. The calculation result was that the friction coefficient is modulated by the potential that has smaller period in a compound quasi-period potential, and this modulation effect is decided by the period and amplitude of the potential.
出处
《润滑与密封》
CAS
CSCD
北大核心
2009年第3期52-57,共6页
Lubrication Engineering
基金
河南工业大学校基金资助项目(06XJC034)
关键词
分子动力学模拟
复合准周期势能
摩擦因数
振幅比
周期比
molecular dynamics simulation
compound quasi-period potential
friction coefficient
amplitude proportion
period proportion
