Molecular dynamics study of wearless friction in sub-micrometer size mechanisms and actuators based on an atomistic simplified model
Molecular dynamics study of wearless friction in sub-micrometer size mechanisms and actuators based on an atomistic simplified model
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基于原子简化模型的亚微米尺寸机构和执行器中无磨损摩擦的分子动力学研究
DOI：
10.1016/s0927-0256(00)00052-5
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发表时间：
2000
影响因子：
3.3
通讯作者：
N. Sakudo
中科院分区：
文献类型：
--
作者：
K. Hayashi;Akifumi Maeda;Tomohisa Terayama;N. Sakudo
利用分子动力学模拟方法，系统地研究了稳态滑动过程中摩擦阻力随实验参数的变化规律。探索介观系统中无磨损摩擦的普遍特征揭示了摩擦力对滑动速度、载荷和平均温度的独特依赖性。这种依赖性的原子起源进行了讨论，在“尺寸效应”的基础上的假设，摩擦功率对应于通过强迫振动和随后的正常声子模式之间的能量转移，由于非谐性粒子间的潜力的能量耗散率。
Frictional resistance accompanying steady sliding motion is studied systematically as a function of various experimental parameters by means of molecular dynamics simulation using a two-dimensional model. Exploration of universal features lying in wearless friction in mesoscopic systems revealed unique dependence of the frictional force on sliding velocity, applied load, and mean temperature. Atomistic origin of this dependence is discussed in terms of “size effect” on the basis of a hypothesis that the frictional power corresponds to the rate of energy dissipation via forced vibration and subsequent energy transfer between normal phonon modes due to anharmonicity of inter-particle potential.