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| 纳米尺度下对黏滑现象的分子动力学模拟 | |
| 引用本文： | 陈丽换,张国栋,陈云飞. 纳米尺度下对黏滑现象的分子动力学模拟[J]. 东南大学学报(自然科学版), 2010, 40(1). DOI: 10.3969/j.issn.1001-0505.2010.01.024 |
| 作者姓名： | 陈丽换 张国栋 陈云飞 |
| 作者单位： | 东南大学机械工程学院,南京,211189;金陵科技学院机电工程学院,南京,211169;东南大学机械工程学院,南京,211189 |
| 基金项目： | 国家自然科学基金资助项目(50676019) |
| 摘 要： | 采用分子动力学模拟的方法研究了硅针尖在金刚石基底滑动的黏滑现象,讨论了纳米尺度下温度、滑动速度、载荷等因素对黏滑摩擦的影响.模拟结果表明,在纳米尺度下,原子排列规则的两固体间的滑动摩擦力呈现出周期性的锯齿型变化.摩擦力曲线的波动周期取决于滑动过程中基体沿滑动方向的晶格常数,同时受接触面原子排列结构变化的影响.在较低温度范围内,滑动摩擦力随温度的升高近似呈线性减小,对滑动摩擦力的波动周期和振幅影响不大.在一定速度范围内,滑动摩擦力主要受黏着作用的影响,滑动摩擦力的大小随速度的增大近似呈线性增大.在一定载荷范围内,滑动摩擦力随载荷的增大近似呈线性增大,振动周期变大. |
| 关 键 词： | 分子动力学模拟 摩擦力 温度 滑移速度 法向载荷 |
Molecular dynamics simulation of stick-slip at nanoscale |
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| Chen Lihuan,Zhang Guodong,Chen Yunfei. Molecular dynamics simulation of stick-slip at nanoscale[J]. Journal of Southeast University(Natural Science Edition), 2010, 40(1). DOI: 10.3969/j.issn.1001-0505.2010.01.024 | |
| Authors: | Chen Lihuan Zhang Guodong Chen Yunfei |
| Affiliation: | 1 School of Mechanical Engineering;Southeast University;Nanjing 211189;China;2 School of Electrical and Mechanical Engineering;College of Jinling Technology;Nanjing 211169;China |
| Abstract: | Molecular dynamics(MD) simulation of nanoscale stick-slip phenomena was performed for a silicon tip in contact with the diamond substrate.The influence of sliding velocity,normal force and temperature on the stick-slip at the nanoscale was analyzed.It is found that the regular arrangement of the atoms on the sliding surface induces a periodic sawtooth-like behavior in the friction curve.The period of the "sawtooth" depends on the lattice constant of the substrate along the sliding direction,and it is affect... |
| Keywords: | molecular dynamics simulation friction temperature sliding velocity normal force |
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