中国物理B ›› 2020, Vol. 29 ›› Issue (4): 46802-046802.doi: 10.1088/1674-1056/ab7da0

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Influence of external load on friction coefficient of Fe-polytetrafluoroethylene

Xiu-Hong Hao(郝秀红), Deng Pan(潘登), Ze-Yang Zhang(张泽洋), Shu-Qiang Wang(王树强), Yu-Jin Gao(高玉金), Da-Peng Gu(谷大鹏)   

  1. 1 School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China;
    2 Aviation Key Laboratory of Science and Technology on Generic Technology of Self-Lubricating Spherical Plain Bearing, Yanshan University, Qinhuangdao 066004, China;
    3 AGC Automotive(China) Co., Ltd., Qinhuangdao 066004, China
  • 收稿日期:2020-01-17 修回日期:2020-02-27 出版日期:2020-04-05 发布日期:2020-04-05
  • 通讯作者: Deng Pan E-mail:pandeng1896@ysu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51605418) and the Natural Science Foundation of Hebei Province, China (Grant Nos. E2016203206 and E2019203033).

Influence of external load on friction coefficient of Fe-polytetrafluoroethylene

Xiu-Hong Hao(郝秀红)1,2, Deng Pan(潘登)1,2, Ze-Yang Zhang(张泽洋)1, Shu-Qiang Wang(王树强)1,2, Yu-Jin Gao(高玉金)3, Da-Peng Gu(谷大鹏)1,2   

  1. 1 School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China;
    2 Aviation Key Laboratory of Science and Technology on Generic Technology of Self-Lubricating Spherical Plain Bearing, Yanshan University, Qinhuangdao 066004, China;
    3 AGC Automotive(China) Co., Ltd., Qinhuangdao 066004, China
  • Received:2020-01-17 Revised:2020-02-27 Online:2020-04-05 Published:2020-04-05
  • Contact: Deng Pan E-mail:pandeng1896@ysu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51605418) and the Natural Science Foundation of Hebei Province, China (Grant Nos. E2016203206 and E2019203033).

摘要: A coarse-grained molecular dynamics simulation model was developed in this study to investigate the friction process occurring between Fe and polytetrafluoroethylene (PTFE). We investigated the effect of an external load on the friction coefficient of Fe-PTFE using the molecular dynamics simulations and experimental methods. The simulation results show that the friction coefficient decreases with the external load increasing, which is in a good agreement with the experimental results. The high external load could result in a larger contact area between the Fe and PTFE layers, severer springback as a consequence of the deformed PTFE molecules, and faster motion of the PTFE molecules, thereby affecting the friction force and normal force during friction and consequently varying the friction coefficient.

关键词: friction, polytetrafluoroethylene (PTFE), coarse-grained molecular dynamics, load

Abstract: A coarse-grained molecular dynamics simulation model was developed in this study to investigate the friction process occurring between Fe and polytetrafluoroethylene (PTFE). We investigated the effect of an external load on the friction coefficient of Fe-PTFE using the molecular dynamics simulations and experimental methods. The simulation results show that the friction coefficient decreases with the external load increasing, which is in a good agreement with the experimental results. The high external load could result in a larger contact area between the Fe and PTFE layers, severer springback as a consequence of the deformed PTFE molecules, and faster motion of the PTFE molecules, thereby affecting the friction force and normal force during friction and consequently varying the friction coefficient.

Key words: friction, polytetrafluoroethylene (PTFE), coarse-grained molecular dynamics, load

中图分类号:  (Atomic scale friction)

  • 68.35.Af
36.20.-r (Macromolecules and polymer molecules) 31.15.at (Molecule transport characteristics; molecular dynamics; electronic structure of polymers)