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Chin. Phys. B, 2020, Vol. 29(4): 046802    DOI: 10.1088/1674-1056/ab7da0
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

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 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
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.
Keywords:  friction      polytetrafluoroethylene (PTFE)      coarse-grained molecular dynamics      load  
Received:  17 January 2020      Revised:  27 February 2020      Accepted manuscript online: 
PACS:  68.35.Af (Atomic scale friction)  
  36.20.-r (Macromolecules and polymer molecules)  
  31.15.at (Molecule transport characteristics; molecular dynamics; electronic structure of polymers)  
Fund: 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).
Corresponding Authors:  Deng Pan     E-mail:  pandeng1896@ysu.edu.cn

Cite this article: 

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) Influence of external load on friction coefficient of Fe-polytetrafluoroethylene 2020 Chin. Phys. B 29 046802

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