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Crystals 2018, 8(3), 129; https://doi.org/10.3390/cryst8030129

The Influence of Vertical Vibration on Nanoscale Friction: A Molecular Dynamics Simulation Study

1
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
2
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
*
Author to whom correspondence should be addressed.
Received: 15 January 2018 / Revised: 24 February 2018 / Accepted: 7 March 2018 / Published: 9 March 2018
(This article belongs to the Special Issue Graphene Mechanics)
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Abstract

The influence of vibration on friction at the nanoscale was studied via molecular dynamics (MD) simulations. The results show that average friction increases in a high-frequency range. This can be attributed to the vibration of the tip following vibration excitation, which results in peaks of repulsive interaction between tip and substrate and leads to higher friction. However, when the frequency is lower than a certain value, friction decreases. This is because vibration excitation results not in an obvious vibration of the tip but in a slightly larger interface distance, which leads to a decrease in friction. View Full-Text
Keywords: nanoscale friction; vertical vibration; molecular dynamics nanoscale friction; vertical vibration; molecular dynamics
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Cheng, Y.; Zhu, P.; Li, R. The Influence of Vertical Vibration on Nanoscale Friction: A Molecular Dynamics Simulation Study. Crystals 2018, 8, 129.

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