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

Yang, Cheng; Zhu, Pengzhe; Li, Rui

doi:10.3390/cryst8030129

Cited by 14 publications

(8 citation statements)

References 27 publications

(28 reference statements)

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“…Apart from experimental studies of graphene friction, theoretical studies have been conducted on various factors affecting graphene friction. Molecular dynamics (MD) simulations were applied to investigate fundamental atomic-scale mechanisms of graphene friction, in which some models were built to explain that compared with the bulk grain region, the grain boundary region has greater contribution to the friction [39]. The effect of external in-plane strain on the frictional behavior of multilayer graphene was studied with LAMMPS (a software specialized for MD simulations), and the conclusion is that the strain-induced friction coefficient variations are attributed to atomic-scale contacted area changing [40].…”

Section: Frictionmentioning

confidence: 99%

A Review of Current Development of Graphene Mechanics

et al. 2018

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Graphene, a two-dimensional carbon in honeycomb crystal with single-atom thickness, possesses extraordinary properties and fascinating applications. Graphene mechanics is very important, as it relates to the integrity and various nanomechanical behaviors including flexing, moving, rotating, vibrating, and even twisting of graphene. The relationship between the strain and stress plays an essential role in graphene mechanics. Strain can dramatically influence the electronic and optical properties, and could be utilized to engineering those properties. Furthermore, graphene with specific kinds of defects exhibit mechanical enhancements and thus the electronic enhancements. In this short review, we focus on the current development of graphene mechanics, including tension and compression, fracture, shearing, bending, friction, and dynamics properties of graphene from both experiments and numerical simulations. We also touch graphene derivatives, including graphane, graphone, graphyne, fluorographene, and graphene oxide, which carve some fancy mechanical properties out from graphene. Our review summarizes the current achievements of graphene mechanics, and then shows the future prospects.

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Section: Frictionmentioning

confidence: 99%

A Review of Current Development of Graphene Mechanics

et al. 2018

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“…Gao et al [22] performed MD simulations and demonstrated that friction can be suppressed in thin-film boundary lubricated junctions by normal vibration with small amplitudes. Recently, MD simulations were carried out to study the influence of normal vibration on the friction at the atomic scale [23]. They found that the average friction increases in a high-frequency range.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation of lateral ultrasonic excitation in atomic-scale friction

Wang

Duan

Dong

et al. 2020

Mater. Res. Express

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The normal and lateral (in the sliding direction) vibration can achieve 'dynamic superlubricity' at the atomic scale which has been studied and proved by other researchers. In this study, we have found that the lateral excitation (perpendicular to the sliding direction) which has rarely been studied before can also reduce the average friction force greatly. By utilizing the tip path on the interaction potential energy surface and plotting the interaction potential energy as a function of support position, we elucidated the reason of dynamic superlubricity caused by lateral excitation. The details of the lateral excitation at the atomic scale friction have been demonstrated by molecular dynamics simulations and numerical computation based on the Prandtl-Tomlinson model. This study can increase the understanding of the ultrasonic vibration excitation at atomic scale friction.

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“…The friction and the normal force to friction were treated as relative values to describe the changes during the fretting processes as presented in Figs. 1(a) and 1(b) [43]. As a result, the influence of the forces before equilibrium can be excluded.…”

Section: General Trendmentioning

confidence: 99%

“…Meanwhile, diamond, which is an atomic crystal, is fully bonded with certain orientations by covalent electrons. Given the relationship, the possibility for a diamond atom to transfer will be much lower than an aluminum ion/atom [20,24,43,44], that is x , and the number of atoms/ions in the activation volume (V) N at the detached surface. As a result, free electrons promote residual stress along the lattice deformation by eliminating the bonding direction trends.…”

Section: Difference Of Atom Redistribution/transfer Modesmentioning

confidence: 99%

Multiscale analysis of friction behavior at fretting interfaces

et al. 2020

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Friction behavior at fretting interfaces is of fundamental interest in tribology and is important in material applications. However, friction has contact intervals, which can accurately determine the friction characteristics of a material; however, this has not been thoroughly investigated. Moreover, the fretting process with regard to different interfacial configurations have also not been systematically evaluated. To bridge these research gaps, molecular dynamics (MD) simulations on Al-Al, diamond-diamond, and diamond-silicon fretting interfaces were performed while considering bidirectional forces. This paper also proposes new energy theories, bonding principles, nanoscale friction laws, and wear rate analyses. With these models, semi-quantitative analyses of coefficient of friction (CoF) were made and simulation outcomes were examined. The results show that the differences in the hardness, stiffness modulus, and the material configuration have a considerable influence on the fretting process. This can potentially lead to the force generated during friction contact intervals along with changes in the CoF. The effect of surface separation can be of great significance in predicting the fretting process, selecting the material, and for optimization.

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

Cited by 14 publications

References 27 publications

A Review of Current Development of Graphene Mechanics

A Review of Current Development of Graphene Mechanics

Molecular dynamics simulation of lateral ultrasonic excitation in atomic-scale friction

Multiscale analysis of friction behavior at fretting interfaces

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