A friction resonance control method under commensurate and incommensurate conditions

By establishing a graphene molecular dynamics friction model and studying the friction energy consumption under different excitation conditions, the mechanism of friction resonance under commensurate and incommensurate states was revealed, the unknown impact of friction energy dissipation was solved, and a theoretical basis for energy dissipation regulation was provided.

CN116844653BActive Publication Date: 2025-09-26LANZHOU UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202310824684.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-06
Publication Date
2025-09-26
Estimated Expiration
2043-07-06

AI Technical Summary

Technical Problem

The effects of frictional energy dissipation and its phonon mechanism in both commensurate and incommensurate states are still unclear, especially the effects of cosine excitations of different frequencies on frictional energy dissipation have not been effectively studied.

Method used

A molecular dynamics friction model consisting of a square graphene flake probe and a double-layer graphene substrate was established. By applying sinusoidal excitation, the effects of different frequencies, amplitudes, and temperatures on friction energy consumption were studied. Combined with fast Fourier transform and phonon number calculation, the friction resonance and energy consumption mechanism were revealed.

Benefits of technology

The effects of excitation frequency, amplitude and temperature on friction energy consumption between graphene layers were systematically studied, the causes of wear and collapse of the friction model were explained, and theoretical guidance was provided for regulating the energy dissipation of nanoscale graphene resonators.

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Abstract

The present invention relates to a method for controlling friction resonance under commensurate and incommensurate conditions, the method comprising the following steps: (1) using a square graphene sheet as a probe and a double-layer graphene as a substrate, establishing a molecular dynamics friction model: each carbon atom on the probe y and z Direction spring, x ⑵ Determine the effects of excitation frequency, excitation amplitude, and temperature on frictional energy dissipation between commensurate and noncommensurate graphene layers; ⑶ Determine the effects of excitation frequency, excitation amplitude, and temperature on the instantaneous displacement and total sliding distance of commensurate and noncommensurate graphene probes; ⑷ ​​Reveal the effects of frictional resonance on energy dissipation between commensurate and noncommensurate graphene layers and the causes of wear and even collapse of graphene models; ⑸ Determine the intrinsic mechanism of the effect of temperature on frictional energy dissipation between commensurate and noncommensurate graphene layers; ⑹ Reveal the phonon mechanism of different frictional energy dissipations. This invention can provide theoretical guidance for regulating the energy dissipation of nanoscale graphene resonators and avoiding the occurrence of resonance.
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