摩擦增强和自参数共振

IF 2.9 3区 工程技术 Q2 ENGINEERING, CHEMICAL Tribology Letters Pub Date : 2024-09-16 DOI:10.1007/s11249-024-01918-5
S. Yu. Krylov
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摘要

最近有趣的实验观察表明,在与悬臂频率和/或其分数(1/n, n = 1, 2, 3, ...)相对应的扫描速度下发生的原子级摩擦增强,可以解释为自参数共振的表现。考虑到原子力显微镜针尖的高柔性,所建立的理论揭示了自参数共振是针尖-悬臂组合系统丰富动态的自然结果。除了解释观察到的摩擦力峰值外,该理论还预测,当洗衣板频率与悬臂频率的有理部分(m/n,m 和 n 为整数)重合时,会出现密集的多个较小峰值。得出的一个重要结论是,摩擦力的共振增强与激发声子的频率无关,它应表现为基体中任何可能的摩擦能量耗散机制,声子、电子或任何其他机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Friction Enhancement and Autoparametric Resonance

Recent intriguing experimental observations of atomic scale friction enhancement, that takes place at scanning velocities correspondent with the cantilever frequency and/or its fractions (1/n, n = 1, 2, 3, …), can be explained as the manifestation of an autoparametric resonance. Taking explicitly into account high flexibility of AFM tips, the developed theory reveals the autoparametric resonance to be a natural consequence of the rich dynamics of the combined tip–cantilever system. Besides the explanation of the observed friction force peaks, the theory predicts a dense multiplicity of smaller peaks to appear when the washboard frequency coincides with a rational part (m/n, with integer m and n) of the cantilever frequency. An important conclusion is made that the resonance enhancement of friction is independent of frequency of excited phonons, and it should manifest itself for any possible mechanism of frictional energy dissipation in the substrate, phononic, electronic, or any other.

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来源期刊
Tribology Letters
Tribology Letters 工程技术-工程:化工
CiteScore
5.30
自引率
9.40%
发文量
116
审稿时长
2.5 months
期刊介绍: Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.
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