Atomistic mechanisms for frictional energy dissipation during continuous sliding

Abstract After more than a century of detailed investigations into sliding friction, we have not arrived yet at a basic understanding of energy dissipation, even for the simple geometry of a rigid slider moving over a perfectly periodic counter surface. In this article, we use a first-principles-bas...

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Autores principales:	S. Yu. Krylov, J. W. M. Frenken
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/526024d5672f47f397a3b4b40d9c17e8
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spelling	oai:doaj.org-article:526024d5672f47f397a3b4b40d9c17e82021-12-02T18:08:46ZAtomistic mechanisms for frictional energy dissipation during continuous sliding10.1038/s41598-021-99437-z2045-2322https://doaj.org/article/526024d5672f47f397a3b4b40d9c17e82021-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-99437-zhttps://doaj.org/toc/2045-2322Abstract After more than a century of detailed investigations into sliding friction, we have not arrived yet at a basic understanding of energy dissipation, even for the simple geometry of a rigid slider moving over a perfectly periodic counter surface. In this article, we use a first-principles-based analysis to establish the atomistic mechanisms of frictional energy dissipation for a rigid object that moves continuously in the periodic surface potential landscape of a solid with vibrational degrees of freedom. We identify two mechanisms that can be viewed as (i) the continuous pumping of energy into the resonant modes, if these exist, and (ii) the destructive interference of the force contributions introduced by all excited phonon modes. These mechanisms act already in a purely dynamic system that includes independent, non-interacting phonon modes, and they manifest irreversibility as a kind of “dynamical stochastization”. In contrast to wide-spread views, we show that the transformation of mechanical energy into heat, that always takes place in real systems due to the coupling between phonon modes, can play only a minor role in the appearance of friction, if any. This insight into the microscopic mechanisms of energy dissipation opens a new, direct way towards true control over friction.S. Yu. KrylovJ. W. M. FrenkenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q S. Yu. Krylov J. W. M. Frenken Atomistic mechanisms for frictional energy dissipation during continuous sliding
description	Abstract After more than a century of detailed investigations into sliding friction, we have not arrived yet at a basic understanding of energy dissipation, even for the simple geometry of a rigid slider moving over a perfectly periodic counter surface. In this article, we use a first-principles-based analysis to establish the atomistic mechanisms of frictional energy dissipation for a rigid object that moves continuously in the periodic surface potential landscape of a solid with vibrational degrees of freedom. We identify two mechanisms that can be viewed as (i) the continuous pumping of energy into the resonant modes, if these exist, and (ii) the destructive interference of the force contributions introduced by all excited phonon modes. These mechanisms act already in a purely dynamic system that includes independent, non-interacting phonon modes, and they manifest irreversibility as a kind of “dynamical stochastization”. In contrast to wide-spread views, we show that the transformation of mechanical energy into heat, that always takes place in real systems due to the coupling between phonon modes, can play only a minor role in the appearance of friction, if any. This insight into the microscopic mechanisms of energy dissipation opens a new, direct way towards true control over friction.
format	article
author	S. Yu. Krylov J. W. M. Frenken
author_facet	S. Yu. Krylov J. W. M. Frenken
author_sort	S. Yu. Krylov
title	Atomistic mechanisms for frictional energy dissipation during continuous sliding
title_short	Atomistic mechanisms for frictional energy dissipation during continuous sliding
title_full	Atomistic mechanisms for frictional energy dissipation during continuous sliding
title_fullStr	Atomistic mechanisms for frictional energy dissipation during continuous sliding
title_full_unstemmed	Atomistic mechanisms for frictional energy dissipation during continuous sliding
title_sort	atomistic mechanisms for frictional energy dissipation during continuous sliding
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/526024d5672f47f397a3b4b40d9c17e8
work_keys_str_mv	AT syukrylov atomisticmechanismsforfrictionalenergydissipationduringcontinuoussliding AT jwmfrenken atomisticmechanismsforfrictionalenergydissipationduringcontinuoussliding
_version_	1718378627418030080

Atomistic mechanisms for frictional energy dissipation during continuous sliding

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