| Identifiant de l'article : |
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ensl-00662521, version 1 |
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| Identifiant arXiv : |
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arXiv:1201.4969 |
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| Domaine : |
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Physique/Matière Condensée/Mécanique statistique
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| Titre : |
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Collective effects at frictional interfaces |
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| Auteur(s) : |
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Oleg Braun1, Michel Peyrard2, D. V. Stryzheus1, Erio Tosatti3, 4, 5 |
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| Laboratoire : |
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| 1 : |
Institute of Physics |
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Phys-ENS - Laboratoire de Physique de l'ENS Lyon |
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SISSA / ISAS - Scuola Internazionale Superiore di Studi Avanzati / International School for Advanced Studies |
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CNR-IOM - Istituto Officina dei Materiali |
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ICTP - International Centre for Theroetical Physics |
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| Résumé : |
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We discuss the role of the long-range elastic interaction between the contacts inside an inhomogeneous frictional interface. The interaction produces a characteristic elastic correlation length $\lambda_c = a^2 E / k_c$ (where $a$ is the distance between the contacts, $k_c$ is the elastic constant of a contact, and $E$ is the Young modulus of the sliding body), below which the slider may be considered as a rigid body. The strong inter-contact interaction leads to a narrowing of the effective threshold distribution for contact breaking and enhances the chances for an elastic instability to appear. Above the correlation length, $r > \lambda_c$, the interaction leads to screening of local perturbations in the interface, or to appearance of collective modes --- frictional cracks propagating as solitary waves. |
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Langue du texte
intégral : |
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Anglais |
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| Mots-clés : |
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Boundary lubrication – Nanotribology – Viscosity – Master equation – Stick-slip |
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| Contrat, financement : |
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PICS CNRS-Ukraine 5421 |
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