Kinetics and dynamics of frictional stick-slip in mesoscopic boundary lubrication (Articolo in rivista)

Type
Label
  • Kinetics and dynamics of frictional stick-slip in mesoscopic boundary lubrication (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1080/14786435.2011.575410 (literal)
Alternative label
  • Braun, O. M.; Tosatti, Erio (2011)
    Kinetics and dynamics of frictional stick-slip in mesoscopic boundary lubrication
    in Philosophical magazine (2003, Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Braun, O. M.; Tosatti, Erio (literal)
Pagina inizio
  • 3253 (literal)
Pagina fine
  • 3275 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 91 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 23 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 24 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • National Academy of Sciences Ukraine; International School for Advanced Studies; CNR INFM Democritos Natl Simulat Ctr; Abdus Salam International Centre for Theoretical Physics (literal)
Titolo
  • Kinetics and dynamics of frictional stick-slip in mesoscopic boundary lubrication (literal)
Abstract
  • The kinetics and dynamics of frictional stick-slip motion of a slider of size extending from mesoscopic upward is analyzed within the framework of a multi-contact, earthquake-like model. The microscopic contacts are characterized by a distribution of static thresholds for individual breaking. The condition for an overall elastic instability leading to stick-slip sliding are derived and details of the slip motion are studied theoretically. The crucial model parameters emerging from this analysis include the delay time for each micro-contact to reform after breaking, the strength of elastic interaction between the contacts, the elasticity of contacts and of the slider, and the distribution of static thresholds for their breaking. The dynamics is also studied with the help of a scaling procedure. As a prototype application, we adopt parameters appropriate to describe recent surface force apparatus (SFA) boundary lubrication experiments. Despite suggestions of extremely large lubricant viscosities, the experimental data are shown to be fully compatible with ordinary, bulk-like viscosity values once the multi-contact aspects are taken into account. (literal)
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