O mistério do atrito

Paper interessante, capa do PRL. Muitos estudantes não sabem que tópicos simples como atrito não são entendidos pelos físicos e são temas de pesquisa atual.

Modeling Friction on a Mesoscale: Master Equation for the Earthquakelike Model

O. M. Braun
Institute of Physics, National Academy of Sciences of Ukraine, 46 Science Avenue, 03028 Kiev, Ukraine
M. Peyrard
Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, 69364 Lyon Cédex 07, France
(Received 23 November 2007; published 25 March 2008)
The earthquakelike model with a continuous distribution of static thresholds is used to describe the properties of solid friction. The evolution of the model is reduced to a master equation which can be solved analytically. This approach naturally describes stick-slip and smooth-sliding regimes of tribological systems within a framework which separates the calculation of the friction force from the studies of the properties of the contacts.
©2008 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v100/e125501
doi:10.1103/PhysRevLett.100.125501
PACS: 81.40.Pq, 46.55.+d
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