Registration Number
0213U000505,
0110U003482
, R & D reports
Title
Friction at the mesoscale.
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Head
Braun Oleg Mikhailovich,
Registration Date
13-02-2013
Organization
Institute of physics NASU
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The subject of the investigation is the frictional interface with a continuous distribution of static frictional thresholds. The aim of the investigation is the developing of the theory of friction on the mesoscopic scale. The theory is developed with the help of the earthquakelike model using the master equation approach. In the investigation the following results were obtained: We investigated the friction at the mesoscopic scale, when it occurs due to rupture and formation of local contacts. We showed that this process can be described by the master equation that can be solved analytically. We found the law of interaction between the contacts, which was subsequently used to study collective effects in the frictional interface and allows us to simulate the process of the destruction of the interface. We proposed a model to describe the dynamics of processes occurring at the interface between two tribo-blocks at the onset of frictional motion. The model can explain the experimental observations, in particular, the role of the material interfaces in the dynamics of the transition to the regime of smooth sliding. We studied collective effects in the frictional interface and found the elastic correlation length. At distances smaller than the correlation length of the elastic interaction between the contacts leads to the concerted avalanche-like motion. At large distances one should take into account the deformation of the slider, and the dynamics of the interface is described by the Frenkel-Kontorova-type model, which allows us to determine analytically the rate of crack propagation in the frictional interface.
Product Description
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Браун Олег Михайлович
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2020-04-02
