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Title Thermodynamic theory of two rough surfaces friction in the boundary lubrication mode
Authors Khomenko, Oleksii Vitaliiovych  
Liashenko, Yakiv Oleksandrovych  
Keywords граничное трение
модуль сдвига
прерывистый режим
сдвиговые напряжения и деформация
ультратонкая пленка смазки
фазовый переход
Type Article
Date of Issue 2012
URI http://essuir.sumdu.edu.ua/handle/123456789/30623
Publisher Tribology Letters
License
Citation I.A. Lyashenko, A.V. Khomenko, Thermodynamic theory of two rough surfaces friction in the boundary lubrication mode // Tribology Letters. - 2012. - Vol.48, No.1. - P.63-75.
Abstract The thermodynamic theory of thin lubricant film melting, confined between two hard rough solid surfaces, is built using the Landau phase transition approach. For the description of a melting condition the order parameter is introduced which is a periodical part of microscopic medium density function. The shear modulus of lubricant is proportional to the order parameter squared. The thermodynamic and shear melting are described consistently. A mechanical analogue of a tribological system in the boundary friction mode is studied. The time dependencies of the friction force, the relative velocity of the interacting surfaces, and the elastic component of the shear stresses appearing in the lubricant are obtained. It is shown that the shear modulus of the lubricant and the elastic stresses become zero in the liquid-like state. The irregular stick-slip mode of melting is described, which is observed in experiments. It is shown that the frequency of stiction spikes in the irregular mode increases with growth of the shear velocity. Comparison of the obtained results with experimental data is carried out. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/30623
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