Видання зареєстровані авторами шляхом самоархівування
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Item Melting of ultrathin lubricant film due to dissipative heating of friction surfaces(Pleiades publishing, Ltd, 2007) Хоменко, Олексій Віталійович; Хоменко, Алексей Витальевич; Khomenko, Oleksii Vitaliiovych; Ляшенко, Яків Олександрович; Ляшенко, Яков Александрович; Liashenko, Yakiv OleksandrovychMelting of an ultrathin lubricant film during friction between atomically smooth surfaces is studied. Additive noise of shear stress and strain as well as of film temperature is introduced and the phase diagram is constructed. On the diagram, the noise intensity for this temperature and the temperature of friction surfaces determine the regions of sliding, dry, and stick-slip friction. As a result of numerical analysis of the Langevin equation for various regions of the diagram, time series of stresses are constructed, which make it possible to explain the experiment on friction, in which intermittent motion is observed. Lubricant melting due to dissipa-tive heating of friction surface is considered and the experimental time dependences of friction force are interpreted. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/16209Item Jamming Transition with Fluctuations of Characteristic Acceleration/braking Time(Львівський університет, 2004) Хоменко, Олексій Віталійович; Хоменко, Алексей Витальевич; Khomenko, Oleksii Vitaliiovych; Харченко, Дмитро Олегович; Харченко, Дмитрий Олегович; Kharchenko, Dmytro Olehovych; Ющенко, Ольга Володимирівна; Ющенко, Ольга Владимировна; Yushchenko, Olha VolodymyrivnaJamming transition in traffic flow (between free and jammed traffic) for homogeneous car following model has been investigated taking into account fluctuations of characteristic acceleration/braking time. These fluctuations are defined by Ornstein-Uhlenbeck process. The behaviour of the most probable deviation of headway from its optimal value has been studied and phase diagram of the system has been calculated for supercritical and subcritical regimes of jam formation. It has been found that for the first regime the fluctuations of characteristic acceleration/braking time result in coexistence of free moving and jammed traffic, that is typical for the first-order phase transition, and in appearance of two steady states for the second mode. These states correspond to non-zero values of headway deviation at which the formation of jam and congested traffic are possible. Using phase-plain portraits method the kinetics of the system transitions has been analyzed for different domains of the phase diagram for both regimes. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/16193