Abstract
A numerical 3D model of friction at mesoscale of the contact patch between steel samples and composite steel samples with carbon nanoinclusions has been developed based on the movable cellular automaton method. The response function of automata simulating steel corresponds to an elastic-plastic body with linear hardening, and the function for simulating carbon corresponds to an elastic-plastic body with bilinear hardening. Von Mises criterion is used for breaking bonds between the automata, and the criterion based on plastic heat is used for coupling the automata. The values of basic parameters of the model, as well as the loading conditions, that allow the formation of the characteristic quasi-liquid layer in the friction zone are determined. It was shown that the presence of carbon nanoinclusions in the contact region leads to decreasing of the coefficient of friction, lower values of stress, and higher shear strain in the friction zone.
Highlights
It is known that one of the main reasons for machine breakdown is the wear of contacting joints
Carrying out experimental measurements directly in this zone in dynamics is too difficult to implement, to study the processes taking place in the contact zone based on the methods of numerical simulation is in great demand [3,4,5,6]
Most of movable cellular automata (MCA) applications for sliding friction are made in 2D statement [10,11,12,13], the aim of the work is to develop a 3D numerical model of the sliding friction of steel samples at the scale of contact patch and study on its basis the influence of carbon nanoinclusions on the sliding friction
Summary
It is known that one of the main reasons for machine breakdown is the wear of contacting joints. Today it is known that the processes of friction and wear are a combination of successive transitions of material from one body to another. In the contact zone of two bodies, intense processes of deformation, mixing and damage accumulation occur. Carrying out experimental measurements directly in this zone in dynamics is too difficult to implement, to study the processes taking place in the contact zone based on the methods of numerical simulation is in great demand [3,4,5,6]. The ability to explicitly describe the accumulation and generation of damage, as well as mass mixing, makes the method of movable cellular automata (MCA) a powerful tool for studying the dynamics of contact interaction [7,8,9]. Most of MCA applications for sliding friction are made in 2D statement [10,11,12,13], the aim of the work is to develop a 3D numerical model of the sliding friction of steel samples at the scale of contact patch and study on its basis the influence of carbon nanoinclusions on the sliding friction
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