MECHANISM OF PLASTIC DEFORMATION LOCALIZATION IN POLYCRYSTALLINE PRECIPITATION-HARDENING ALLOYS

KUKAREKO Vladimir A., Dr. Phys.-Math. Sc., Associate Professor, Head of the Center of Structural Research and Tribo-Mechanical Test of Materials and Machine-Building Output, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

The mechanism of strain localization of polycrystallic precipitation hardening materials based on the account of statistical dissipation in allocation of particles on slip planes and dissipation of the size of particles is proposed. The methods of computer simulation have shown that the decrease of the grain size of precipitation hardening alloy and the decrease of particles amount, contained in a grain and also the formation of particles polydisperse mixture at thecoagulative growth stage during aging, intensify the dissipation in allocation of particles on a matrix.

magnetic abrasive treatment, magnetic abrasive composites, mechanical activation, mechanosynthesis, microstructure, mechanocomposites, planetary ball mill

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COMPUTER SIMULATION OF THE COMPOSITES STRUCTURE AND PROPERTIES IN LOADED CONSTRUCTIONS

PLESKACHEVSKII Yuri M., Corresponding Member of the NAS of Belarus, Dr. Techn. Sc., Professor, Advisor of the NAS of Belarus, V.A. Belyi Metal-Polymer Research Institute, Gomel, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SHIMANOVSKY Alexandr O., Dr. Techn. Sc., Associate Professor, Head of Department of Technical Physics and Engineering Mechanics, Belarusian State University of Transport, Gomel, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

The article considers approaches to solutions to the problem concerning composite structure deformations using finite element method. The examples of composite simulations based on the material unit cells and real microstructures are shown. The results of simulations have been obtained for the concrete and reinforced concrete structural elements considering internal contact interactions between the composite matrix and the reinforcing phase.

computer simulation, composite materials, material unit cell, microstructure, contact interaction

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MECHANOSYNTHESIS OF COMPOSITE Fe/SiC POWDERS FOR MAGNETIC ABRASIVE TREATMENT

VITYAZ Petr A., Academician of the NAS of Belarus, Dr. Techn. Sc., Professor, Head of the Staff of the NAS of Belarus, Presidium of the NAS of Belarus, Minsk, The Republic of Belarus

ZHORNIK Victor I., Dr. Techn. Sc., Associate Professor, Deputy Head of the department of mechanical engineering and metallurgy technologies, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KOVALEVA Svetlana A., Senior Researcher of the Laboratory of Nanostructural and Superhard Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KHOMICH Nikolay S., Cand. Techn. Sc., Leading Researcher of the Laboratory of Nanostructural and Superhard Materials, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, The Republic of Belarus

GRIGOREVA Tatyana F., Dr. Chem. Sc., Leading Researcher, Institute of Solid State Chemistry and Mechanochemistry, Novosibirsk, Russia

The results of investigation of structure evolution of powder composition of Fe/SiC during mechanical activation (MA) are described. It is shown that the mechono-composite Fe/SiC is formed by treatment of the composition of Fe/SiC powders in the mill with energy intensity of I = 3 W/g during a short time. The main stages of microstructure formation of the composite Fe/SiC powders include crushing, deformation mixing, submicrostructure fragmentation of components and forming of globular microstructure. The alignment of the phase composition and size range of the particles of mechano-composites Fe/SiC and SiC inclusions takes place during 60 minutes of the MA. The SiC particle size is decreased from 40–180 microns to 0,3–2 microns. The formation of the Fe/SiC composite by MA during 60 minutes occurs without significant interaction between the components.

magnetic abrasive treatment, magnetic abrasive composites, mechanical activation, mechanosynthesis, microstructure, mechanocomposites, planetary ball mill

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FORECASTING OF THE RESIDUAL RESOURCE OF GEAR DRIVES BASED ON THE VIBRATIONPULSE DIAGNOSTICS

ISHIN Nikolay N., Dr. Techn. Sc., Associate Professor, Director of the Science and Technical Centre “Quarry Machinery”, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

GOMAN Arcadiy M., Cand. Techn. Sc., Associate Professor, Head of the Department of Dynamic Analysis and Vibration Diagnostic of Machines, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SKOROKHODOV Andrey S., Cand. Techn. Sc., Leading Researcher of the Department of Dynamic Analysis and Vibration Diagnostic of Machines, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

NATUREVA Marina K., Researcher of the Department of Dynamic Analysis and Vibration Diagnostic of Machines, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ADASHKEVICH Vladimir I., Head of the Sector of Electric Drive and Control and Measuring Systems, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, The Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

The results of a comprehensive theoretical and experimental studies of shock interaction of the toothed profiles in relation to problems of vibration transmission systems of mobile machines are presented. While the determination technique of the actual parameters of gear wheels, as well as residual life of gears according to the results of vibration monitoring in operation has been used.

mobile machine, transmission, technical condition, vibrating monitoring, technique, shock pulse, contact stresses, residual resource

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