Èçäàòåëü: Èíñòèòóò ìåõàíèêè ìåòàëëîïîëèìåðíûõ ñèñòåì èì. Â.À. Áåëîãî Íàöèîíàëüíîé àêàäåìèè íàóê Áåëàðóñè, Ãîìåëü, Áåëàðóñü
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ÌÀÒÅÐÈÀËÛ. ÒÅÕÍÎËÎÃÈÈ. ÈÍÑÒÐÓÌÅÍÒÛ Èçäàòåëü: Èíñòèòóò ìåõàíèêè ìåòàëëîïîëèìåðíûõ ñèñòåì èì. Â.À. Áåëîãî Íàöèîíàëüíîé àêàäåìèè íàóê Áåëàðóñè, Ãîìåëü, Áåëàðóñü |
Summary: The approach based on the Ritz method defining an optimal dimensions of plate on elastic foundation is presented in paper.
Vereshchagin M. N, Pozharkov S. P.
Features of elastic-plastic compression of a thin strip in process twin-roll casting melt. pp. 8--12
Summary: The analysis of influencing of different technology factors on a stress distribution and strains on section of a belt is introduced at two-roll quenching of a melt. The principled difference of process of rolling of peel of metal is rotined at rapid quenching of a melt from customary hot rolling.
Karpushko A. V., Fedoseev G. N.
The stress in a transversal-isotropic spherical stamp. pp. 13--16
Summary: The effective introduction of progressive methods of sheet punching in a small lot manufacture of machine-building production requires of stamp metal details replacement by the details made from cheaper composite materials. In the paper a definition of displacements. deformations and stress in the homogeneous transversal-isotropic spherical stamp from a similar composite material during it axially symmetric deformation is considered. The analysis of the stressed state in the stamp is given. On its basis the reasonable choice of the cheapest composite material of a stamp with the minimal necessary strength characteristics becomes possible.
Starovoytov E. I., Senko V. I., Yarovaya A. V.
Vibration round sandwich viscoelastic plat in neutron flow. pp. 17--20
Summary: Considered fluctuations an sandwich an viscoelastic plate in the neutron flow. Analylical decision of problem received by means of the method of averaging in dynamic problems single-line viscoelaxtic. Used by hypothesis resemblance kernels relaxation of material grains. Numerically explored logarithmic decrement of fluctuations.
Chernous D. A., Konyok D. A.
Elasto-plastic deformation of cellular solid (2D model). pp. 21--24
Summary: For the analysis of that model method of allocation of the unit cell element is used. Equations of the theory of small elasto-plastic deformations which take into account influence of longitudinal and cross-sectional forces on the plasticity zones forming are used for description of the separate rod deformation of given element. The offered technique allows to investigate e(s) Curves for modelling material and also to determine the elasticity limit and the character of hardening of material.
Shilovich A. V., Sementovski A. V., Vorojun I. A.
Mathematical model for dynamic research of elements of strengthening of pipes on a railway platform at impacts of coaches. pp. 25--28
Summary: The method of mathematical modeling investigates influence of a preliminary tension of resilient elements of strengthening of pipes on a railway platform on magnitude of longitudinal transition of pipes at impacts of coaches. Is establislied that the preliminary tension of resilient elements of cross tie strengthening allows to reduce both longitudinal transition of pipes, and force in elements of longitudinal strengthening
Summary: The statistical model, predicting exit of defective production with an exactitude 95.02% is submitted during continuous single-stage production of a spun glass taking into account major factors: a thermal mode of a glass furnace, pressure, submission of fusion mixture, the contents of a reglass. The technique of automated management by glassmelting process is offered with the purpose of decrease of spoilage. The conformity to a obtained model with substantial physical sense is checked.
Bryker M. A., Abaev G. N.
Thermal balance the compressor for the schemes the heat pumps. pp. 34--36
Summary: The thermal balance of the plate-like compressor is considered and on it to a basis the system of the mathematical equations permitting to discover the polytropic exponent n and other parameters immediately from thermal balance of the compressor is constructed instead of from thermodynamic relations, that it is important to use at a research of work and performances of compressors, and as at creation and process of scaling of the schemes with heat pumps.
Prushak V. Ya., Scherba V. Ya., Tukhto A. A., Andreiko S. S.
Analysis of forecasting and prevention methods of gas-dynamic phenomena in potassium mines. pp. 37--41
Summary: Regional local and current methods of forecasting gas-dynamic phenomena in potassium mines are analyzed. Known technological methods of preventing gas-dynamic phenomena are considered and probability of their use at Starobinsk deposit mines are analyzed.
Summary: The results of developing and application in mechanical engineering of silicate polymer materials are generalized. A classification is proposed of silicate polymers proceeding from their structure and formation features.
Kozlov G. V., Burya A. I., Kholodilov O. V.
The electrical conductivity of polyhydroxiether filled with graphite: fractal and percolation characteristics. pp. 50--53
Summary: The electrical conductivity of polymerization-filled and produced by mechanical blending composites polyhydroxiether-graphite is studied. In terms of fractal analysis and percolation theory the difference of the percolation threshold values of these materials is explained. A determined with independent methods percolation and fractal characteristics are consistent with each other.
Kudryavtsev I. A., Bogdanov V. P., Prasol A. V.
The research of reinforcement electrochemical corrosion under the local effect of agressive mediums on ferrum concret constructions. pp. 54--57
Summary: It was shown the posibility of macrocorrosion pairs formation under local influelence of agressive medium on ferroconcret constructions. It was quantiatively estimated concrete spesific resistance influence on reinforsement stationary potentials and ohmic resistance on anodic and catodic processes on which macropairs corrosion currents depend on.
Rusetsky V. V., Laizerenok M. E., Pasko V. B., Dolinskaya R. M., Migal S. S., Shcherbina E. I.
Operating ability of elastomer materials. pp. 58--61
Summary: The objects of investigation is elastomeric compositions on the basis of rubber with various structures of the molecular line The behaviour of the influence of thermal aging in the air, agresical phase on the physical-mechanical properties of the rubber
Sizova O. V., Kolubaev A. V.
Structural features and mechanical properties boride coatings. pp. 62--68
Summary: The structural researches, strength properties and wear resistance of boride coatings on constructional steels 15N3MA and 14ChN3MA are presented. The correlation between structure, phase composition and nature of fracture boride layers is established at loading.
Fedorov V. D.
Mechanical and dynamic properties of PC-PDMS copolymer and quantum states of blocks. pp. 69--73
Summary: Results are cited of investigating mechanical and dynamic properties of PC-PDMS copolymer by the method of method of torsion oscillations. Quantum state of segmental mobility of blocks and their molecular interaction have been analyzed. The phenomenon of hybridization of transfers determining elastomeric properties of the copolymer has been studied in a wide temperature range
Summary: Using X-ray analysis methods the effect of deposition process parameters on the phase compositions, lattice parameters, microstresses levels, crystallographics textures and residual stresses levels in ion-plasma-plated titanium coatings deposited from directed and separated plasma flows onto steel substrate were studied.
Lin D. G., Sedlyarova S. N.
The effect of sulphurization substrate on adhesion of nitrile rubber to metals. pp. 81--85
Summary: It is established, that irrespective of a way of sulphurization of a brass substrate (by processing a substrate in a sulphur emulsion before formation of adhesive contact to rubber or sulphurization of substrate directly at a stage of contact sulfuric vulcanizates with a brass) it is reached about the identical level AS considerably exceeding AS in connections of elastomers with copper or zinc. The experimental results which support the cohesional nature of failure in rubber/brass joints alorg the sulphide film are presented in this paper.
Mironov V. S., Landychenko V. S., Yurkevich O. P., Park M., Kim J.
Effect of triboactivation on characteristics of biodegradable polymer composites. pp. 86--91
Summary: Effect of triboactivation on interaction of dispersed components and strength of highly-filled biodegradable polymer composites based on polybutylene succinate, wood sawdust and diacetate cellulose has been studied. It is shown that triboactivation leads to electrification, increases action radius of surface forces and decreases surface acidity of both polymer binder and filler particles. It is found that contact angle for "molten polymer-filler" system is reduced however the strength of fabricated composites changes ambiguously. Explanation of observed effects has been suggested.
Kovalevskii A. A., Tsybulskii V. V., Sorokin V. M.
Research of profiles of contact windows in a dioxide of silicon, generated through a mask in of a photoresist process isotropic-anisotropic plasmachemical of etching. pp. 92--97
Summary: The problems arising with isotropic-anisotropic plasmachemical etching out of contact windows in dioxide of silicon with use as mask with etching photoresist films are discussed. Is shown, that a temperature of hardness of photoresist films plays a determining role with formation of the profiles of contact window. A film the photoresist of, as the masks, more only are inclined to a destruction in a mode anisotropic plasmachemical of etching owing to an ion of bombardment having a place in this mode of etching.
Mammedov A. T., Mammedov V. A., Aliyev A. G.
New tendencies in fabrication of cold pressed powder materials. pp. 98--101
Summary: The new methods in fabrication of powder metallurgy parts via cold pressing-sintering technology were reviewed; their advantages and disadvantages were studied. The pressing process with the use of porous die was considered as progressive method of fabrication of high-density parts. The offered technological method allows Obtaining a maximum gas flow from the part during pressing and exclusion of added lubricants, which eventually leads to considerable improvements in mechanical properties of sintered.
Markevich M. I., Piskunov F. A., Podol'tsev A. S.
Laser-induced processes in the thin metal. pp. 102--106
Summary: The article describes processes take place in the thin metal films at ipulsing laser influence.