Ìåæäóíàðîäíûé íàó÷íûé æóðíàë
Èçäàòåëü: Èíñòèòóò ìåõàíèêè ìåòàëëîïîëèìåðíûõ ñèñòåì èì. Â.À. Áåëîãî ÍÀÍ Áåëàðóñè, Ãîìåëü, Áåëàðóñü
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ÒÐÅÍÈÅ È ÈÇÍÎÑ Ìåæäóíàðîäíûé íàó÷íûé æóðíàë Èçäàòåëü: Èíñòèòóò ìåõàíèêè ìåòàëëîïîëèìåðíûõ ñèñòåì èì. Â.À. Áåëîãî ÍÀÍ Áåëàðóñè, Ãîìåëü, Áåëàðóñü |
Summary: The present paper reviews the investigations conducted by V. A. Belyi and his followers. An attempt was made to generalized the obtained results and establish the tendency for a development of his scientific school.
Zakharov S. M.
Problems of computer tribology. pp. 237--242
Summary: A brief review of the domains in which integration of information technologies and tribological knowledge promotes the effectiveness of solution of tribological problems and application in engineering.
Pinchuk L. S.
Problems of studies of materials of contact seals. pp. 243--251
Summary: The problem of tightness has become one of the most essential in machine building. The article deals with the structure of contact seals as a major means of making machine parts tight. Specifically it deals with a variety of functions of a sealing body as the main component of contact seals and a sealing material from which they can be made. Designs of seals are shown in which other components of seals act as a sealing body, including gaye media. The parameters of contacts between a solid and a deformation model of the seal are analyzed as a structurally non-homogenous body with the tensor field of the moduli of elasticity. Implementation of the model in polymeric sealing materials for contact seals is exemplified. Ways are shown how to improve sealing materials and metals in order to make them behave more as "intelligent" materials.
Drozdov Yu. N.
Prediction of wear with the allowance for mechanical, chemophysical and geometrical factors. pp. 252--257
Summary: Chemophysical and mechanical processes evolving in the contact govern wear of solids. It is also strongly affected by the kinematics of motion (sliding, rolling, rolling with slippage, spinning, etc.), the structure and composition of surface and subsurface layers of materials, the condition of the lubricating layer, appearance of surface compounds, geometrical characteristics of contacting surfaces and their changes in time. The method of deriving design dependencies for the wear rate is based on the synthesis of experimental data and mathematical models. The advanced theoretical invariant method of calculating the rate of surface failure of solids in friction is cased on the equations of the elastohydrodynamic theory of lubrication, chemical kinetics, the contact problem of the theory of elasticity, the theories of strength, analysis of the thermophysical, adsorptive and difiusive processes. The heuristic role of the physically informative tribological invariants is demonstrated.
Balakin V. A., SergienkoV. P., Lysenok Yu. V.
Temperature problems of friction. pp. 258--267
Summary: A review of theoretical studies of analytical solutions of the temperature problems of friction and thermal designing of brakes.
Belyi A.V., Kukareko V. A., Sharkeev Yu. P., Panin S. V., Legostaeva E. V.
The surface engineering and triboengineering features of 40X steel implanted with nitrogen ions. pp. 268--280
Summary: The results of studies of the structure, phase composition, triboengineering features and mechanics of plastic deformation during friction on 40X steel implanted with nitrogen ions under various conditions. It is shown that steel prehardening intensifies diffusive transfer of the modifying impurity into the subsurface layers at implantation temperatures 620--670 K. The utmost wear resistance of the modified steel during adhesive wear is achieved after its treatment at 670--720 K at the stages when high-nitrogen nitride e-phases appear. When the modified layer releases low-nitrogen nitride particles g'-Fe4N the adhesive resistance of the layer declines. A model is proposed explaining the lower wear resistance of these layers because of the disassociation of g'-Fe4N in the spots of heat flashes. When a sufficiently thick hardened layer appears on the surface it suppresses the rotary pattern of evolution of plastic deformation in subsurface layers, thus the wear rate is strongly reduced.
Bogdanovich P. N., Baidak A. A.
Pre-displacement in metal-polymer friction pairs. pp. 281--285
Summary: The phenomenon of pre-displacement during friction contact between a cylindrical steel counterbody and a rectangular epoxy polymer specimen is analyzed. The regularities with which the microgeometry of the counterbody's surface and mechanical features of the polymer affect the displacement in the direction of a tangent force are discussed. It is shown that correlation exists between the pre-displacement and the static friction coefficient.
Bushe N. A., Goryacheva I. G., Makhovskaya Yu. Yu.
The effect of the phase composition of antifriction aluminium alloys on their self-lubrication in friction. pp. 286--295
Summary: A model is advanced of separation of the soft phase on the surface of an antifriction self-lubricating alloy. This model has served to investigate the dependence of the quantity of a solid lubricating material appearing on the alloy's surface on the basic characteristics of the components of the alloy (the yield limit of the hard and soft phases of the alloy, the sizes of inclusions and the spacing between them). Two aluminium antifriction alloys AOIOC2 and A020-1 have been compared. The results of the studies have served to advance recommendations about the development of new alloys with better wear and scoring resistance.
Burya A. I., Dudin V. Yu., Burya A. A. †, Kholodilov O. V.
Friction and wear of the aromatic polyamide filled with thermally disintegrated graphite. pp. 296--299
Summary: Results of studies of the relation between the triboengineering characteristics of the graphitoplast based on phenylon C-2 and graphite concentration show that the material has the best combination of properties when it contains 15% by mass of the thermally disintegrated graphite.
Dzhanakhmedov A. Kh.
Mechanics of cone surface of friction of production tree valves. pp. 300--303
Summary: Relations are derived allowing to characterize the causes and conditions of wedging of cone plugs in the body of a shut-offvalve. Recommendations are shown to prevent and eliminate wedging.
Kireenko O. F., Ginzburg B. M., Bulatov V. P.
The effect of fullerens on the tribolopgical chanracteristics of plastic greases. pp. 304--309
Summary: Tests of steel-on-steel friction couples in different types of tribocontacts and within a broad loading range have shown that it is possible to improve the tribological characteristics (wear and scoring resistance, specifically) of plastic greases, such as solid oil I-40A and lithol-24 after introduction of fulleren black or fulleren C60 in the amount 5% by mass. Additive of fulleren black or fulleren C60 yield practically equivalent results.
Kupchinov B. I., Ermakov S. F., Rodnenkov V. G., Beloenko E. D., Eysmont E. S.
Some results of studies of the liquid crystalline condition of the synovial lubricating fluid in joints. pp. 310--317
Summary: Results of experimental studies of the abnormally low friction of natural joints are discussed. Methods of physical, chemical analyses have revealed a new feature of the synovial fluid in joints showing that it is capable to retain liquid crystalline cholesterol compounds. These compounds in the zone of friction of the joint cartilage produce a liquid crystalline nematic phase within the range of physiological temperatures. Tribological tests of natural and pseudosynovial fluids have revealed that low friction of the contacting cartilages is due to the liquid crystalline phase in the synovia.
Meshkov V. V., Sviridenok A. I.
Stress-strain state and wear of the piston from a polymeric composite: the effect of adhesion of components. pp. 318--323
Summary: By modeling the stress-strain state of the piston from a polymeric composite sliding in a metallic sleeve with the help of the numerical method in its thermoelastoplastics formulation it has been revealed that a faster final speed of the piston after acceleration leads to a strong rise in the magnitude of stresses and appearance of the regions of their concentration in the surface layers of the piston. Adjustment of the interphase interactions between components accompanied by the adequate change in their adhesive strength transforms the regions of stresses and deformation in the material of the piston. It is shown that any rise of the adhesive strength in the fiber-matrix compounds strongly reduces normal and tangential stresses and wear of the surface layer of the piston.
Pogosyan A. K., Oganesyan K. V., Isadzhanyan A. R.
Polymer-based composite materials with mineral fillers. pp. 324--328
Summary: Results of studies of composite self-lubricating polymeric materials with mineral fillers show how their types, the quantities and particle sizes influence the triboengineering and process behavior of the composites. It is shown that development of new wear resistant antifriction materials for friction without any lubricating material relates to the practical implementation of the phenomenon of friction transfer in the metal-polymer tribosystem.
Struk V. A., Kravchenko V. I., Kostyukovich G. A., Skaskevich A. A.
Composite polymeric coatings for reconditioning friction units of machines and process equipment. pp. 329--333
Summary: Some features of producing composite coatings based on aliphatic polyamides are discussed together with their performance characteristics and how they improve the wear resistance of friction units of machines and process equipment. The effect of modifying additives with nanometric dispersion on the structure, adhesive and triboengineering characteristics of coatings produced by deposition from a pseudoliquified layer and low temperature sputtering, has been studied. The effectiveness of application of powder materials produced by cryogenic dispersion of granules PA6 is demonstrated versus the imported counterparts PA11 (Rilsan, ELF ATOCHEM). The coatings boost wear resistance of friction units 3--5 times without delivering any lubricating material or with limited lubrication. The can be used in the automobile units when they are manufactured or repaired.
Chichinadze A. V., Buyanovskii I. A., Gurskii B. E.
The diagram of transitions and the screening effect of the lubricating layer. pp. 334--341
Summary: The diagram of transitions for lubricated concentrated sliding steel contacts advanced by Begelinger and De Gy implies two possible ways from partial elastohydrodynamic lubricate to the mode of seizure. A three-stage model of seizure during boundary lubricate and the screening effect of the lubricating film when calculating the temperature of the tribological contact are proposed to explain this diagram.
Shilko S. V.
The role of friction in mechanical tests of materials. pp. 342--347
Summary: It is discussed how friction affects the magnitude of experimentally determined mechanical characteristics of materials. The stress-strain condition of specimens is analyzed with the account of friction and slippage when a test load is applied during static tension-compression.
ÊÀËÅÍÄÀÐÜ ÊÎÍÔÅÐÅÍÖÈÉ. p. 352