Трение и износ, 2004, Vol.25, No.5
/ Издания академии / Научные журналы
Трение и износ, 2004, Vol.25, No.5
Том 25, номер 5; сентябрь-октябрь, 2004
СОДЕРЖАНИЕ
СТАТЬИ
Alexandrov V. M., and Gubareva E. A.
Consideration of nonlinear friction, wear and heat generation in non-ideal heat contacts for the problem on interacting solid and coating. pp. 455--460.
Summary: To embrace more phenomena in the contact region, the contact scheme between solids and soft coatings has been simplified at most. A formula for the nonlinear friction is proposed to describe wearing of coatings under the friction-induced heat generation in conditions of a nonideal contact. In addition, a formula to describe the relation of thermal resistance vs pressure in the contact is presented. The authors have determined life of a tribojoint, conditions of thermal and force stability of the coating wearing and those at which catastrophic wear can be avoided.
Kropotin O. V., Mashkov Y. K., and Pivovarov V. P.
Elaboration and analysis of SSS in sealing members of tribosystems by the finite element method. pp. 461--465.
Summary: Analytical results of the stress-strain state of the sealing and force elements of radial sealing devices are considered using the finite element method. Usage of the finite-element models and the analysis of stress and strain dependencies on mechanical properties and operation conditions served the base for developing more reliable sealing devices with account of physico-mechanical properties of materials.
Gadzhiev G. H., and Mirsalimov V. M.
Optimum design of jointed cylinder--ram pairs. pp. 466--473.
Summary: Based on the friction model of a rough surface, tightness of the jointed cylinder and microgeometry of the friction surface have been theoretically analyzed and determined to eliminate initial wear.
Balakin V. A., Sergienko V. P., and Lysenok Y. V.
Optimizing of air-cooled automotive brake designs. pp. 474--480.
Summary: The means of perfecting structures of car brakes with air-cooled discs are discussed in terms of analyzing operating heat regimes.
Barabanshchikov Y. G.
Electrical phenomena in friction of dispersed systems. Part 3. Triboion emission. pp. 481--485.
Summary: Based on the results of experimental studies and the analysis of possible causes of electrization of dispersed systems (DS) during friction a hypothesis is advanced explaining this process by emission of cations from the counterbody metal due to a drop of the potential energy of ions in a structurally ordered boundary layer and a rise of the kinetic energy of cations in the metallic lattice as a result of collisions with atoms of the dispersed phase.
Ermakov S. F., Beloenko E. D., and Eismont O. L.
The role of liquid crystals in tribome-chanical properties of joint cartilages. pp. 486--491.
Summary: Investigation results are presented of the frictional interaction in joint cartilages in the presence of synovia and lubricants with or without additions of liquid crystalline fluids. Based on experimental evidences, structural, mechanical and antifrictional properties of the joint synovia are correlated. Taking into account structural regularity of the surface layers and deformation properties of the cartilages it can be stated that the results obtained speak in favor of earlier discussed supposition on the effect of liquid-crystalline compounds on low friction in joints.
Basinyuk V. L.
Spectra of oscillations of the lubricating film thickness, vibroaccelerations and noise of spur gearings. pp. 492--503.
Summary: Investigation results of the spectra of oscillations in the lubricating film thickness of gearings, their viboraccelerations and noise are cited. The spectra visualize the forced torsion and radial oscillations induced by the kinematic errors and periodic changes in the engagement phase stiffness during operation. The spectra also display the natural radial and torsion oscillations excited in the mechanical system during edge and media] impacts occurring at reengagements of the teeth. Differences and convergence of these spectra are shown and their usage in vibroacoustic monitoring in manufacture and assembly of the gearings, as well as estimation of their technological state at testing and operation.
Burya A. I., Peleshenko B. I., and Derkach A. D.
Calculation of loads and pressures in the contact zone of the "eyelet--pin" tribosystem of the grain harvester cutter. pp. 504--511.
Summary: The results of calculations of loading variations in the movable "eyelet--pin" pair of the cutter screw are presented. It is shown that the calculated loads are quite tolerable for the eyelets that are made of PA-6 - based carbon plastics. Full-scale tests of experimental parts have demonstrated that they can be used in the design of the "Stavutich" KZS-9-1 grain harvester.
Shilko V. K.
Use of the friction of relative rest in cutting mechanisms of belt sawing machines. pp. 512--518.
Summary: The peculiarities of transmission of the principal motion by friction are considered for the belt saws used in cutting mechanisms of the belt-sawing machines. New assembly schemes are presented of the cutting mechanisms of the belt-sawing machines based on the long-term friction contacts of relative rest on the example of the transmissions of the pulley-flexible working member-belt saw type. The latter type is compared to the transmissions like pulley-belt saw. Analytical dependencies are presented to interrelate the friction forces of relative rest aimed at designing cutting mechanism parameters of the belt-sawing machines.
Pleskachevsky Y. M., Mikhailov M. I., and Shabakaeva Z. Y.
The efficiency of collapsible cutters with a composite coating of polyhedral blades. pp. 519--522.
Summary: A composite coating has been developed on the base of epoxyethereal resins. The cutters with the composite coatings turned to be more wear resistant than batch-produced ones without the coating. Wear resistance of the collapsible cutters with the composite coating on the basic faces of the hardalloyed blades has been studied.
Tsuan Y., Chzhik S. A., Popov A. N., and Korotkevich S. V.
Frictional characteristics of multilayered composite titanium-diamond-like coatings. pp. 523--530.
Summary: Triboengineering properties of periodical multilayered titanium-carbon (diamond-like) coatings (DLC) have been studied as a function of thickness of intermediate titanium lasers and number of the layers. It has been found out that with increasing number of the layers from 12 till 20 the friction coefficient augments from 0.19 up to 0.35 under a 3 N load and 3-10-3 m/s sliding velocity. As thickness of the titanium layers enlarges from 25 till 50 nm, the friction coefficient diminishes from 0.30 down to 0.19. Friction and wear of the counterbody in the system with the composite coating is conditioned by two main factors, namely, formation of the layers with low friction due to graphitization of the diamond-like structures, and the presence of separate stiff projections of the droplet nature on the DLC. Triboengineering properties of the coatings are shown to depend upon thickness and correlation of Ti-DLC layers.
Bogdanovich S. P., and Pesetsky S. S.
The metal counterbody effect on triboengineering properties of compatibilized polyamide 6-polyethylene blend: mass transfer analysis. pp. 531--538.
Summary: Frictional and wear behavior of the compatibilized polyamide 6 -- high density polyethylene blend has been studied in contact with steel, copper, titanium and aluminum alloys. Mutual transfer has been observed of both counterbody and polymer materials, where an essential contribution makes not only the transfer layer formed by the polymer material on the metal surface but also by the metal particles transferred on the polymer. It's noted that metal particles may exert an abrasive effect on the counterbody and intensify wear rate by as much as a few orders of magnitude. The effect of the metal counterbody nature on mass transfer and triboengineering properties are discussed.
Stukach A.V., Kireenko O.F., and Fadin Y.A.
Interrelation between tribological and thermal characteristics of filled polyamide. pp. 539--541.
Summary: Experimental data are presented showing the effect of heat capacity and heat conductivity of fillers on the pv-factor and other tri-bological properties of polyamide-based composites.
Ovchinnikov E.V.
Triboengineering characteristics of mechanical-rubber goods modified by fluorine-containing oligomers. pp. 542--547.
Summary: Structures of thin films of fluorine-containing oligomers deposited on mechanical-rubber articles have been investigated. The effect of energy was found to result in formation of the quasi-crystalline structures. Triboengineering properties of the rubbers modified by fluorine-containing oligomers have been studied.
Zaitsev A. L., and Osipov V. A.
Investigation of frictional properties of carbide-filled phenolic composites in contact with granite. pp. 548--552.
Summary: The work presents the results of studying frictional properties of phenolic composites filled by carbides of tungsten, titanium and silicone at friction against natural rock in aqua media. Frictional properties are shown to depend considerably on the type of the abrasive filler used. Quick adhesive setting and loss of its abrasiveness in aqua medium condition the low abrasive effect of silicone carbide on granite in spite of its high hardness. The best wear resistance is shown by phenolic composites filled by tungsten carbide.
Zozulya V. D.
Improvement of self-lubrication of powder bronze bearings by sintering. pp. 553--556.
Summary: Publications in the field of manufacturing bronze powder plain bearings by technological burning followed by impregnation with mineral oil, and intended for operation at self-lubrication regimes are analyzed. The achieved porous microstructure is said to have improved resistance to polishing by the friction forces, and enlarged lifespan under self-lubricating regimes. The chief triboengineering characteristics of the bearings with steel axles at boundary lubrication are enumerated.
Zlotnikov I.I., Seltsky S.F., Solovei N.F., Kozlov A.B., and Petrashenko P.D.
Study of lubricity of organic and inorganic polymer solutions. pp. 557--560.
Summary: The effect of concentration and composition of aqua solutions of organic and inorganic polymers (oligomers and monomers on their lubricity has been analyzed. The objects of the study were the polyvinyl alcohol, acryloamide copolymer with ammonium acrylate and alkaline metals, phenol formaldehyde resin, e-caprolactam and sodium silicate. Prospects of using considered polymers in new types
НЕКРОЛОГИ
Victor M. Vlasov. p. 561
КАЛЕНДАРЬ КОНФЕРЕНЦИЙ. p. 562
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Designed and maintained by Dr. Nikolai N. Kostyukovich. Last updated: April 5, 2005
Created with assistance of Dr. Ignatii I. Korsak
Copyright © 2004, 2005 The National Academy of Sciences of Belarus
Copyright © 2004 The V.A.Biely Institute of Mechanics of Metal-Polymer Systems
