International Scientific Journal
Published by The V.A.Biely Institute of Mechanics of Metal-Polymer Systems, Gomel, Belarus
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FRICTION AND WEAR (Trenie i Iznos) International Scientific Journal Published by The V.A.Biely Institute of Mechanics of Metal-Polymer Systems, Gomel, Belarus |
Summary: The notions of friction forces at rest and traction, the reasons of their appearance and difference are discussed and compared, the factors they are affected by are analyzed. The author proposes the corrected terms and definitions and recommends some measures for improving traction characteristics of the rolling stock.
Chernous D.A., Anfinogenov S.B.
A computation method of the moment of resistance to rolling. pp. 238--242
Summary: A mathematical model is proposed for the driving wheel rolling over a non-deformable horizontal surface at a constant displacement velocity of mass centers. The wheel presents a rigid disc with a deformable viscoelastic coating without any adhesive bonds between the disc and coating. The deformed layer thickness is assumed to be negligibly small for the contact problem to use Winkler's hypothesis. Viscoelastic behavior of the coating material can be described within the frames of the developed model by a relaxation kernel. Based on the model, the dependencies of both out-of-plane shift of the wheel's mass center and the resistance moment to rolling vs. vertical load on the wheel and velocity of mass center motion have been computed. The resistance moment to rolling has been found for a wheel with a deformable rubber coating whose rheonomic properties can be described by Rzhanitsyn's relaxation kernel.
Zadorozhny A. I., Yelmanov I. M., Dovbnya A. V.
An asymptotic analysis of Eyring's model of viscoelastic state of a liquid lubricant in contact with absolutely solid bodies. pp. 243--248
Summary: A contact problem for determining tangential stresses in a thin layer of a liquid lubricating material (LLM) between non-deformed surfaces is solved for the case when the separating medium features the properties of the elastic body. In such conditions, Maxwell's differential relation for a viscoelastic body appears insufficient to describe the state of LLM. It's proposed to use the rheological Maxwell's relation for the equations of a continuous medium displacement in a thin layer. To construct the dominant term of asymptotic expansion of the solved nonlinear equation, Lomov's method of regularizing singular perturbations has been used. The results of the direct numerical computation showed good agreement with those obtained by the asymptotic formula.
Safonov B.P., Begova A.V.
Prediction of tribojoint life at synthesizing technical devices. pp. 249--254
Summary: A technical approach to evaluation of steel resistance to wearing based on mechanical properties of metals is proposed. The approach serves as a basis for estimating durability of tribojoints characterized by a constant or close to it wear rate of the elements.
Balakin V.A.
High velocity friction over a rocket track. pp. 255--260
Summary: High velocity friction processes are considered in conditions of frictional braking of the test objects and in conditions of a four-stage acceleration of a monorail carriage.
Chichinadze A. V., Braun E. D. †, Kozhemyakina V. D., Sverchkov Yu. G., Bakin A. I., Suvorov A. V., Kokonin S. S.
The theory of heat dynamics and simulation of solids friction and wear as applied to designing airborne brakes. pp. 261--268
Summary: A complex procedure for estimating service characteristics of heavy-loaded aviation wheel brakes at the stage of designing is set forth. It makes use of a series of the heat dynamics equations of friction and wear for transitional friction regimes during airplane braking when landing.
Dubravin A.M., Komkov O.Yu., Myshkin N.K.
Local tribometry involving scanning probe microscopy. pp. 269--278
Summary: The software/hardware description for cyclic testing of thin coatings using a scanning probe microscope is presented. Tribological properties of thin coats used in MEMS techniques are subjected to comparative analysis. The effect of temperature and other factors on friction and adhesion forces is described.
Bolotov A.N., Novikov V.V., Novikova O.O.
Operability analysis of tribojoints based on diamond-containing ceramic materials. pp. 279--284
Summary: A technology for manufacturing two types of diamond-containing ceramic materials has been developed, namely an antifrictional structural material for sliding friction joints and a tool one for abrasive working. The tribological tests have proved high enough service characteristics of the materials.
Osiko V. V., Alisin V. V., Vishnyakova M. A., Ignatieva Z. V., Lomonova E. E., Pavlov V. G.
Investigation of tribological properties of zirconium dioxide-based nanocrystalline materials of a new generation. pp. 285--289
Summary: Based on experimental studies the basic tribological dependencies have been obtained for the nanocrystalline material consisting of ZrO2 stabilized by Y2O3. The results of X-ray structural and electron-microscopic analysis of friction surfaces permit to assume the wear mechanism of friction surfaces of zirconia crystals. Generalized dependencies of the wear rate and friction coefficient of the crystals [ZrO2 + 3.5 mol% Y2O] are shown.
Lobova T.A. and Marchenko E.A.
Use of new class of self-lubricating materials to provide reliability of friction units of space vehicles. pp. 290--294
Summary: Investigation results are presented of solid lubricant coats of molybdenum diselenide produced by thermochemical treatment of molybdenum in selenium pairs. The interrelation between their properties and structure is shown. The coatings are characterized by stable tribological characteristics under various operation conditions (stop-start regime, in air and vacuum). The examples of their usage in friction joints of space vehicles are cited.
Basinyuk V. L., Kolomeichenko A. V., Mardosevich E. I., Titov N. V.
Heat load on the friction contact of aluminum parts coated by Al2O3. pp. 295--303
Summary: Experimental results of K-factor and specific heat of Al2O3 coatings formed by anodic-cathodic microarc treatment on aluminum alloy specimens and methodic recommendations for heat load estimation on analogous systems are presented.
Migranov M.Sh. and Shuster L.Sh.
A study of wear resistance of cutting tools with multi-layered coatings. pp. 304--307
Summary: The load-temperature conditions and wear resistance of cutting tools with multilayered coatings are studied experimentally for turning and milling processes of various materials within a broad range of machining conditions.
Tsuan Ya.
Frictional properties of multilayered and titanium-carbon-based composite coatings. pp. 308--314
Summary: Plasma-sprayed titanium-carbon based coatings with a multilayered and composite structures were subjected to a comparative analysis. The coatings appear to have essential differences in frictional and mechanical characteristics. The multilayered structure show better antifrictional, elastic and wear-resistant properties as opposed to the composite one. Using AFM it was proved that the cluster-projections of the droplet phase were more uniformly distributed over the multilayered coating. AFM nanoindentation functions display a diminishing elasticity modulus for both coatings under cyclic loading. Auger spectroscopy of the chemical composition visualizes high titanium carbide content in the composite coating leading to its more intensive graphitizing. Hybridization of carbon sp3/sp2 was studied by Ramon spectroscopy. Diamond-like structure turn to play significant part in the multilayered coating, which is seen in higher elasticity modulus and wear resistance.
Krasnov A.P., Timofeev V.A., Afonichev O.V., Volkov I.O., Chukalovsky PA, Bychkov R.A., Kuznetsov V.V., Buyaev D.I.
Tribo-chemical transformations on friction surfaces of organic plastics of phenol formaldehyde binders. pp. 315--320
Summary: The authors consider the effect of chemical structure of phenol formaldehyde binders forming a densely packed polymer network during setting upon tribological properties of the polymer composite material reinforced by polyoxadiazole fibers.
Burya A. I., Kozlov G. V.
Wear mechanisms of phenylone-based carbon plastics. Structural interpretation. pp. 321--324
Summary: The wear behavior of phenylone-based carbon plastics is shown to depend on their structural condition in the friction contact area. In turn, the structure of carbon plastics characterized by fractal dimensionality is a function of temperature rise in the contact. The proposed structural approach visualizes a quantitative relationship of named factors.
Verenich I.A., Stanyuk E.I., Tini M.A.
Study of wear-preventive properties of TM-3-9BR transmission oil. pp. 325--331
Summary: The work presents comparative test results of antiwear properties of transmission oil (SAE 75 API GL-3) based on the rapeseed oil and mineral transmission oils like HESSOL Fluid Getriebeoil ATF and THK-Texaco" Geartex EP-A used in blade throttle-loaded pumps. The tests have revealed antiwear characteristics of TM-3-9BR oil to be on a par with those of HESSOL and THK. TM-3-9BR oil is biodegradable and friendly to the environment. It can be used in reducers and transmissions with elevated requirements to environmental protection from oil leaks.
Potekha A.V., Potekha V.L.
A new design of a wear tribomonitoring device for precise friction joints with account of dilatation. pp. 332--337
Summary: The advantages and disadvantages of PCLW-01 tribodilatometer are analyzed proceeding from its long-term operation results. A modification PCLW-02 of the tribodilatometer is considered, which is distinguished by improved reliability and serviceability. Its technical characteristics and comparative test results are presented for adoption of tribodilatometric approaches in deciding various problems of tribological materials science.
Boris I. Kupchinov (to 70th anniversary). pp. 340--341
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CONFERENCE CALENDAR. p.342
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