Трение и износ, 2005, Vol.26, No.2
/ Издания академии / Научные журналы
Трение и износ, 2005, Vol.26, No.2
Том 26, номер 2; март-апрель, 2005
СОДЕРЖАНИЕ
СТАТЬИ
Krasnyuk P.P.
Planar contact problem of interaction between an inclined rectangular die and elastic layer during stationary friction heat generation. pp. 117--127
Summary: The paper deals with the problem of verification of the classic formulation of the planar problem of interaction between the inclined rectangular die and the elastic base. It is shown that the calculated displacements of the contact surface of an elastic body in classic boundary friction formulation are not conjugated with the shape of the die surface (an effect occurs when the base material penetrates into the die) demanding a change on contact conditions. A solution for a plane-based die lies in the logarithmic feature of the function of contact stresses in the point of breaking tangent to the profile within the range of interaction between bodies in addition to the classic root feature of contact stresses over the edges of the contact region. It is shown by the study of friction heat generation and how it affects thee mechanism of contact interaction between the inclined die and the base that verification of the boundary conditions makes significant corrections in distribution of contact stresses in interaction under pressure or in contact with a low intensity of heat generation. If heat generation intensifies the die smoothes out and, if pressure is applied with eccentricity displace the body in the direction of pressure application.
Zaspa Yu. P.
Resonance characteristics of nominally stationary friction joints under inertia vibroloading. pp. 128--140
Summary: The amplitude-frequency characteristics (AFC) of induced inertia vibration of the components of nominally stationary friction joints in a single mechanical unit have been measured experimentally. A relation between the obtained amplitude-frequency characteristics and the resonance properties of a unit is discussed as a multicomponental dynamic system. The pattern of contact interaction between the components of a friction unit has been studied under quasistatic and dynamic tangential loading. The effective parameters of such interaction have been determined and they are applicable to calculate the frequency of contact resonance in vibration. Features of a friction joint as a non-linear mechanical system and ways of promoting its resistance to vibration are discussed.
Izrailovich M. Ya. and Arakcheev A. V.
Active damping of friction spontaneous oscillation by power effect. pp. 141--150
Summary: A single-mass system with spontaneous non-linearity is considered corresponding to the mechanism of excitation of friction spontaneous oscillations. To alleviate the intensity of spontaneous oscillations a power vibrodamping effect with a feedback is introduced into the system. A method is disclosed how to create a quasioptimal structure of such effects that provide singularity and stability with conditions having the minimal amplitude.
Evtushenko A., Matysjak S., and Kutsey M.
A thermal problem of friction when a coated body is braked. pp. 151--158
Summary: The non-stationary problem of heat conductivity is solved for a system layer consisting of layer applied to a massive base is solved analytically. The free surface of the composite body is heated with a heat flux having the intensity equal to the specific power of friction forces in breaking with continuous deceleration. The relations between non-stationary temperature and geometric and thermo-physical properties of components are studied.
Sergeichev A.V., Denisova N.E., and Danilov V.V.
Application of temperature flash as a criterion of selection of antifrictional materials and coatings of frictional units at the stage of designing. pp. 159--165
Summary: It is proposed to use the temperature flash on contacting surfaces as a criterion of selection of a material or a coating for a tribocouple. The problem is considered how to determine the temperature flash on the surfaces of coated tooth wheels. It is shown that coatings from materials with better thermophysical characteristics have a much lower temperature of flash.
Tkachuk D. V., Semchenko A. V., and Nikituk Yu. V.
A method of temperature measurement when modeling surface processing of gel-quartz-glass optics. pp. 166--171
Summary: A method of registering temperature fields when modeling abrasive surface processing of gel-quartz-glass optics is developed. The paper describes the principle of action and the design of an experimental installation employing the technique of optical electron scanning. The results of temperature measurements in the surface layer of a workpiece and in the contact zone in the model tool-workpiece pair arc shown.
Kovtun V. A. and Semenova T. V.
The effect of thermal condition of metal-polymeric powder composite materials during electrocontact fusion on the triboengineering characteristics and structure of fine-layer coatings. pp. 172--181
Summary: It is studied how the thermal state of metal-polymeric powder composite materials in the process of electrocontact fusion affects the triboengineering characteristics and the structure of fine-layer coatings. Calculation diagrams are plotted and models are developed simulating the process of heating and fusion of metal-polymeric powder coatings under the electric current effect. The mathematical calculation yielded the fields of distribution of temperature and heat fluxes in the region of contact interactions between the powder components when the packaging and concentration of particles of the polymeric filler in the metallic matrix are changed. The methods of mathematical modeling serve to show that introduction of a polymeric filler into the metal-polymeric powder system in a ratio 2; 5; 7 and 10 % by mass and by changing its packaging the temperature condition of the powder composite changes strongly affecting the processes of structure formation and tribological properties of fine-layer coatings.
Sayan N.I., Rogachev A.V., Popov A.N., and Kazachenko V.I.
The effect of the substrate nature and heat treatment of diamond-like coatings on their triboengineering characteristics. pp. 182--186
Summary: It is discussed how the nature of the substrate material and annealing of diamond-like coatings affect their triboengineering characteristics. It is shown that harder substrate boosts wear resistance and reduces the friction coefficient of a coating. The effect of annealing on the properties of a coating is due to evolution of graphitization and oxidation processes.
Burya A.I., Kozlov G.V., and Rula I.V.
Prediction of relation between wear of carboplas-tics and pressure and sliding velocity. pp. 187--190
Summary: A method is proposed of predicting the linear wear rate as a function of test conditions (pressure and sliding velocity). The method is based on using the structural characteristics that yield good correlation with the experiment.
Buznik V. M., Lebedev M. P., and Semenov Ya. S.
The starting period of friction pairs operating in polar conditions. pp. 191--196
Summary: The paper deals with the essentiality of the starting period at low climatic conditions when chipping strongly grows because rubbing surfaces are exposed to temperatures close or exceeding the temperature of viscobrittle transformation (cold brittleness). It is exemplied by steels extensively used in polar applications. It is proposed how to alleviate brittleness (brittle wear) by alloying with elements with longer chemical bonds or filled with np-, nd-, nf- electron shells.
Akimov V. V.
A study of triboengineering properties of TiC-based hard-alloy composite materials with TiNi as a binding phase. pp. 197--200
Summary: The triboengineering properties of new hard-alloy composite materials in friction on an abrasive are studied. It is determined that the linear pattern of kinetic dependencies enables to determine the linear wear rate of a composite material on the abrasive that depends on the size of carbide grain directly. The new hard-alloy composite materials demonstrate satisfactory results of wear resistance compared with the BK8 alloy and much better results than the TH-20 and KHT-16 alloys.
Levit M.Z., Kraynova N.A., Izyumova V.I., Golkin V.B., Khvedchanya O.A., and Sokolov V.A.
New asbestos-free frictional materials and products. pp. 201--207
Summary: The present review of the TIIR Company proposes a broad range of friction asbestos-free materials developed for various industrial and agricultural applications. The TIIR brand brake liners and shoes are supplied to assembly lines of leading Russian truck manufacturers. The article presents the data about development of friction articles both as standard pieces and spare parts.
Shuster L. Sh., Migranov M. Sh., Chertovskikh S. V., and Sadykova A. Ya.
Triboengineering characteristics of ulttra-fine granularly structured titanium produced by intensive plastic deformation. pp. 208--214
Summary: Methods and results of an experimental study of triboengineering properties of ultra-finely structured titanium produced by intensive plastic deformation, including the friction coefficient molecular component, the shear strength of adhesive bond and others, at various contact temperatures and loads are described. It is determined that production of an ultra-finely structured titanium increases its strength characteristics, reduces the friction coefficient adhesive (molecular) component and its tendency to seizure in friction. This effect intensifies of the grains become smaller and the contact temperature elevates. The obtained results enable to predict the performance characteristics when such ultra-finely structured titanium is used in tribocouples of machinery under various temperature and load conditions. Also it is easier machined at the stage of production process preparation.
Aslanyan I. R. and Barykin N.P.
Extra-dispersed ceramics as a filler in polymers. pp. 215--218
Summary: The results of phase and chemical composition of oxide ceramics as a by-product of oil and gas refining are described. The results of triboengineering tests of polyethylene composites filled with oxide ceramics are discussed. It is shown that ceramic particles in the polymeric matrix both inhibits formation of debris and noticeably reduces the wear rate.
Feldshtein E.A., Grebnev N.P., and Kulbitskii V.E.
Regularities of friction and wear of fused antifriction materials. pp. 219--223
Summary: Regularities of lubricated friction of the antifriction fused material - hardened steel in concentrated contact are discussed. Momentary friction coefficients, temperature in the contact zone and wear rate of iron- and copper-based are considerably lower than those of cast bronze BrO5Ts5C5. The conditions of finish machining of friction surfaces affect strongly the topography of contacting surfaces thus influencing the triboengineering characteristics.
ХРОНИКА. p. 224
/ Издания академии / Научные журналы / К началу страницы
Designed and maintained by Dr. Nikolai N. Kostyukovich. Last updated: August 15, 2005
Created with assistance of Dr. Ignatii I. Korsak
Copyright © 2005 The National Academy of Sciences of Belarus
Copyright © 2005 The V.A.Biely Institute of Mechanics of Metal-Polymer Systems
