Трение и износ, 2000, Vol.21, No.2
/ Издания академии / Научные журналы
Трение и износ, 2000, Vol.21, No.2
Том 21, номер 2; март-апрель, 2000
СОДЕРЖАНИЕ
СТАТЬИ
Demkin N.B.
Multilevel friction contact models. pp. 115--120
Summary: Machining of parts produces microirregularities of various sizes on their surfaces. This surface structure strongly influences the behavior of a friction contact by altering its rigidity and related dumping features, the actual and contour contact area, hence, the force of friction and the wear resistance. The surface structure alters the volume of the intercontact space and the oil capacity in the joints. The effect of the surface microgeometry structure upon the friction contact behavior is considered.
Tikhomirov V.P., Gorlenko O.A.
Kinetic model of friction of solids. pp. 121--127
Summary: A phenomenological model is advanced which allows to assess the relationship between the friction coefficient and the sliding velocity. The model is based on the idea about the active center being a space and time phenomenon on the friction surface. Resistance to the relative shear is assumed to be determined by the interactions between active centers located on mated surfaces of friction couples. An expression is derived allowing to assess the friction coefficient quantitatively as a function of relative sliding velocity and temperature. Examples illustrate the obtained relationship.
Grigoriev A.Ya., Cho K.-L, Myshkin N.K.
A method of comparative analysis of surface textures. pp. 128--133
Summary: Methods and results of the analysis of the texture using the images of rough surfaces are disclosed. The images of intact and corroded surfaces were coded according to their height and served as the original data. The images presented various types of surface textures which are characterized by a specific type of the matrix of occurrence. The matrix is the probability of coincidence of the azimuth orientation between the gradients of pairs of points on the surface and the spacing between them. Comparison of the matrices of two surfaces has allowed to identify some thresholds for coinciding / differing elements of the matrices. The process of imaging included the identification of the points on the surface which corresponded to the specified elements. The results manifest good coincidence with the visual expert assessment of the features of the texture and provide an adequate semantic description of specific features,
Drozdov Yu.N., Seok-Sam Kim
Reliability and service life of friction units in space engineering systems. pp. 134--140
Summary: Analysis of the space engineering systems reliability shows the necessity of paying a serious attention to the problems of friction, scoring, seizure and wear arising in tribounits. So, together with prediction of strength, heat resistance, rigidity, vibroresistance and sealing characteristics it is necessary to evaluate the reliability and service life of the space systems using the tribological factors.
Zamyatin A.Yu., Zamyatin V.Yu.
Development of a system of computerized calculation and experimental determination of the parameters of friction fatigue of linearly contacting surfaces. Part 1. Basic algorithm. pp. 141--146
Summary: Original postulates and prerequisites are analyzed applied to developing a method of calculation and experimental determination of basic parameters of the friction fatigue of friction surfaces nominally contacting along a line. The essence of the advanced method is described and the necessary relations are disclosed.
Ovchinnikov E.V., Leshchik S.D., Struk V.A., Kholodilov O.V., Fedorov D.I.
Triboengineering characteristics of composite multilayered coatings. pp. 147--157
Summary: Regularities of formation of electrolytic coatings modified with ultradispersed diamond plasters (nanodiamonds) have been investigated. Introduction of the plasters alters the kinetics of formation of electrolytic chrome coatings promoting microhardness and wear resistance. Composite materials based on chrome diamond coatings and fluorine containing oligomers manifest praiseworthy strength, triboengineering and corrosion properties. They are due to the appearance of chemosorption bonds between the components of the chrome-diamond substrate and the macromolecules of the fluorine containing oligomers. Heat treatment intensifies the processes of structure formation in the films of fluorine containing oligomers. The conditions of application of galvanic coatings and fine coatings of the fluorine containing oligomers have been optimized. Triboengineering tests of the new multilayered composite coatings have been performed.
Chichinadze A.V., Braun E.D., Sinaiskii V.M., Kozhemyakina B.D., Gekker F.R., Suvorov A.V.
Interrelation of friction-wear and temperature characteristics of loaded opposite and similar friction couples under stationary and non-stationary regimes of friction. pp. 158--166
Summary: Interrelation of friction-wear and temperature characteristics of opposite and similar friction couples by external friction is discussed. As it has been indicated here, maximal temperature on discrete friction surface mainly affects upon coefficient of friction and upon intensity of wear. This maximal temperature is determined according to hypothesis concerning summation of temperature which is proved by theory of heat dynamics and modeling of friction and wear (HDFW) of friction couples at dry and boundary friction.
Aderikha V. N., Dovgyalo V.A., Pleskachevskii Yu.M., Konopleva I.I.
The effect of radiation chemical functionalization of polyethylene upon the structure and the triboengineering behavior of polymeric polyamide-polyethylene mixtures. pp. 167--173
Summary: The effect of radiation modified polyethylene (PE) upon the structure, strength properties and triboengineering behavior of the mixtures of polyamide (PA) and high density polyethylene has been investigated. It has been established that functionalization by radiation causes a more regular distribution of PE in the PA matrix and reduces the number of defects in the interface between the components of the mixture, it is also due to the appearance of a block-copolymer. The matrix adheres stronger to the dispersed filler producing mechanical hardening and significantly improving the wear resistance of the mixtures.
Konchits V.V., Korotkevich S.V., Kirpichenko Yu.E., Plaza S., Margelevski L.
Formation peculiarities and tribo-physical properties of lubricating layers contacting with heated surface. pp. 174--182
Summary: Composition, physical-mechanical and friction properties of lubricating layers formed on steel by inactive and chemical-active lubricant components is studied by electrical probing methods and XPS analysis. Combined measurements of friction and contact conductivity both in static and dynamic point contact have shown the approach to be promising in separate studies of properties of of physically adsorbed layer (A-layer) and chemosorbed layer of deposits (D)-layer). The confirmation have been obtained that D-layers can be formed on metal surface at elevated temperatures by both active additives and inactive components of mineral oil. Lubricating layers with different physical-mechanical and frictional properties can be formed depending on chemical origin of the lubricating medium and temperature regime.
Zyuzina G.F., Gribova I.A., Krasnov A.P., Slonimskii G.L., Askadskii A.A., Dubrovina L.V., Komarova L.I., Nikolskii O.G.
Investigation of the structure and friction features of materials produced from mixtures of little compatibile polymers--polyarylate and polycarbonate. pp. 183--191
Summary: The structure and the frictional features of the specimens of materials are studied after they were produced by mold pressing of little compatible polyarylates of the grade DV and polycarbonate (PC) and their mixtures. It is demonstrated that these conditions produce a ramified structure in DV and PC. When mixtures of the polymers are processed, their copolymers, or polyester carbonates, appear with different (block or ramified) structures depending upon the ratio between the components. It has been established that the structure and the composition of the materials based on these polymers determine their behavior in friction.
Gurei I.V., Pashechko M.I.
Electrochemistrical characteristics by secondary structures under the friction slip carbon steels after frictional hardening. pp. 192--196
Summary: Technique of research quality secondary structures is introduces, which lies in measurement electrolytic potential and pH-medium in area of contact. White layers - specific structure stressed condition forms in surface layers by friction hardening. Full correlation between quantity of wear hardened pair of friction and electrolytic potential was observed. Dynamics processes of formation secondary structures define by change of value electrolytic potential.
Pinchuk E.L., Markova L.V.
Magnetic methods and devices for fast diagnostics of tribocouples (A review). pp. 197--204
Summary: Magnetic methods of analyzing debris and devices for diagnostics of wear of tribocouples are reviewed and classified. It is demonstrated that the most popular is the method of magnetic accumulation. Most popular diagnostics devices using magnetic methods are described.
Kukareko V.A., Tolstoi A.V.
The structure and the tribological features of the copper-beryllium alloy. pp. 205--212
Summary: A relationship between the structural condition of the copper-beryllium alloy and its resistance to wear has been studied in dry friction. It is demonstrated that the fields of elastic interphase deformations producing the strain of the crystalline lattice of particles of an originating phase impair the wear resistance of the alloy, meanwhile its hardness remains unaffected. Relaxation of the interphase deformations at later aging stages significantly improves the wear resistance of the alloy, though its hardness declines.
Gaivoronskii A.T., Gaivoronskaya M.V., Prokop'ev G.A.
The need of consideration of variations of barothermal behavior of lubricating materials under high loads. pp. 213--218
Summary: Determination of the rheological features of lubricating materials and additives are reviewed when they function in engineering and technological cycles under high loads. A conclusion is made that the barothermal behavior of oils should be taken into consideration in order to describe the tribological behavior more precisely.
Sirovatka L.A., Dmitrieva T.V.
Development of novel environmentally safe process fluids and lubricating materials based on rape seed oil. pp. 219--224
Summary: The dispersing and lubricating behavior of binary systems based on rape seed oil and simple oligoesters has been investigated. The following has been established: (1) the dispersing behavior of the oil has extreme pattern of dependency as the oligomer concentration changes; (2) rape seed oil reduces the friction coefficient within a broad range of loads. It is demonstrated that the lubricity of rape seed oil can be improved by adding slight amounts of polyoxypropylenc diols and polyoxyethylene diols.
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Designed and maintained by Dr. Nikolai N. Kostyukovich. Last updated: October 6, 2000
Created with assistance of Dr. Ignatii I. Korsak
Copyright © 2000 The National Academy of Sciences of Belarus
Copyright © 2000 The V.A.Biely Institute of Mechanics of Metal-Polymer Systems
