Trenie i Iznos (Friction and Wear), 2001, Vol.22, No.3
/ Publications / Scientific Journals
Trenie i Iznos (Friction and Wear), 2001, Vol.22, No.3
Volume 22, Number 6; November--December, 2001
CONTENTS
ARTICLES
Argatov I.I.
An approximate solution of the axisimmetric contact problem of the pressure of the ball indentor on the rough elastic semispace. pp. 601--605
Summary: The problem of contact between the die shaped as a rotating paraboloid and the elastic semispace with a fine rough interface surface is considered. A closed approximate solution has been obtained.
Prikhodko V.M., Kotelnitskaya L.I.
A mathematical model of hydrodynamic lubrication when the radial bearing surface melts. pp. 606--608
Summary: A theoretical model has been elaborated how hydrodynamic lubrication sets in on the radial bearing surface when it melts under load. A precise self-similar solution of the problem has been obtained together with the analytical dependencies of the basic characteristics of the bearing. It has been established that the bearing surface profile acquires a larger load carrying capacity because the melt lubricates the surface and boundary friction conditions set in.
Zharov I.A.
Optimization of the parameters of the conformal profile of rails along the curve when the wagon bogie moves in a quasistationary manner. pp. 609--618
Summary: An approach is proposed how to determine the optimal profiles of wheels and rails. The optimal profile has been determined and guides have been elaborated how to control the wear of wheels and rails by optimizing their profiles.
Bereznyakov A.I.
Correlation between the wear rate and the force of friction. pp. 619--624
Summary: A mechanostatistical model of the wear process of rubbing surfaces is examined. An equation is derived correlating the wear rate with the characteristics of the surfaces in friction.
Ginzburg B.M., Tochilnikov D.G., Kozyrev Yu.P.
The effect of shear deformation on the mechanism of wear of polycrystallie solids in sliding friction. pp. 625--630
Summary: A hypothesis is advanced about a possible new mechanism of friction and wear of the surfaces of crystalline solids during dry friction and boundary sliding friction. The hypothesis is based on the assumption that the shear deformation of crystalline grains (over the microundulations on the friction surface) reduces the temperature at which they melt, also it is assumed that the absolute extent of shear deformation, on the one hand, produces a rivaling effect and rate of shear deformation, on the other hand, affects the melting temperature. The advanced hypothesis correlates with the available empirical relations of friction and wear of steel within a broad range of variations of normal loading on the friction surface. The proposed mechanism of friction and wear does not reject the hypotheses advanced before and can coexist with them.
Akhverdiev K.S., Melnikova E.P., Luparenko E.V.
A mathematical model of the coolant lubricant flow between the surfaces of the tool and the blank. pp. 631--637
Summary: A mathematical model has been elaborated how the coolant lubricant flows during the finish machining of blanks. The flow of the coolant lubricant in the zone of plastic deformation has been examined. The effect of the difference between the temperatures of the tool and the blank, internal heat generation in case of a pressure gradient have been incorporated into the analysis. The effects of the profiles of the speed and friction on the surfaces of the tool and the blank are described.
Zharin A.L., Shipitsa N.A., Saroka D.I.
Determination of characteristics of fatigue failure of materials in sliding friction. Part 3. Statistical analysis and physical interpretation of results. pp. 638--643
Summary: It is shown that the harmonic analysis of periodic changes of the electron work function on the friction surface allows to determine the cyclic durability of a material and the probability of its failure when the assigned cyclic durability is extended to a rather broad range. The obtained values of the cyclic durability allow to construct fatigue failure curves and to determine fatigue failure parameters.
Kopchenkov V.G., Penkin N.S.
Experimental study of the mechanism of contact interactions between the elastic surface and solid particles during impacts. pp. 644--649
Summary: The parameters describing the mechanism of interactions between solid particles and the elastic surface during impacts have been studied comprehensively. It has been established that the angle of incidence affects the pattern of motion of the particles.
Kuzharov A.D., Bulgarevich S.B., Kuzharov A.A., Burlakova V.E., Kravehik K.
Molecular mechanisms of self-organization during friction. Part IV. Self-excited oscillations during friction with giant copper clusters. pp. 650--658
Summary: A molecular mechanism is advanced to explain the synchronous self-oscillations of the friction coefficient and electrical resistance in the friction contact between bronze and steel when nanometric copper clusters dispersed in the water-glycerin mixture lubricate them. The mechanism of self-organization is based on the assumption that clusters periodically coagulate on rubbing surfaces; the stimulating parameter is the gradient of electrolyte concentration in the lubricating layers directly adjacent to the contact surface.
Shapovalov V.V., Kostygov V.T.
Predicting the triboengineering behavior of lubricated friction units based on the real substructural parameters of the tribolayer. pp. 659--663
Summary: Studies of the processes of dislocation in active tribolayers of friction units under heavy loading have led to new numerical criteria characterizing the effect of lubricating materials on the structural stress-strain state of the layers. It is shown how real mechanical parameters are calculated and a prediction of their triboengineering characteristics is made.
Drozdel P.
The wear of liners when the internal combustion engine is started. pp. 664--670
Summary: Some causes are discussed why the cylindrical liners wear more intensively when internal combustion engines are started. A correlation has been established between the workbench and operation tests at various starting temperatures. The accomplished studies have allowed to determine the wear of cylinders and how the starting temperature affects it.
Antsiferov V.N., Latypov M.G., Shatsov A.A.
Carbidosteels with the metastable austenite structure. pp. 671--676
Summary: Carbidosteels with a relatively small concentration of the solid phase based on low-alloyed tripsteels with inhomogeneous concentrations combine the strength of structural materials with the wear resistance of ferrotitanium alloys containing a large share of TiC. These materials can be produced using standard powder metallurgy techniques. A significantly higher resistance of tripsteels to abrasion reduces the accumulation of attendant impurities.
Burya A.I.
Friction and wear of carboplastics based on aromatic polyamides. pp 677--683
Summary: The disclosed data show how the concentration of carbofibers, their behavior and conditions of operation influence the triboengineering performance of carboplastics based on heat resistance aromatic phenylone polyamides. It is shown that the carboplastics containing 15--20% fibers by mass have the best triboengineering characteristics.
Broscheva P.N., Okhlopkova A.A., Yuchugaeva T.S., Popov S.N., Sleptsova S.A.
Performance of natural diamond powders as fillers in polytetrafluorethylene. pp. 684--688
Summary: Mechanophysical and triboengineering characteristics, the structure of polytetrafluorethylene filled with natural diamond powders have been studied after mechanical activation. It is shown that mechanical activation influences the processes of formation of the supermolecular structure of the polymeric matrix improving the performance of composites.
Zlotnikov I.I., Volnyanko E.N.
Features of application of silicate polymeric fillers in lubrcating oils. pp. 689--692
Summary: The performance of silicate polymeric fillers in lubricating oils has been studied. The fillers were produced by chemical reactions of the solution of sodium silicate with phenol formaldehyde, epoxy oligomers and N,N'- meta-phenylene-dimaleimide. It is shown that introduction of the new fillers into the base oil boosts the working loads and reduces the friction coefficient compared with common silica gel and sialon fillers.
Dmitrieva T.V., Sirovatka L.A., Bortnitskii V.I.
Compositions based on rapeseed oil and functional additives. pp. 693--698
Summary: It has been studied how oleic acid, triethanolamine and its salts as functional additives influence the triboengineering characteristics and heat stability of rapeseed oil in order to use them to produce environmentally and process safe compositions with specified properties. It has been established that the dispersing and lubricating behavior of the compositions changes extremely as the concentration of the functional additives is increased; simultaneously the generation of volatile products of thermal destruction of binary systems intensifies.
Zhevnov V.V., Smurugov V.A., Delikatnaya I.O., Chmykhova T.G., Volnyanko E.N.
The effect of ultradispersed fillers on the rheological characteristics of plastic greases. pp. 699--702
Summary: The effect of a variety of additives and fillers, including ultradispersed fillers, on the theological and tribological characteristics of greases has been studied. It is demonstrated that the ultradispersed particles (b-sialon) promote the load carrying capacity of the lubricating layer and reduce the stiffness of the structural core improving its antiwear performance.
Barinov S.V., Zagorodskikh B.P., Simdyankin A.A.
Improving wear resistance by sandwiching. pp. 703--706
Summary: It has been studied how the wear resistance of cast-iron specimens from the diesel cylinder sleeve changes when they are crosssandwiched with non-ferrous metals and alloys. Relationships have been obtained between the wear of the specimens and the duration of tests, the composition of the debris has been determined.
MEN OF SCIENCE. p. 707
REVIEW. p. 708
CONFERENCE CALENDAR. p. 709
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Designed and maintained by Dr. Nikolai N. Kostyukovich. Last updated: March 27, 2002
Created with assistance of Dr. Ignatii I. Korsak
Copyright © 2001, 2002 The National Academy of Sciences of Belarus
Copyright © 2001 The V.A.Biely Institute of Mechanics of Metal-Polymer Systems
