Trenie i Iznos (Friction and Wear), 2009, Vol.30, No.3
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Trenie i Iznos (Friction and Wear), 2009, Vol.30, No.3
Volume 30, Number 3; May--June, 2009
CONTENTS
ARTICLES
Jubilee of V. A. Belyi Metal-Polymer Research Institute of National Academy of Sciences of Belarus. pp. 211--213
Bogdanovich P. N. and Tkachuk D. V.
Thermal and thermomechanical phenomena in sliding contact. pp. 214--229
Summary: The paper outlines the development of heat problems in tribology starting from the works of H. Blok till nowadays. Blok proposed the flash temperature concept which has become the basis for thermotribology. Main frictional heating models are analyzed including the models of Blok, Jaeger, Archard, and Kuhlmann-Wilsdorf. The effect of various factors on the flash temperature and its distribution over the friction surface is discussed. The influence of frictional heating on wear modes of materials is considered.
Ermakov S. F., Nikolaev V. I., Beletskii A. V., Pashkevich L. A., and Eismont O. L.
Computerized complex for studying friction in synovial joints. pp. 230--235
Summary: The paper describes the design and operation of a computerized pendulum tribometer intended for studying the tribological behavior of synovial joints. Its effective use to investigate friction in the cartilage--cartilage pair is proven for the case when a dissected joint contains lubricating fluids different in their origin, i.e. natural and artificial.
Kupchinov B. V.
Mechanisms of action and efficiency of liquid crystal additives to lubricants. pp. 236--239
Summary: The results of study of the efficiency of using nematic liquid crystals as additives to lubricants are reported. It is shown that liquid crystals provide high tribological properties of lubricants owing to the formation of ordered layers on friction surfaces. This leads to increase in the carrying capacity and decrease in the friction coefficient and wear of a friction unit. The application of nematic liquid crystals as additives to oils is a new trend in tribology. In 1998 a team of researchers from the MPRI of NAS of Belarus was awarded by the diploma for the scientific discovery "Capability of synovial fluid of providing high antifriction properties of cartilages in joint by realization of mesomorphic nematic state of lubricant in friction zone".
Pinchuk L. S. and Chernyakova Yu. M.
Methodology of tribological correction of osteoarthritis joints. pp. 240--244
Summary: The paper describes the methodology of the correction of the tribological behavior of synovial joints affected with osteoarthritis by using blood dialysates. The concept of the medicine and immunological modification of lubricating fluids based on blood serum is justified. It is based on the fundamental capability of living tissues to heal defects on cartilage surfaces during metabolism.
Argatov I. I., Dmitriev N. N., Petrov Yu. V., and Smirnov V. I.
Threshold erosion fracture at oblique incidence. pp. 245--253
Summary: The model of erosion of the subsurface layer in the case of incidence of abrasive particles at various angles of attack is constructed on the basis of the Hertz theory and the law of the abrasive surface wear. Calculation formula for the velocity of the erosion is derived under the condition that the mechanism of erosion is determined by the surface wear at the slippage of the abrasive particles along the surface during the time of contact. Incubation-time criterion of fracture is applied for prediction erosion rate. The effects of erosive particle size, particle velocity and impact angle on wear rate have been examined.
Kolesnikov V. I., Ermakov S. F., Sychev A. P., Myasnikova N. A., Savenkova M. A., and Luneva E. I.
Improvement of tribological and physical-chemical characteristics of lubricating compositions Puma with lithium phosphoromolybdate. pp. 254--260
Summary: The paper considers results of the study of physical-chemical and tribological properties of lubricating compositions Puma applied in railway transport to lubricate rails and flanges and modified with the polymer inorganic phosphoromolybdate additive proposed by the authors. The effect of the lubricating compositions Puma containing the lithium phosphoromolybdate additive on the wear of rail and wheel steels is studied. A possible mechanism of the action of polymer inorganic phosphoromolybdate additives is discussed. The paper continues the research on the application of polymer inorganic phosphates as multifunctional additives to railway greases.
Savenko V. I.
About dissipation of energy in quasielastic materials under cyclic rolling. pp. 261--268
Summary: In the limits of the concept of the dislocation nonelastic behaviour as a reason of the hysteresis losses in quasielastic materials the experimentally-theoretical connections have been found between density of energy dissipated in contact pare under cyclic rolling process and structural-mechanical characteristics in subsurface layer of deformed material. It has been found that the energy losses in material with high yield stress in subsurface layer depend not only on the contact pressure or yield stress point but largely upon the dispersion of the dislocation start stress distribution.
Semenov V. I., Jeng Y.-R., Huang S.-J., Dai Y.-Zh., Hwang S.-J., Shuster L. Sh., Chertovskikh S. V., and Lin P.-Ch.
Tribological properties of magnesium alloy, strengthened with silicone carbide and severe plastic deformation. pp. 269--274
Summary: Results of tribological contact characteristic investigation of R18 tool steel out of AZ91D magnesium alloy, strengthened with SiC disperse powder filler and severe plastic deformation (SPD), namely equal channel angular pressing (ECAP), are presented in this work. It was determined that friction coefficient increases and wear rate reduces after silicone carbide powder filler has been introduced to the magnesium alloy. The size and volume of powder filler particles, normal load and relative sliding speed influence these tribological characteristics. SPD of the initial material leads to decrease in friction coefficient molecular component.
Chichinadze A. V.
Theoretical and applied problems of heat dynamics and modeling of friction and wear of frictional pairs. pp. 275--295
Summary: Main statements of heat dynamics and modeling of friction and wear of frictional pairs are presented and practical problems of using universal friction machines for estimating frictional heat resistance of materials and thermal-pulse friction. Brakes and clutches are used as an example to analyze the application of the method of heat dynamics and modeling of friction and wear for predicting performance characteristics of frictional units at the design stage.
REVIEWS
Sergienko V. P. and Bukharov S. N.
Noise and vibration in brake systems of vehicles. Part 2. Theoretical prediction procedures. pp. 296--310
Summary: The paper reviews theoretical research in nose, vibration and hardness (NVH) of automotive brake systems. Introduction of fundamental mechanisms of the noise and vibration appearing at braking are presented. The analysis is given of numerical, experiment-calculated methods and analysis procedures used in the study of automotive brake NVH. Results of prediction the friction induced vibration are considered.
MEN OF SCIENCE
Marat A. Bronovets (70th anniversary). pp. 311--312
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Created with assistance of Dr. Ignatii I. Korsak
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Copyright © 2009 The V.A.Biely Institute of Mechanics of Metal-Polymer Systems
