2_2011_sen_16

Title of the article

INFLUENCE OF CORROSION DAMAGES ON CARRYING ABILITY OF OIL PIPELINES
Authors

Kozik A.N., Chief Engineer of JSC "Gomeltransneft Friendship", Gomel, Republic of Belarus

Vorobyov V.V., Candidate of Technical Sciences, Engineer of JSC "Gomeltransoil Friendship", Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICS OF TRIBO-FATIGUE SYSTEMS
Year 2011 Issue 2 Pages 81-85
Type of article RAR Index UDK 539.43; 620.16+621.644→622.692.4 Index BBK  
Abstract Characteristic kinds of local corrosion damage of an internal surface of pipes of underwater transitions after long (more than 35—40 years) operation are established: in the form of an oval and an extended strip; the mechanism of their formation is described. By specially put natural experiments (destruction of petrowire pipes at test under pressure) is shown that after long operation zones with local corrosion damages are dangerous not zones of longitudinal welded connections, namely. The method and technology of restoration of working capacity
of underwater transitions after their long operation is stated; it provides decrease in risk of failures and safety increase.
Keywords

oil pipe, maintenance, corrosion damage, strength reliability, tests, underwater crossings
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Bibliography
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  • Sosnovskij S.V. [et al.]. Metody i rezul'taty jeksperimental'nyh issledovanij linejnogo uchastka nefteprovoda kak tribofaticheskoj sistemy [Methods and results of experimental studies of linear section of a pipeline as tribo-fatigue system]. Tr. VI Mezhdunar. simpoz. po tribofatike (ISTF 2010) [Coll. of sci. papers of the VI Intern. symposium. on tribo-fatigue (ISTF 2010)]. Minsk, BGU, 2010, vol. 1, pp. 351-360.
  • Kazhdyj god sistema transporta nefti na Aljaske daet utechki [Each year the system of transport of oil in Alaska gives leak]. Neft' i capital [Oil and capital], 2006, no. 8, pp. 92-94.
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2_2011_sen_15

Title of the article

DYNAMICS OF TRIBO-FATIGUE SYSTEM
Authors

Sherbakov S.S., Candidate of Physical and Mathematical Sciences, Associate Professor of the Department "Theoretical and Applied Mechanics", Belarusian State University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICS OF TRIBO-FATIGUE SYSTEMS
Year 2011 Issue 2 Pages 76-80
Type of article RAR Index UDK 539.3 Index BBK  
Abstract Dynamic loading of tribo-fatigue system leads to development of non-stationary process of cyclic deformation in a zone of contact interaction. In system a roller/shaft at simultaneous realisation of a rolling friction and not contact bend of a shaft on a contact surface irregular wavy residual damages (the phenomenon troppy) are formed (under certain conditions). On the basis of results of an experimental research of the specified damages observed in process of wear-fatigue tests, the mehaniko-mathematical model which well describes the phenomenon troppy with the account as movements of tribo-fatigue system, and its non-stationary is intense-deformed condition and a condition of damage is constructed. It is shown that wavy damages of rails while in service can be considered as a special case of troppy; it opens ways for effective search of methods of struggle against them.
Keywords

tribo-fatigue system, phenomenon of tropp, time-dependent stress-strain state, state of damage, dangerous amount
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Bibliography
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2_2011_sen_13

Title of the article

DESIGNING OF HIGHLY EFFECTIVE TECHNOLOGICAL PROCESSES OF CHEMICAL HEAT TREATMENT OF THE VEHICLES TRANSMISSION GEARS
Authors

Rudenko S.P., Candidate of technical Sciences, Head of the Sector of Technology and Equipment of Heat Treatment of Parts of Automotive Equipment, STC "Technology of mechanical engineering and technological equipment", Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

Shipko A.A., Doctor of Technical Sciences, Professor, Deputy Chief of the Department of Technologies of Mechanical Engineering and Metallurgy, STC "Technology of mechanical engineering and technological equipment", Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

Valko A.L., Senior Researcher at the Laboratory of Metallurgy in Mechanical Engineering, STC "Technology of Mechanical Engineering and Technological Equipment", Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

Kuzmenkov O.V., Researcher at the Laboratory of Metallurgy in Mechanical Engineering, STC "Technology of Mechanical Engineering and Technological Equipment", Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus
In the section TECHNOLOGICAL MECHANICS
Year 2011 Issue 2 Pages 67-70
Type of article RAR Index UDK 621.833:621.785.4.52 Index BBK  
Abstract The new approach is led to a choice of technological modes of chemical heat treatment of high durability gears. Software for designing of highly effective technological processes of chemical heat treatment of the vehicles transmission gears are offered.
Keywords

gears, technological processes, chemical and technical treatment, processing software
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Bibliography
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2_2011_sen_14

Title of the article

INVESTIGATION OF LONGITUDINAL VIBRATION OF FLEXIBLE ULTRASONIC WAVEGUIDES BY MEANS OF TRANSFER-MATRIX METHOD
Authors

Stepanenko D.A., Candidate of Technical Sciences, Assistant Professor of the Department "Design and Manufacture of Devices", Belarusian National Technical University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

Minchenja V.T., Candidate of Technical Sciences, Associate Professor, Professor of the Department "Design and Manufacture of Devices", Belarusian National Technical University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

Minchenja N.T., Candidate of Technical Sciences, Assistant Professor of the Department "Design and Manufacture of Devices", Belarusian National Technical University, Minsk, Republic of Belarus
In the section TECHNOLOGICAL MECHANICS
Year 2011 Issue 2 Pages 71-75
Type of article RAR Index UDK 621.937 Index BBK  
Abstract The article considers application of the transfer-matrix method for calculating resonant frequencies of longitudinal vibration of flexible ultrasonic waveguides. Correctness and efficiency of the suggested method are verified by finite-element modelling as well as by the results of experimental studies.
Keywords

ultrasound, waveguide, transfer matrix, finite element method
  You can access full text version of the article.
Bibliography
  • Zhou G. The performance and design of ultrasonic vibration system for flexural mode. Ultrasonics, 2000, vol. 38, pp. 979-984.
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2_2011_sen_12

Title of the article

NUCLEATION OF THE CRACK IN THE PUNCHED BODY AT TRANSVERSE SHEAR
Authors

Guliyev S.M., Candidate of Technical Sciences, Associate Professor of the Department "Technical Disciplines", Azerbaijan State Pedagogical University, Baku, Azerbaijan, This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICS OF DEFORMED SOLIDS
Year 2011 Issue 2 Pages 62-66
Type of article RAR Index UDK 539.375 Index BBK  
Abstract The problem of mechanics of fracture about nucleation of the cracks which are starting with contours of circular apertures punched isotropic body at transverse shear is considered. The solution of a problem on balance of the punched body at transverse shear with prefracture zones is reduced to the solution of two infinite algebraic systems and two nonlinear singular the integro-differential equations with a nucleus such as Cauchy. From the solution of these equations are tractions in zones of nucleation of cracks. The condition for the appearance of a crack is formulated, taking account of the criterion of the limit traction of the bonds in the material.
Keywords

perforated body, fracture process zone, links between banks, powers of material traction, transverse shear
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Bibliography
  • Mushelishvili N.I. Nekotorye osnovnye zadachi matematicheskoj teorii uprugosti [Some basic problems of mathematical theory of elasticity]. Moscow, Nauka, 1966. 707 p.
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