Міжнародні видання

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An analytical solution to the problem of thermoelastic bending of a multilayer beam with different temperature of longitudinal faces
(2021-06) Ковальчук, Станіслав Богданович; Горик, Олексій Володимирович
Analytical Solution of the Problem of Thermoelastic Deformation of a Nonuniformly Rotating Multilayer Disk
(2020-03) Ковальчук, Станіслав Богданович; Горик, Олексій Володимирович; Зiньковський, Анатолiй Павлович
Analytical Solution to the Plane Bending Task of the Multilayer Beam with a Circular Axis under Normal Uniform Loading
(2020-09) Ковальчук, Станіслав Богданович
Application of tne fish search algorithm for optimization plans of the full factor experiment
(IEEE Operations Center 445 Hoes Lane,P.O. Box 1331, Piscataway, NJ 08855-1331 USA, 2018) Muratov, V. ; Koshevoy, M.; Kostenko, O. M.; Костенко, Олена Михайлівна
A method and program was developed to optimize the plans for a full factorial experiment using the search algorithm for fish. A comparative analysis of methods for the synthesis of optimal full-scale experiment experiments for cost and time costs has been carried out. The efficiency of the method was tested on a number of such technological objects: fuel consumption in the internal combustion engine, welding of thin plates, production of parts by hot stamping, and also the process of servicing machines with numerical control. The effectiveness of the method of searching for fish by the school is shown.
Bimetallic Temperature Sensors
(2019) Koshevoy, M. ; Koshevaya, I.; Fesenko, A.; Kostenko, O. M.; Костенко, Олена Михайлівна
Building an analytical model of the gravitational grain movement in an open screw channel with variable inclination angles
(2021-07-01) Арендаренко, Володимир Миколайович; Антонець, Анатолій Вікторович; Іванов, Олег Миколайович; Дудніков, Ігор Анатолійович; Самойленко, Тетяна Володимирівна
Classification rule for determining the temperature regime of induction gray cast iron
(2021-01-30) Stanovska, Iraida; Duhanets, Vasyl; Prokopovych, Lada; Yakhin, S. V.; Яхін, Сергій Валерійович
Development of an analytical model of the controlled movement of grain material on the bulk shelves of a loading-gravity-cascade unit
(2025-06-17) Antonets, A.; Антонець, Анатолій Вікторович; Arendarenko, V.; Арендаренко, Володимир Миколайович; Ivanov, O.; Іванов, Олег Миколайович; Dudnikov, I.; Дудніков, Ігор Анатолійович; Liashenko, S.; Ляшенко, Віктор Васильович
The object of research is the gravitational movement of grain along the transfer shelves and a cascade loading unit with two acceleration and two braking sections. The study of such movement is carried out to confirm theoretical studies on the development and justification of an analytical model of controlled gravitational movement of grain along transfer shelves. When loading grain, it can be injured when falling from a considerable height and hitting the bottom and walls of the container. This problem requires the development and study of a technical solution that would provide regulation of the velocity of grain movement when loading it into the container. Theoretical studies were carried out using the developed analytical model of grain movement and the proposed equations to find the relationships between the angles of inclination of the acceleration and braking shelves of the gravity-cascade unit. Based on the analytical model, an experimental unit was made of two acceleration and two braking shelves. The shelves can freely rotate on the axes to the required angle in the range from 0° to 90° relative to the horizontal plane. For the shelves of the acceleration sections, the angle of inclination α was chosen from the variable series of 45°, 50°, 60°. Based on the angle α, according to the model, the shelf of the first braking section was set at an angle of 20.43°, 20.48°, 20.32°, and the shelf of the second braking section was set at 38.46°, 35.28°, 29.32°. Experimental studies have shown that the velocity of grain movement is indeed regulated by a combination of the ratios of the angles of the acceleration and braking shelves. In this case, the velocity of grain in the last braking section is close to the initial flow velocity at the beginning of the first acceleration shelf. The values of the absolute and relative errors of the experiments of the experimentally determined velocities and the theoretical value of the velocity indicate quite acceptable limits of deviations for this multifactorial experiment. The relative deviation of the experimental from the theoretical velocity of movement of the grain mass does not exceed 12.76%. The results obtained and their analysis indicate that the presented analytical model and the designed gravity-cascade unit due to the braking and acceleration sections allow solving the problem of controlled movement of the velocity of grain for its loading into containers without injury, in particular into silo structures.
Elasticity Theory Solution of the Problem on Bending of a Narrow Multilayer Cantilever with a Circular Axis by Loads at its End
(2018-11) Ковальчук, Станіслав Богданович
Elasticity Theory Solution of the Problem on Plane Bending of a Narrow Layered Cantilever Beam by Loads at Its Free End
(2018-05) Ковальчук, Станіслав Богданович; Горик, Олексій Володимирович
Elastoplastic Deformation of the Surface Layer of Machinery Constructions on Shot Blasting
(Springer US, 2016-10) Горик, Олексій Володимирович; Зіньковський, Анатолій Павлович; Черняк, Роман Євгенович; Брикун, Олександр Миколайович
Shot blasting results obtained on metal surfaces to be further treated by applying protective nonmetallic coatings were experimentally investigated under different process conditions. The procedure of evaluating the elastoplastic deformation behavior of the surface layer using the experimental-analytical coefficient, which considers the elastoplastic properties of the material, is described. Results of comparing experimental and theoretical data are summarized. The grounds for a possible fracture mechanism on shot blasting of the surface layer of metal products are presented.
Energy Spectrum of Impact Casual Quasimixed Type Signals
(2006) Smerdov, Andrey; Brykun, O. M.; Брикун, Олександр Миколайович
Exact Solution of the Problem of Elastic Bending of a Multilayer Beam under the Action of a Normal Uniform Load
(2019-08) Ковальчук, Станіслав Богданович; Горик, Олексій Володимирович
Exact Solution of the Problem on Elastic Bending of the Segment of a Narrow Multilayer Beam by an Arbitrary Normal Load
(2020-03) Ковальчук, Станіслав Богданович
FROM HARD TO SIMPLE USING «SHISHAKY TECHNOLOGIES»
(Scientific-technical union of mechanical engineering, 2015) Падалка, Вячеслав Вікторович
This work is dedicated to the problem of ecological agriculture. The analysis of existent technologies of minimum till of soil is conducted. The more similar examples to ecological agriculture are separated on the example of such system implanted in PE "Agroecology". We offer a system of concepts of till of soil for maintaining its fertility and growing ecologically clean products of crop production. We light up the problem of insufficient maintenance of moisture and ways of destruction of non-arable sole by mechanical and biological character. We offer an example of technological operations of till of soil that is implanted for ecological and biologically restorative agriculture.
Influence of parameters of omelets’ treatment process with high pressure on their microbiological safety Journal of FOOD and PACKAGING Science, Technique and Technologies
(2018) Sukmanov, V. O.; Сукманов, Валерій Олександрович; Падалка, Вячеслав Вікторович
JUSTIFICATION OF CHOOSING RECOVERY METHOD FOR CYLINDER LINERS OF AUTOTRACTOR ENGINES
(Scientific and Educational Consulting Group "World Science", 2015) Gorbenko, O. V. ; Kelemesh, A. O. ; Горбенко, Олександр Вікторович; Келемеш, Антон Олександрович
The article deals with the choosing of promising recovery method for cylinder liners of autotractor engines. The results of the study of wear resistance of cylinder liners using a variety of process liquids are presented.
Major stress-strain state of double support multilayer beams under concentrated load. Part 1. Model construction
(Інститут проблем машинобудування ім. А.М. Підгорного, 2018-02) Ковальчук, Станіслав Богданович; Горик, Олексій Володимирович
The development of composite technologies contributes to their being widely introduced into the practice of designing modern different-purpose structures. Reliable prediction of the stress-strain state of composite elements is one of the conditions for creating reliable structures with optimal parameters. Analytical theories for determining the stressstrain state of multilayer rods (bars, beams) are significantly inferior in development to those for composite plates and shells, although their core structural elements are most common. The purpose of this paper is to design an analytical model for bending double support multilayer beams under concentrated load based on the previously obtained solution of the elasticity theory for a multi-layer cantilever. The first part of the article includes a statement of the problem, accepted prerequisites and main stages of constructing a model for bending a double-support multi-layer beam with a concentrated load (normal, tangential force and moment) and general-view supports in the extreme cross-sections. When building the model, the double support beam was divided across the loaded cross-section and presented in the form of two separate sections with equivalent loads on the ends. Using the general solution of the elasticity theory for a multilayer cantilever with a load on the ends, the main stress-strain state of the design sections was described without taking into account the local effects of changing the stress state near the concentrated load application points and supports. The obtained relations contain 12 unknown initial parameters. To determine them on the basis of the conditions of joint deformation (static and kinematic) of design sectors, a system of algebraic equations has been constructed. The constructed model allows one to determine the components of the main stress-strain state of double support beams each consisting of an arbitrary number of orthotropic layers, taking into account the amenability of their materials to lateral shear deformations and compression.
Major Stress-Strain State of Double Support Multilayer Beams Under Concentrated Load. Part 2. Model Implementation and Calculation Results
(Інститут проблем машинобудування ім. А.М. Підгорного, 2019-04) Ковальчук, Станіслав Богданович; Горик, Олексій Володимирович
The development of composite technologies contributes to their wide introduction into the practice of designing modern different-purpose structures. Reliable prediction of the stress-strain state of composite elements is one of the conditions for creating reliable structures with optimal parameters. Analytical theories for determining the stress-strain state of multilayer rods (bars, beams) are significantly inferior in development to those for composite plates and shells, although their core structural elements are most common. The purpose of this paper is to design an analytical model for bending double support multilayer beams under a concentrated load, with the model based on the previously obtained elasticity theory solution for a multilayer cantilever. The second part of the article contains examples of the implementation of the model for bending double-support multilayer beams under a concentrated load, with the model constructed in the first part of the article. Using this model, solutions to the problems of bending multilayer beams with different types of fixation of their extreme cross-sections were obtained. The resultant relations were approbated using test problems for determining the deflections of homogeneous composite double-support beams with different combinations of fixation, as well as in determining the stresses and displacements of a four-layer beam with a combination of a rigid and hinged fixation at its ends. The results obtained have a slight discrepancy with the simulation results by the finite element method (FEM) and the calculation by the iterative model for bending composite bars, even for relatively short beams. In addition, it is shown that the neglect of the shear amenability of layer materials results in large errors in determining the deflections, and in the case of statically indefinable beams, reactive forces and stresses. The approach used in the construction of the model can be extended to the case of beams with arbitrary numbers of concentrated forces and intermediate supports, and to calculate multilayer beams with different rigidity of their design sections.
Presentation of Rewport: The Simultaneous Use of Excel and GeoGebra to Training the Basics of Mathematical Modeling
(2019-06-12) Flehantov, L. O.; Ovsiienko, Y.; Флегантов, Леонід Олексійович

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