Browsing by Author "Горик, Олексій Володимирович"
Now showing 1 - 20 of 72
Results Per Page
Sort Options
Item 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 ВолодимировичItem Analytical Determination of Reactive Forces for Curvilinear Bars with a Flat Axis of Arbitrary Shape / Аналітичне визначення реактивних зусиль для криволінійних брусів із плоскою віссю довільної форми(2019-12) Ковальчук, Станіслав Богданович; Горик, Олексій ВолодимировичItem Analytical Solution of the Problem of Thermoelastic Deformation of a Nonuniformly Rotating Multilayer Disk(2020-03) Ковальчук, Станіслав Богданович; Горик, Олексій Володимирович; Зiньковський, Анатолiй ПавловичItem Basic Stress-Strain State of a Multilayer Circular Ring under the Action of Mutually Opposite Normal Forces / Основное напряженно-деформированное состояние многослойного кругового кольца под действием взаимно противоположных нормальных сил(2019-03) Ковальчук, Станіслав Богданович; Горик, Олексій ВолодимировичItem Basic Stress-Strain State of a Multilayer Symmetric Circular Arch under the Action of Normal Forces in the Middle Section. Report 1. Arches of High Curvature / Аналітичний розв’язок задачі згину багатошарової симетричної кругової арки під дією нормальної сили у середньому перерізі. Повідомлення 1. Арки великої кривизни(2019-06) Ковальчук, Станіслав Богданович; Горик, Олексій ВолодимировичItem DETERMINATION OF ELASTOPLASTIC COEFFICIENT OF SHOCK INTERACTION OF SPHERICAL INDENTER WITH DEFORMABLE HALFSPACE(Eastern-European Journal of Enterprise Technologies, 2013-01) Горик, Олексій Володимирович; Ковальчук, Станіслав Богданович; Шулянський, Г. А.Erosive wear due to contact of metal surfaces with flying solid particles is a typical problem of machinery. The intensity of wear depends on the hardness of the material of wearing surface and the kinetic energy of moving solid particles. A measure of wear is associated with the parameters of the track left by a particle on the surface of parts. Thus the problem of linking of these components of the process of shock interaction of counter-bodies arises.On the basis of the elastoplastic model of shock interaction of a solid particle with a flat metal surface we have created a method of determining the coefficient, which characterized the elastoplastic properties of deformable half-space at dynamic imbedding of a spherical indenter in it. This allowed predicting the intensity of erosive wear. The coefficient was determined on the basis of existing or special laboratory results of studies of shock embedding of the indenter into prototypes, and on the basis of laboratory analytical calculations. This allowed us to summarize the available experimental data on the current input parameters of the considered process. The elastoplastic coefficient depends on the initial velocity and the diameter (mass) of attacking body and on the hardness of the material of the attacked half-space.Item 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 ВолодимировичItem 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 МиколайовичShot 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.Item 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 ВолодимировичItem Innovative Projects in the Industry 4.0 Sphere of Poltava State Agrarian University(MDPI: Engineering Proceedings, 2023-07-24) Muravlov, V. V.; Utkin, Y. V.; Sliusar, I. I.; Kopishynska, O. P.; Goryk, O. V.; Brykun, O. M.; Semenov, A. O. ; Bida, S. V.; Petrash, O. V.; Petrash, R. V.; Муравльов, Володимир Вячеславович; Уткін, Юрій Вікторович; Слюсарь, Ігор Іванович; Копішинська, Олена Петрівна; Горик, Олексій Володимирович; Брикун, Олександр Миколайович; Семенов, Анатолій Олексійович; Біда, Сергій Васильович; Петраш, Олександр Васильович; Петраш, Руслан ВасильовичThe activity of the “Industry 4.0 Implementation Center at PSAU” is aimed at the development and implementation of promising technologies, appropriate specialists training, implementation and management of informational and educational events, training management, and networking of enterprises: technology designers, production facilities, higher-education institutions, scientific institutions, state authorities, and civil groups. The latest projects that are being implemented are as follows: - Unified information platform for the management of material resources of territorial communities; - Segmentation of analog meter readings using neural networks; - Electrotechnical systems for bactericidal air disinfection; - Complex of shot blasting processing of metal products; - Groundwater level monitoring automation.Item Integral and differential relations for internal power factors in the bending of the bar with a curved flat axis of an arbitrary shape(Odessa State Academy of Civil Engineering and Architecture, 2018-03) Kovalchuk, S. B.; Goryk, O. V.; Ковальчук, Станіслав Богданович; Горик, Олексій ВолодимировичThe work is dedicated to the theoretical study of internal power factors in a curved bar with a flat axis of an arbitrary shape, that is in a plane bending condition by a surface load of an arbitrary type. The natural curvilinear cylindrical orthogonal coordinates associated with the structure of the bar and given by the characteristics of families of coordinate surfaces and Lame coefficients is used to describe the geometry of the bar and also the load distribution. The analysis of the equilibrium conditions of the elementary section of the bar made it possible to obtain integral relations between internal power factors and loads distributed on its longitudinal and end surfaces. The relations obtained were used to derive differential dependencies between internal power factors, that express the equilibrium conditions for the elementary section of a curved bar. Also, based on the equilibrium conditions of the bar cross-sections, integral relations between internal power factors and the stress state components were obtained. The presented integral and differential relations have a general form, invariant to the shape of the axis of the bar and allow to make a direct connection between loads and stresses. The results of the work can be used to solve theoretical and applied problems of a plane bending of curvilinear homogeneous and inhomogeneous bars with different types and combinations of external load.Item Maintenance of a loaded capability of reinforced concrete console girders of the VIP-grandstand at the stadium “Vorskla” in Poltava city(Державний науково-дослідний інститут будівельних конструкцій, 2018-02) Горик, Олексій Володимирович; Ковальчук, Станіслав БогдановичThe work is devoted to topical issues of a maintenance and renewal of a normal technical condition of constructional parts of the grandstand structure of the stadium “Vorskla” in Poltava city. The object of the research is reinforced concrete console girders of carcass frames of the stadium guest grandstand. Because of failed designing decisions connected with the reconstruction, these elements are practically at the end of their estimated reserve of loaded capability and require its improvement through arrangement of the construction strengthening. The optimal strengthening system in which the removal of the girder console part is limited by an additional elastic support with a preliminary compression force has been suggested. The transmission of the load estimated part to the elastic support of the strengthening system allowed to redistribute internal forces decreasing the estimated moment of flection on the supporting structure and in the bay avoiding a change of its sign. It is identified that in the process of the elastic element installment the intensity of the formed preliminary compression force will decrease by means of a girder secondary deflection. The estimates of its deflections taking into account a concentrated force formed by a working element of the strengthening system has been made for consideration of additional related deformation of the strengthening system and the girder. When identifying deflections, the reinforced concrete girder was considered as a composite discrete-heterogeneous bar made of homogeneous concrete matrix reinforced by very strong steel phases. It gave the possibility to take constitutive relation of the iteration movable model of the fold of composite discrete-heterogeneous bars as a basis of the reinforced girder deformation analysis under the conditions of limited deformation. General solutions of defining equations are received independently for each section of different stiffness. Received solutions at the stage of consideration of boundary conditions were adjusted by means of balancing of linkage and static deformation parameters at the edge of analyzing sections. Received amounts of deflections allowed to identify necessary constructive sizes of the strengthening system, with which the given level of the preliminary compression force in the working element is promoted in the designing position of the working element.Item 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 ВолодимировичThe 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.Item 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 ВолодимировичThe 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.Item Solution of a Transverse Plane Bending Problem of a Laminated Cantilever Beam Under the Action of a Normal Uniform Load(2018-05) Ковальчук, Станіслав Богданович; Горик, Олексій ВолодимировичItem Solution to the Task of Elastic Axial Compression–Tension of the Composite Multilayered Cylindrical Beam(2019-03) Ковальчук, Станіслав Богданович; Горик, Олексій Володимирович; Павліков, Андрій Миколайович; Антонець, Анатолій ВікторовичItem Solving the Problem of Elastic Bending of a Layered Cantilever Under a Normal Load Linearly Distributed over Longitudinal Faces(2020-01) Ковальчук, Станіслав Богданович; Горик, Олексій ВолодимировичItem Stability of Individual Phases in the Elastic Matrix of a Composite(2023) Goryk, O. V.; Kovalchuk, S. B.; Muravlov, V. V.; Skoriak, Yu. B.; Горик, Олексій Володимирович; Ковальчук, Станіслав Богданович; Муравльов, Володимир Вячеславович; Скоряк, Юлія БорисівнаA methodology for analytical stability assessment of individual compressed flexible phases of discretely heterogeneous composite elements of engineering structures is proposed to ensure their reliable safe operation and minimise the consequences of emergencies. Based on the energy balance equation for the proportional forces of a normal resistance of the medium to the phase displacement, expressions are obtained for determining the critical force, taking into account the possible initial curvature (non-rectilinearity) of a single phase in the elastic medium of the matrix for three possible cases of stability loss. The approbation of the results of the study on the example of deformation features of reinforcing bars in a compressed reinforced concrete column is presented.Item The problem of plane bending a direct composite beam of arbitrary cross-section and the prerequisites for its approximate analytical solution(2021-06) Ковальчук, Станіслав Богданович; Горик, Олексій Володимирович; Антонець, Анатолій ВікторовичItem Viscoelastic Resistance of the Surface Layer of Steel Products to Shock Attack of a Spherical Pellet(2020-09) Горик, Олексій Володимирович; Ковальчук, Станіслав Богданович; Брикун, Олександр Миколайович; Черняк, Роман Євгенович