Izvestiya of Samara Scientific Center of the Russian Academy of Sciences

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Current Issue

Vol 25, No 3 (2023)

Articles

To determine the stress-strain state during incremental forming
Petrov I.N.
Abstract

In this article, based on the experimental studies carried out, the scheme of the stress-strain state of workpieces during incremental forming is determined. It is determined that the incremental forming of a cone with a rectilinear generatrix is characterized by biaxial stretching with a predominance of tensile axial deformations.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):5-9
pages 5-9 views
Investigation of the process of forming the transversal corrugation of bellows with minimum difference in thickness
Antipov D.V., Sharov A.A., Maslennikova A.S.
Abstract

In the article, studies were carried out to determine the possibility of confirming the hypothesis put forward about obtaining a more uniform bellows wall in the region of the corrugation top by shaping the bellows with an elastic medium in a two-stage method in a detachable sectional matrix using constrained bending technology. A description of the areas of application of bellows, their designs is given, the most advanced methods of manufacturing bellows and their main drawback are identified. The purpose of the study is defined and the corresponding tasks that need to be solved are set. The study used analytical research methods and finite element modeling. A method for shaping the bellows and the geometry of the shaping matrix are proposed. A technique for calculating the parameters of the technological process for two stages of bellows shaping is given. Pictures of the relative change in the thickness of the bellows corrugation during shaping in the traditional way and when shaping by the proposed method are presented. The distribution fields of equivalent stresses according to Mises are presented at the first and second transitions during shaping by the proposed method. A comparison is made and an assessment of the obtained results is given.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):10-15
pages 10-15 views
Development of a model for improving the quality control system of coloring pigment powder particles
Komarov T.I., Puzyreva V.S., Chabanenko A.V.
Abstract

Problem Statement (Relevance). Most often, the production of paints and varnishes consists of the main stages: from receipt to warehouses to packaging in boxes. And quality control is carried out at the entrance and at the exit. However, in the production of paints and varnishes, it is necessary to introduce intermediate control at the stage of grinding pigment raw materials into finely ground powder, since the main qualities of the finished paintwork product depend on the size range of particles of the finely ground powder. GOST 2093-82 recommends the use of sieve analysis, which is a sieving mechanism with a sieve from the largest mesh sizes to the smallest. However, this method is inferior to more modern ones in terms of analysis speed by more than 10 minutes, in terms of particle measurement range by 10-30%, and in terms of information content of the analysis. Objectives. Improving the quality of paints and varnishes through the introduction of intermediate control by laser diffraction. Methods Applied. In the presented work, methods such as mathematical modeling, the method of idealization and formalization of the research processes of paints and varnishes were applied. Originality. In the course of the work, new mechanisms were developed for assessing and controlling the quality of the particles of the coloring pigment powder, as well as new ways to improve the efficiency of the production of paints and varnishes. In the course of the study, an analysis of the technological process was carried out. Result. The result of the work was the developed model for improving the quality control system for the particles of the coloring pigment powder. Practical Relevance. The developed model will increase the effectiveness of current processes for the production of paints and varnishes through the introduction of intermediate control, which will increase the profit of the organization and reduce quality costs.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):16-25
pages 16-25 views
Assessment of risks and potential failures in the design of the manufacturing process of flexible wave gear wheels based on the PFMEA methodology
Nazarov D.V., Antipov D.V., Lomovskoy O.V.
Abstract

The article presents a model for assessing the risks of potential failures of the machining process of flexible wheels of wave gears (WG). The constructed model is based on the methodology for analyzing the types and consequences of potential process inconsistencies (PFMEA). Structural, functional analysis and analysis of failures arising in the process of turning, grinding and cutting the teeth of a flexible wheel are carried out. As a result of the analysis, a risk assessment was carried out and a list of measures aimed at improving the quality of the machining process of flexible wheels of the WG was established.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):26-34
pages 26-34 views
Development and application of a simulation model for a compounding process for motor gasolines
Golovina E.S., Khaimovich I.N.
Abstract

Compounding commercial fuels is an important final stage of the entire production process chain in an oil refinery which defines the economic effectiveness of the company's manufacturing activities. This paper addresses a simulation model for the compounding process for commercial gasolines. The Model is based on discrete linear programming. The target function for the optimization model is the ratio of the difference between the value of the salable product and the costs incurred by manufacturing components and electrical power to the final volume of the salable product, as well as the time it takes to prepare. The optimization model leads to the conclusion about the practicability of the in-flow blending, as well as of the necessity of selecting the right pumping equipment. The optimization model can be applied to primary calculations of economic effectiveness of the various options of organizing the process for the compounding of commercial gasolines.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):35-42
pages 35-42 views
Visualization of the static-dynamic process of compaction of a powder composition in a metal shell
Glushchenkov V.A., de Alvarenga R., Belyaeva I.A.
Abstract

The paper considers a hybrid technology of compaction of a powder composition (PC) in a metal shell: drawing and pulse-magnetic crimping. А technique of computer simulation of such static-dynamic process has been developed. Based on the simulation results, a visualization picture of the process of deformation of the pipe and the powder composition contained in it has been developed. The resulting visualization picture of the process made it possible to describe step-by-step the compaction mechanism and its dependence on the degree of deformation of the pipe during drawing and on the value of the energy of pulse-magnetic crimping. The achieved packing density, which characterizes the quality of compaction, has been determined. The results of the work are used in design of a new technology.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):43-49
pages 43-49 views
Optimization of spare parts supply system for production divisions of airport network
Romanenko V.A., Koltsov I.V.
Abstract

The problem of optimal design of the spare parts supply system for the baggage handling systems of a group of airports is solved. It is assumed that the airports belonging to the group will be equipped with baggage systems of one manufacturer, which will supply them with spare parts during the operational phase. One of the airports will function as a passenger transfer center (hub) for a hub-forming airline, which will organize mass transfer flights between the airports of the group. The proposed system will consist of a tiered system for spare parts supply, including warehouses at the manufacturer's, hub airport and other (peripheral) airports, and a combined strategy of spare parts supplies, including periodic supplies from the manufacturer's warehouse to the warehouses of airports, on-line supplies from the hub warehouse to the warehouses of peripheral airports, and, in case of deficit, on-line supplies to the hub airport's warehouse. The aim of the solution of the problem is to determine the volume of spare parts production which is optimal by the criterion of minimum costs of production, storage and stock replenishment. The results of model examples, testifying to the validity of the considered statement of the problem and efficiency of the proposed system of spare parts supply, are presented.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):50-56
pages 50-56 views
Development of the method on the stress-strain state assessment of products taking into account technological heredity
Evdokimov D.V., Aleksencev A.A., Bukaty A.S., Ahtamjanov R.M., Bychkov D.A.
Abstract

The article presents a technique that allows assessing the stress-strain state of products both at the stages of technological operations and upon completion of the manufacturing process. The technique is based on a finite element model, which makes it possible to obtain stress and strain fields depending on the loaded diagrams of residual stresses that are formed during the process of the technological operation under study. Thus, the developed technique can serve as an effective tool for optimizing technological operations, and hence the technological process as a whole. As an example, the paper considers the optimization of the technological process of the front support traverse of a domestic advanced aircraft. As a result of using the presented methodology, it turns out to determine the most advantageous modes of processing the problem area of the traverse, which made it possible to increase the working life of the part to the required value.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):57-63
pages 57-63 views
Air channel cooling of one-turn inductor for electromagnetic metal forming
Samokhvalov V.N., Chernikov D.G., Yusupov R.Y.
Abstract

This paper evaluates the efficiency of cooling a coil, fitted with an internal channel, for a one-turn inductor for electromagnetic metal forming, using a low-temperature air from a vortex tube, with and without an ejector. The experiment data shows that at constant pressure on the vortex tube entrance the highest cooling efficiency and intensity are reached at values β>1, where β is an ejector diaphragm to nozzle section area relation. The results show that air channel cooling of a coil for a one-turn inductor using air from vortex tube has considerably high efficiency and high safety parameters.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):64-71
pages 64-71 views
Technological residual deformations calculating for aviation parts subjected to shot peeneng strenghtening
Bukaty A.S., Evdokimov D.V., Bychkov D.A., Marwan S., Saraev A.S.
Abstract

Ensuring the geometric accuracy of critical parts is an actual problem for aviation industry enterprises. The blades of gas turbine engines are particularly critical and technologically complex parts. In most cases, the interlocks of the blades, as well as the blade, are subjected to surface shot peening. Residual stresses are the first cause of the appearance of technological residual deformations. It is the residual deformations caused by the action of residual stresses that in most cases are the cause of critical defects of parts. Thus, the development of scientifically based approaches to modeling residual stresses and calculating technological residual deformations is an actual task. The paper presents an approach that allows at the stage of machining to take into account the deformations that can be obtained at the final stages of manufacturing parts after shot peening strengthening. The approach is based on preliminary computational prediction of technological residual deformations from the action of residual stresses based on analytical and finite element methods. The implementation of the approach is shown on the example of a compressor blade of a gas turbine engine, subjected to hardening by shot peening over the entire surface of the part.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):72-76
pages 72-76 views
Methodology for assessing resource-saving production systems in a circular economy
Minulina O.V.
Abstract

In the new conditions of conducting production and economic activities, the importance and relevance of increasing the resource efficiency and environmental friendliness of production processes is increasing, which, within the framework of the concept of sustainable development and the ESG agenda, is of critical importance for petrochemical enterprises. At modern industrial enterprises, there is an urgent need to design and implement closed production cycles in management processes that increase the resource efficiency of production and industry as a whole. The purpose of the article is to develop a conceptual model for managing the process of transition of petrochemical enterprises to a closed cycle. The object of the study is petrochemical enterprises, the subject is production cycles. The objectives of the article are as follows: to describe the methodology for developing a management model for the process of transition of petrochemical enterprises to a closed cycle; present a description of a waste-free closed production process; build a design scheme for an absolutely closed or waste-free technological cycle. The results of the study made it possible to systematize the following conclusions: 1) a closed production cycle is proposed to be understood as a form of organizing the production of petrochemical products, in which production resources (raw materials, energy) are used repeatedly in the production process, having previously undergone cleaning, tooling, cooling, etc., returning the required quality of the production resource within the framework of this production technology with its subsequent entry to the first or previous stages of the value chain; 2) the specificity of the organization of a closed cycle in the petrochemical industry is associated with the formation of a significant amount of by-products during the main chemical process, which makes it possible to obtain by-products that can also be used in value chains (for example, mineral fertilizers, sulfuric acid, etc.). P.); 3) the advantage of chemical recycling is the possibility of processing mixed, multi-component and contaminated waste, as well as obtaining secondary raw materials that are practically indistinguishable in properties from the original primary raw materials, resulting in an unlimited number of processing cycles; 4) the basis of the conceptual model for managing the process of transition of petrochemical enterprises to a closed cycle is such management elements as the goal, criteria, subject and object of management, methods and tools of system engineering; problems of reorganization of production processes, as well as tasks and technologies for the transition to closed production processes. The theoretical significance of the study lies in the systematization of the conceptual foundations for managing the process of transition of petrochemical enterprises to a closed cycle, which will allow in further scientific research to develop practical aspects of managing the closure of production cycles, the transition to waste-free production at the micro level.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):77-83
pages 77-83 views
Probabilistic calculation and statistical tool for assessing the influence of a technological process on the stability of the main electrical characteristics of a vehicle generator
Saxonov A.S., Kozlovsky V.N., Kireev K.V.
Abstract

The article presents the results of the development of probabilistic calculation and statistical tools for assessing the impact of the stability of the technological process of manufacturing an automobile generator on the variability of its electrical characteristics.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):84-89
pages 84-89 views
Conceptual model of the digital plant of manufacturing enterprises in the aerospace industry
Tkachenko I.S., Antipov D.V., Kupriyanov A.V., Smelov V.G., Kokoreva V.V.
Abstract

The article discusses the conceptual model of a digital factory of an aerospace manufacturing enterprise, describes the key elements and their relationship.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):90-106
pages 90-106 views
Thermodynamic model of ice collar for hydrotechnical construction
Sharapov D.A., Klochkov Y.S.
Abstract

Arctic development is one of the priorities for the country. For this, it is necessary both to develop new normative documentation on standardization and to improve existing norms and standards. The Arctic region is complex in terms of weather and environmental conditions. Environmental loads and actions on hydraulic structures are most important and primarily include impacts from ice. Ice impacts can be of a very different nature and therefore are not fully reflected in the normative documents. The formation of an ice collar is one of the types of freezing on the submerged hydraulic structures. Ice collar is a thicker ice around structure due to the high thermal conduction through the structure. This ice is formed due to the heat flow through the body of the structure and can be calculated. Analytical calculation of the ice collar is difficult to perform, so it is proposed to use a thermodynamic model for numerical simulation.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):107-113
pages 107-113 views
Successive approximation method based on local approximation of the reachable set for discrete optimal control problems
Baturin V.A., Daneev A.V., Sizykh V.N.
Abstract

An improvement algorithm based on local approximations of the reachable set of a time-discrete optimal control problem is considered. Conditions are obtained that ensure the relaxation of the algorithm and the connection with the necessary optimality conditions.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):114-129
pages 114-129 views
Simulation and comparison of the results of the exact analytical solutionof the boundary problem of a flow in a thin layer with experimental data
Yanovskaya E.A.
Abstract

Many technological processes of metal forming include deformation of an elongated workpiece by approaching tools, the contact surfaces of which have shallow grooved cavities. A common special case are stamps or part of their contact surfaces, which are planes: sites for draft and some types of harvesting streams. The article is devoted to mathematical modeling of the flow of a thin metal layer over rough surfaces. The article presents the results of an analytical study of the boundary value problem of the viscoplastic flow of a thin layer of metal located between thin rough plates moving towards each other. Exact solutions based on the classical formulation in the framework of an "ideal fluid" and "viscoplastic fluid" are given. A real experiment is described for assessing the effect of shear stresses averaged over the layer thickness on the kinematics of the flow of a plastic layer. In order to assess the effect of shear stresses averaged over the layer thickness on the flow kinematics, and, in particular, near fixed boundaries, experiments were carried out and the results on settlement between converging rigid plates of a thin plastic sample bounded by fixed walls and initially having the shape of a rectangle in plan are analyzed. . The fixed walls of the tool are located along the long sides of the rectangle. Experimental regularities have been established. Spreading of samples occurs as expected, i.e., along straight streamlines parallel to the long side of the rectangle, or along the rays of a circular sector. It was found that the longitudinal displacements near the immovable walls noticeably lag behind the displacements far from the boundary, and the maximum displacements are observed on the line of symmetry of the sample with respect to the immovable walls. This fact indicates the presence of nonzero shear stresses and (velocities) of deformations in the considered flows of a thin plastic layer. Comparison of the obtained experimental and analytical simulation results allows us to evaluate the correctness of the chosen mathematical model, which can be used to describe the flows.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):130-139
pages 130-139 views
On the choice of a mathematical model for the correct solution of the boundary value problem of the flow of a thin layer of plastic material under compression of a sample in the form of a circular sector
Yanovskaya E.A.
Abstract

The class of flow problems for a relatively thin layer of plastic metal includes most of the practical problems of rolling and forging and stamping production. With the difference that during rolling, rolling, rotary drawing and other similar processes, the deformation zone is localized, and in stamping processes, the entire volume of metal is redistributed in the cavity of the stream, flowing into its various elements, forming the necessary shape of the forging, often the shape is elongated and of small thickness. It is natural to believe that the same mathematical models can be used for the analysis of processes close in kinematics, but in different formulations. The article substantiates the choice of a mathematical model for the theoretical solution of the boundary value problem of constrained compression of a sample in the form of a circular sector based on the results of the experiment. The article presents the results of an analytical study of the boundary value problem of the viscoplastic flow of a thin layer of metal located between thin rough plates moving towards each other. Exact solutions based on the classical formulation in the framework of an "ideal fluid" and "viscoplastic fluid" are given. A real experiment is described for assessing the effect of shear stresses averaged over the layer thickness on the kinematics of the flow of a plastic layer. Comparison of the obtained experimental and analytical simulation results allows us to evaluate the correctness of the chosen mathematical model, which can be used to describe the flows. When designing and introducing into production most high-performance technological processes for processing materials by pressure, not only the numerical values of technological parameters are required, but also the prediction of the behavior of the material during loading. At present, problem-oriented software systems are available based on numerical methods for solving, for example, the finite element method (FEM), various problems of continuum mechanics (MCS). However, without the development of fundamental approaches to the formulation, schematization and analytical solution of boundary value problems, it would hardly be possible to create reliable mathematical models for modern computer systems. Therefore, the further development of theoretical approaches to solving boundary value problems of the MSS is relevant.

Izvestiya of Samara Scientific Center of the Russian Academy of Sciences. 2023;25(3):140-146
pages 140-146 views

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