Global Energy

RAR RUS 5-20 Mannanov E. Galunin Sergei DESIGNING INDUCTION COILS FOR DISKS HEATING In this study, the authors search for the universal inductor design to provide uniform local heat treatment of simple and complex profile disks, in particular, for the most demanded standard siz-es of truck diaphragm springs. New research data have been obtained for various sizes of metal disks. The influence of geometric, electrical and positional parameters on the temperature distri-bution of the product under consideration during its electromagnetic heat treatment was re-vealed. The dependence of temperature on the dimensions of the heated object, the number and length of the fingers of the diaphragm spring, the influence of the finger bend zone on the final temperature profile were studied too. The results of the research and development work are aimed at reducing design costs for the manufacture of inductors for each standard size of truck diaphragm springs and at increasing the efficiency of the heating process by controlling the oper-ating mode. doi.org/10.18721/JEST.28101 537.856 induction heating numerical simulation induction coil heat treatment finite element method diaphragm spring https://engtech.spbstu.ru/article/2022.119.1/ Mannanov%2C-Galunin-(2).pdf

REV RUS 21-31 Vasilyeva Elena Vasilyeva Alina Kychkin Anatoliy ON THE METHODS OF STUDYING THE IMPACT OF MOISTURE ON POLYMERIC COMPOSITE MATERIALS The study of the influence of moisture on the properties of polymer composite materials has been drawing attention to this day. The negative impact of moisture on the strength and performance properties is the factor, the forecast of which is necessary to ensure the reliability and durability of polymer composite materials. This review considers methods for determining moisture absorption and diffusion in polymer materials with fibrous (woven) fillers based on epoxy resin; current domestic and foreign standards for determining moisture content in polymer composite materials; methods for determining and assessing the effect of absorbed moisture on polymer composite materials, including conditions of operation and manufacturing processes (curing state). The data on the influence of climatic factors on polymer composite materials for the last couple of years are briefly presented. The review will be useful for researchers dealing with the problem of moisture absorption and water absorption by composite materials in the form of a generalization of the accumulated knowledge on this topic in order to analyze the long-term behavior of polymer materials. doi.org/10.18721/JEST.28102 67.017 polymer composite materials moisture water sorption absorption diffusion climatic tests regulatory documentation https://engtech.spbstu.ru/article/2022.119.2/ Vasileva%2C-Vasileva%2C-Kichkin.pdf

RAR RUS 32-42 Bouamama Mohamed Elmeiche Abbes Belhadj Bachir Boulenouar Mohamed El Haddaoui MAINTENANCE OF DRILLING MACHINES USING PARETO ABC METHOD Under the pressure of global competition, production facilities have seen their performance grow steadily. The machines are highly demanded, the speed of rotation and the operating time increase. This results in increased damage and breakdowns, which lead to unscheduled shutdowns. The costs of downtime are in these cases significantly higher than the costs of repair and overhaul. The prevention of machine damage is therefore of great economic significance to every business. Preventive maintenance leads to ensuring the continuity of industrial production by controlling the anticipation of the consequences of faults and by ordering their repair in a timely manner so that they do not affect the functioning of rotating machines. The objective of this work is to statistically analyze failures in the machine shop with ABC method and to select the critical machine. A maintenance plan has also been drawn up for the development that addresses the major problem that is the optimized reduction in downtime of the radial drilling machine (NKH45), given the importance of this production equipment to level of manufacturing activity. This method of reliability-based maintenance (RBM). doi.org/10.18721/JEST.28103 62 Maintenance Radial drilling reliability history of interventions Pareto ABC method https://engtech.spbstu.ru/article/2022.119.3/ Bouamama%2C-Elmeiche%2C-Belhadj%2C-Boulenouar-(na-angl_).pdf

RAR RUS 43-66 Sokolov Yuriy s5577@inbox.ru AUTOMATED PRODUCTION SYSTEM OF ARGON ARC WELDING IN A CONTROLLED ATMOSPHERE The paper shows the possibility of creating a modern control system linking an industrial computer, a CNC device, a programmable controller, digital and analog measuring instruments into a single information space, which ensures the production of a welded joint with a required structure and properties. A principle is proposed for creating a single digital platform combining the fields of design and numerical calculations based on an object-oriented approach that provides support for system engineering processes, starting with conceptual design and up to the later stages of the system lifecycle. Integration of technological, design, calculation and operational processes based on CASE technology allows you to automate the development process as much as possible ensuring the absence of errors and ease of software products maintenance. Microprocessor devices and local area networks provide an opportunity to create integrated technological data processing systems. doi.org/10.18721/JEST.28104 621.791:681.5.01:669.17 welding production automation object-oriented approach structure of alloys properties of materials https://engtech.spbstu.ru/article/2022.119.4/ Sokolov.pdf

RAR RUS 67-77 Strizhius Vitalii COMPARISON OF FATIGUE STRENGTH CHARACTERISTICS OF VKU-18TR CARBON NANOCOMPOSITE AND KMU-4-2M-3692 CARBON FIBER COMPOSITE When carbon fiber plastics are modified with carbon nanoparticles, it is particularly important to evaluate the effectiveness of such modification in terms of increasing the mechanical properties compared to the analog. Of particular interest is the comparison of the fatigue strength characteristics of modified carbon fiber plastics and analogs, since it is these characteristics that determine the performance qualities of materials. The strength properties of VKU-18tr carbon nanocomposite and its analog, KMU-4-2m-3692 carbon fiber, are considered. It is noted that there is no detailed comparison of the key fatigue strength characteristics of these plastics in open publications. In order to conduct such a comparison, three methods and three types of comparison were chosen: comparison of the fatigue life of materials with a symmetrical loading cycle; comparison of the fatigue life of materials until a certain level of degradation of residual strength is reached; comparison of the fatigue life of materials until a certain level of degradation of stiffness is reached. Despite the certain conditionality of the comparisons, a significant advantage of the main characteristics of the fatigue strength of the VKU-18tr carbon nanocomposite compared to its analog, KMU-4-2m-3692 carbon fiber, is noted. The superiority quotas reach values of 125–536%. It is obvious that such an advantage can be an extremely important property in the design of particularly critical power elements of structures (for example, composite wing panels of aircrafts). doi.org/10.18721/JEST.28105 629.7.023 carbon fiber plastics carbon nanoparticles S-N curves degradation of residual strength degradation of stiffness https://engtech.spbstu.ru/article/2022.119.5/ Strizhius.pdf