Browsing by Author "Sukha, Iryna V."

Now showing 1 - 4 of 4
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    Calculation of the Probability of Test Object Compliance with the Specified Requirements and Non-Binary Decision-Making Rules
    (MM Publishing s.r.o., Praha, Czechia, 2024) Rimar, Miroslav; Fedak, Marcel; Kulikov, Andrii; Bilonozhko, M. V.; Rudko, K. V.; Martynova, V. V.; Yeromin, Oleksandr O.; Savvin, Oleksandr V.; Sukha, Iryna V.; Krenicky, Tibor
    ENG: The probability of test object compliance with the specified requirements and non-binary decision is a measure of how likely the test object is to meet the criteria for acceptance or rejection based on multiple factors. It is necessary to calculate by using a valid mathematical model that takes into account the test object's characteristics, the test conditions, the test criteria, and the uncertainty of the measurements. The significance of the probability of test object compliance with the specified requirements and non-binary decision can help to evaluate the quality, reliability, and performance of the test object, as well as to support decision making in complex situations.
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    Carbon Plastics for Reusable Hypersonic Flight Vehicles
    (Ukrainian State University of Chemical Technology, Dnipro, 2024) Kazakevich, M.; Husarova, I.; Kazakevich, V.; Manko, T.; Khoroshylov, V.; Kozis, K.; Osinovyy, G.; Sukha, Iryna V.; Zaichuk, Oleksandr V.
    ENG: The development of hypersonic unmanned aerial vehicles (UAVs) for aerospace systems presents ambitious challenges for scientists and engineers. Extreme flight conditions, such as ultra-high speeds and significant aerodynamic heating, necessitate the creation of new materials capable of withstanding such loads. One of the most promising materials for constructing hypersonic UAVs is carbon fiber-reinforced polymer based on bisphenol nitrile. This material exhibits high thermal resistance, chemical stability, and excellent mechanical properties. Utilizing bisphenol nitrile combined with carbon fibers has enabled the production of composite materials that can operate at temperatures exceeding 300 оC, far surpassing the capabilities of traditional polymer matrices. To assess the suitability of the developed carbon fiber-reinforced plastic for hypersonic UAV applications, comprehensive studies of its physical, mechanical, and thermal characteristics were conducted across a wide temperature range from 20 to 300 оC. The obtained results provided a detailed characterization of the composite and allowed for comparisons with other high-temperature composite materials. The developed carbon fibre-reinforced plastic based on bisphenol nitrile binder shows great promise for constructing hypersonic UAVs. Its high thermal resistance, combined with excellent mechanical properties, makes it suitable for use in the extreme temperature conditions typical of hypersonic flight.
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    Production of Fiberglass Plastics Using Infrared Heating
    (Український державний хіміко-технологічний університет, Дніпро, 2025) Manko, T.; Husarova, I.; Kozis, K.; Sukha, Iryna V.; Zaichuk, Oleksandr V.; Sukhyy, Kostyantyn M.
    ENG: This study analyzes the technology for creating polymer composite materials reinforced with glass fiber. Particular attention is given to their applications in the aerospace industry, where stringent requirements for strength, corrosion resistance, and specific strength render these materials indispensable. The main components of composite materials and their properties are examined. Phenol-formaldehyde resins, widely utilized as a matrix for fiberglass plastics in rocket and space engineering, are studied in detail. The thermomechanical resistance of composites, a critical factor determining their performance under extreme conditions, is highlighted. A significant part of the study focuses on the production and curing processes of composite materials. Various curing methods are analyzed, with a focus on the effectiveness of infrared radiation. The findings establish that infrared heating significantly enhances the physical and mechanical properties of composites while reducing production time.
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    Thermodynamic Analysis of the Reactions of Strontium Anorthite Formation during the Firing of Thermal Shock Resistance Ceramics Based on the Eutectic Glasses of the SrO–Al2O3–SiO2 Systems
    (Ukrainian State University of Chemical Technology, Dnipro, 2023) Zaichuk, Oleksandr V.; Sukhyy, Kostyantyn M.; Amelina, O. A.; Hordeieiv, Y. S.; Filonenko, D. V.; Rudnieva, L. L.; Sukha, Iryna V. ; Halushka, S. A.
    ENG: Thermal shock resistance ceramic materials must have a high degree of sintering to ensure the required mechanical strength, erosion resistance, and resistance to high-temperature oxidation. However, the search for effective ways to achieve a high degree of sintering of ceramic materials based on the SrO–Al2O3–SiO2 system at low temperatures requires a large amount of experimental research. The aim of this work is to analyze thermodynamically the reactions of strontium-anorthite phase formation at the points of triple eutectics of the SrO–Al2O3–SiO2 system under low-temperature firing conditions. The eutectic points were selected in the region of strontium anorthite crystallization and had a temperature not exceeding 14000C. It has been established that in the case of compliance with the stoichiometric ratio, the final product of the interaction of the components of eutectic glasses S-1 and S-2 with the charging components is the strontium anorthite phase. The most probable is the formation of strontium anorthite in the interaction of eutectic glass components with Al2O3∙2SiO2, which is a product of kaolinite dehydration (Al2O3∙2SiO2∙2H2O). It has been found that the compounds SrO∙SiO2 and 2SrO∙Al2O3∙SiO2 are most active in the interaction with the charging components in the direction of formation of the strontium anorthite phase than SiO2 tridymite. As a result, the sintering of strontium-anorthite compositions at a temperature of 9000C causes a significant increase in the content of the crystalline phase of strontium anorthite. The determined patterns allow making a reasonable choice of glass in the SrO–Al2O3–SiO2 system for the further manufacture of low-temperature strontium-anorthite ceramics.