Relevant bibliographies by topics / Сферопластики

Academic literature on the topic 'Сферопластики'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

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Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Сферопластики.'

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Journal articles on the topic "Сферопластики"

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Садовничий, Д. Н., Ю. М. Милехин, С. А. Малинин, Т. Л. Вихорнова, А. Н. Осавчук, В. П. Мельников, К. Ю. Шереметьев, and Н. В. Перцев. "Изменения диэлектрических и механических свойств сферопластика, содержащего металлизированные стеклянные микросферы, вызванные деформацией сжатия." Журнал технической физики 90, no. 7 (2020): 1121. http://dx.doi.org/10.21883/jtf.2020.07.49445.384-19.

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Представлены экспериментальные результаты изменений диэлектрических и механических характеристик сферопластика на основе кремнийорганического эластомера и металлизированных стеклянных микросфер, вызванных статическим и ударным сжатием. Установлено наличие двух областей частотной дисперсии диэлектрической проницаемости, связанных с наличием металлического покрытия микросфер. Обнаружено, что при относительной деформации сжатия не менее 70% наблюдается резкое снижение как низкочастотной, так и высокочастотной дисперсии комплексной диэлектрической проницаемости. Обсуждены возможные причины обнаруженного изменения комплексной диэлектрической проницаемости. Ключевые слова: сферопластик, микросферы, диэлектрические характеристики, механические характеристики.
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Chukhlanov, Vladimir Yu, Kirill V. Smirnov, and Natalia V. Chukhlanova. "Reduced density spheroplastic based on hollow phenol-formaldehyde microspheres and epoxy resin." Butlerov Communications 58, no. 4 (April 30, 2019): 98–101. http://dx.doi.org/10.37952/roi-jbc-01/19-58-4-98.

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In this article the physical-mechanical, thermal and electrical properties of spheroplastic based on epoxy resin ED-20 and hollow phenol-formaldehyde microspheres were studied. The samples were obtained by mixing an epoxy resin, cured with polyethylene polyamine, with hollow phenol-formaldehyde microspheres, poured into a mold and then cured at room temperature. The influence of the filler on the kinetics of the interaction of epoxy oligomer and aliphatic polyamine was studied. The effect of reducing the time of gel formation may occur due to the possible presence of reactive groups on the surface of microspheres. The experiments showed that the introduction of hollow phenol-formaldehyde microspheres in General leads to a slight decrease in the gel formation time. It is established that the introduction of hollow microspheres into the composition leads to a decrease in the density of the finished composition. The impact strength of spheroplastic was determined in accordance with GOST 4647-2015 "Method of Charpy impact strength determination" (ISO 179-1: 2010, NEQ). The introduction of hollow microspheres into the composition leads to a change in the impact strength of the composition in the direction of its decrease. A similar trend is observed in the study of the strength in the separation from the substrate of different materials. The coefficient of thermal conductivity was determined in a stationary mode on the device ITP-MG4"100" GOST 7076-99 "Method for determining the thermal conductivity and thermal resistance in a stationary thermal regime." Studies have shown that an increase in the content of hollow microspheres in the composition to 15% leads to a gradual decrease in the thermal conductivity coefficient to 0.74 W/m∙K. The studied materials can be used as thermal insulation materials and for the manufacture of products used in various fields of science and technology.
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Lebedev, V., V. Kosulnikov, P. Sery, S. Troshkin, A. Logunova, and A. Lysenko. "Simulation of polymerization scenarios for large sphere-plastic blocks." Transactions of the Krylov State Research Centre 4, no. 390 (November 26, 2019): 67–84. http://dx.doi.org/10.24937/2542-2324-2019-4-390-67-84.

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Dodonov, P. А. "Statistical approach to description of stressed state of syntactic foam microstructure." Transactions of the Krylov State Research Centre 2, no. 400 (May 16, 2022): 40–50. http://dx.doi.org/10.24937/2542-2324-2022-2-400-40-50.

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Object and purpose of research. The object of research is a composite material of the syntactic foam type (SF), which forms a heterogeneous medium consisting of a polymer matrix filled with spherical inclusions- micro spheres. The paper suggests that distribution of micro spheres in SF should be used as a qualitative measure for estimation procedures. Comparison of such distribution for various models can be used for explaining the SF efficiency estimations. Materials and methods. The initial data inputs for the study were the composition and structure of syntactic foam and characteristics of its components: polymer matrix and glass micro spheres. Numerical studies were carried out using the earlier developed structural model of SF deformation and damage. The structural model assesses the stressed-strained state of large micro sphere assemblies (models with a number of spheres about 105 are used in the study). Results obtained by the model let us use statistical methods of processing the stress raisers and identify patterns of distributions for predicting the SF strength. The results are verified by comparison with estimations by finite element models. Main results. The structural model of deformation and damage is highly effective in calculation of the stressed-strained state of micro structures with a number of micro spheres of about 105 and more. Conclusion. The structural model developed for SF makes it possible to accurately assess the stresses of its components under external hydrostatic pressure considering a large number of micro spheres. The results show excellent convergence of the stressed-strained state estimates with detailed estimations by FE models. With accurate data on the stressed-strained state of micro structure one can predict how the damage would develop and calculate the process to failure and full loss of buoyance.
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Kovalenko, A. V., N. K. Sidelnikov, I. I. Sokolov, and K. O. Tundaykin. "SPHEROPLASTIC WITH ADJUSTABLE VISCOSITY FOR FILLING SECTIONS OF HONEYCOMB STRUCTURES." Proceedings of VIAM, no. 11 (2019): 37–43. http://dx.doi.org/10.18577/2307-6046-2019-0-11-37-43.

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Dodonov, P., and A. Ryzhkin. "Analytical study on stability of microspheres in syntactic foams structure under hydrostatic compression." Transactions of the Krylov State Research Centre S-I, no. 2 (December 28, 2020): 119–24. http://dx.doi.org/10.24937/2542-2324-2020-2-s-i-119-124.

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This paper analyses prediction methods for failure pressure of microspheres in the structure of syntactic foams, discussing several micromechanical models. The solutions were obtained as per linear elasticity theory and finite-element method. It was investigated how geometric and physical & mechanical characteristic of syntactic foams depend on its components. Pressure failure is much lower if the boundary of the medium is close to the inclusions. This paper suggests an analytical model that yielded conservative estimate of critical pressure for microspheres.
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Dodonov, P. "Effect of porosity and microstructure damage on mechanical properties of polymeric syntactic foam." Transactions of the Krylov State Research Centre 1, no. 399 (March 15, 2022): 65–74. http://dx.doi.org/10.24937/2542-2324-2022-1-399-65-74.

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Object and purpose of research. This paper discusses syntactic foam, a polymeric composite material of heterogeneous composition (polymeric matrix with microspherical inclusions). The purpose of this study was to analyse the data obtained for the structural model of this material, as well as the results of FEM simulations, with comparison between the two. Materials and methods. The inputs for this study were composition and structure of syntactic foam and properties of its components (polymeric matrix and glass microspheres). Main results. Structural model of syntactic foam straining and failure made it possible to estimate how strength and reliability of the entire material depends on the properties of its components. Conclusion. The study yielded analytical expressions for effective properties of syntactic foam taking into account structural defects and porosities.
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Fedonyuk, N., and P. Dodonov. "Structural model of heterogeneous material (microsphere foam) straining and failure under hydrostatic loading." Transactions of the Krylov State Research Centre 2, no. 396 (May 21, 2021): 37–51. http://dx.doi.org/10.24937/2542-2324-2021-2-396-37-51.

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Object and purpose of research. The paper investigates polymeric composite material of syntactic foams type being by nature a heterogeneous medium and consisting of polymeric matrix, filled with spherical inclusions: microspheres. The main purpose of this this paper is to develop a structural model of straining and failure for this type of materials under hydrostatic pressure and software and mathematical apparatus for model implementation. Materials and methods. The input data for this research were composition and structure of syntactic foam material as well as the performance of its components (polymeric matrix and glass microspheres). Structural model was developed on the basis of solutions to linear elasticity theory problems using Lubachevsky – Stillinger algorithm for the formation of structure, homonization methods, etc. A calculation algorithm implemented in code in the С++ language was developed on the basis of the designed mathematical apparatus. Verification of calculation results was carried out by comparison with failure test results of samples of one of the grades of syntactic foam under short-term hydrostatic pressure loading. Main results. Structural model of syntactic foam type material straining and failure under hydrostatic pressure was developed. A calculation algorithm implemented in program code written in the С++ language which is relatively highly efficient for analysis of real structures with a large number of microspheres of the order of 105. Correlation with experimental results showed compatibility of modelling results in terms of both quantitative and qualitative estimates. Conclusion. The developed structural model allows with a high degree of confidence to describe the processes of damage and failure accumulation in syntactic foam under hydrostatic pressure. For practical purposes the model can be used applied for prediction of syntactic foam performance (strength, bulk strain and buoyancy), based on the properties of the initial components – microspheres and polymeric matrix.
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Dissertations / Theses on the topic "Сферопластики"

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Соломонюк, Н. С. "Блоки плавучести повышенной теплостойкости из пеностекла для необитаемого подводного аппарата «Аргобуй»." Thesis, 2013. http://eir.nuos.edu.ua/xmlui/handle/123456789/1168.

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Соломонюк, Н. С. Блоки плавучести повышенной теплостойкости из пеностекла для необитаемого подводного аппарата «Аргобуй» / Н. С. Соломонюк // Матеріали Всеукр. наук.-техн. конф. з міжнар. участю "Сучасні технології проектування, побудови, експлуатації і ремонту суден, морських технічних засобів і інженерних споруд". – Миколаїв : НУК, 2013.
Предлагается заменить блоки плавучести из сферопластика в необитаемом привязном подводном аппарате «Аргобуй», спроектированного для Института гидромеханики АН Украины, на блоки плавучести из пеностекла.
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Юреско, Татьяна Анатольевна. "Проектирование теплоизолирующих блоков для глубоководных обитаемых средств." Thesis, 2013. http://eir.nuos.edu.ua/xmlui/handle/123456789/1170.

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Юреско, Т. А. Проектирование теплоизолирующих блоков для глубоководных обитаемых средств / Т. А. Юреско // Матеріали Всеукр. наук.-техн. конф. з міжнар. участю "Сучасні технології проектування, побудови, експлуатації і ремонту суден, морських технічних засобів і інженерних споруд". – Миколаїв : НУК, 2013.
Полученное решение, с учетом изменения теплофизических характеристик СДП вследствие повреждаемости при длительных и циклических погружениях, согласно математическим моделям, позволяет оценить эффективность работы теплоизолирующих блоков в течении 15–30 лет их непрерывной эксплуатации на различных глубинах.
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