<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Structural Mechanics of Engineering Constructions and Buildings</journal-id><journal-title-group><journal-title xml:lang="en">Structural Mechanics of Engineering Constructions and Buildings</journal-title><trans-title-group xml:lang="ru"><trans-title>Строительная механика инженерных конструкций и сооружений</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1815-5235</issn><issn publication-format="electronic">2587-8700</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">30914</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2021-17-6-576-587</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Theory of thin elastic shells</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Теория тонких оболочек</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Diagnostics of thin-walled structures of complex geometry and structure</article-title><trans-title-group xml:lang="ru"><trans-title>Диагностика тонкостенных конструкций сложной геометрии и структуры</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8248-1589</contrib-id><name-alternatives><name xml:lang="en"><surname>Yakupov</surname><given-names>Nukh M.</given-names></name><name xml:lang="ru"><surname>Якупов</surname><given-names>Нух Махмудович</given-names></name></name-alternatives><bio xml:lang="en"><p>Dr.Sci. (Eng.), leading researcher, Institute of Mechanics and Engineering</p></bio><bio xml:lang="ru"><p>доктор технических наук, ведущий научный сотрудник, Институт механики и машиностроения</p></bio><email>yzsrr@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0047-3679</contrib-id><name-alternatives><name xml:lang="en"><surname>Yakupov</surname><given-names>Samat N.</given-names></name><name xml:lang="ru"><surname>Якупов</surname><given-names>Самат Нухович</given-names></name></name-alternatives><bio xml:lang="en"><p>PhD in Technical Sciences, senior researcher, Institute of Mechanics and Engineering</p></bio><bio xml:lang="ru"><p>кандидат технических наук, старший научный сотрудник, Институт механики и машиностроения</p></bio><email>tamas_86@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kazan Scientific Center, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Казанский научный центр РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-12-30" publication-format="electronic"><day>30</day><month>12</month><year>2021</year></pub-date><volume>17</volume><issue>6</issue><issue-title xml:lang="en">Prospects for the application of shell structures and thin shells in the first half of the 21st century</issue-title><issue-title xml:lang="ru">Перспективы применения оболочечных структур и тонких оболочек в первой половине XXI в.</issue-title><fpage>576</fpage><lpage>587</lpage><history><date date-type="received" iso-8601-date="2022-04-28"><day>28</day><month>04</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Yakupov N.M., Yakupov S.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Якупов Н.М., Якупов С.Н.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Yakupov N.M., Yakupov S.N.</copyright-holder><copyright-holder xml:lang="ru">Якупов Н.М., Якупов С.Н.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/structural-mechanics/article/view/30914">https://journals.rudn.ru/structural-mechanics/article/view/30914</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The main stages of the birth of thin-walled structures, changes in their relative thickness and mass of a unit area are given; ways of creating perfect thin-walled structures are indicated. The problems arising during the operation of thin-walled structures of complex geometry, as well as approaches and methods of their calculation are noted. To ensure trouble-free operation of a thin-walled structure with a thin-layer coating, under load and exposed to physical fields and environments, it is necessary to correctly diagnose the condition of structural elements. The spline variant of the finite element method in two-dimensional (SV FEM-2) and three-dimensional (SV FEM-3) productions is noted, as well as the synthesis of these variants - SV FEM-2 + SV FEM-3. The combination of the idea of parametrization of the entire domain and approximation of the desired variables within the element by Hermitian cubic splines makes it possible to obtain high-precision consistent finite elements. The developed variants of the finite element method make it possible to evaluate the stress-strain state of structures of complex geometry, including the calculation of multilayer, thin-walled structures with coating and local defects, as well as to take into account specific surface properties other than those of the main array. Studies of stress concentration near local depressions are considered. Two-dimensional experimental and theoretical methods are noted for evaluating the stiffness properties and adhesion of thin-walled, thin-layer and composite structural elements of complex structure, which, along with a distributed complex structure, may have distributed defects. The developments were used in solving specific tasks of a number of enterprises.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Приведены основные этапы рождения тонкостенных конструкций, изменения их относительной толщины и массы единичной площади; указаны пути создания совершенных тонкостенных конструкций. Отмечены проблемы, возникающие в процессе эксплуатаций тонкостенных конструкций сложной геометрии, а также подходы и методы их расчета. Для обеспечения безаварийной работы тонкостенной конструкции с тонкослойным покрытием, находящихся под нагрузкой и испытывающих воздействие физических полей и сред, необходимо грамотно диагностировать состояния элементов конструкций. Отмечается сплайновый вариант метода конечных элементов в двумерной (СВ МКЭ-2) и трехмерной (СВ МКЭ-3) постановках, а также синтез этих вариантов - СВ МКЭ-2 + СВ МКЭ-3. Сочетание идеи параметризации всей области и аппроксимация искомых переменных в пределах элемента эрмитовыми кубическими сплайнами позволяет получать высокоточные согласованные конечные элементы. Разработанные варианты метода конечных элементов дают возможность оценивать напряженно-деформированное состояние конструкций сложной геометрии, в том числе расчет многослойных, тонкостенных конструкций с покрытием и локальными дефектами, а также учитывать специфические поверхностные свойства, отличные от свойств основного массива. Рассматриваются исследования концентрации напряжений около локальных углублений. Отмечаются двумерные экспериментально-теоретические методы оценки жесткостных свойств и адгезии тонкостенных, тонкослойных и композиционных элементов конструкций сложной структуры, которые наряду с распределенной сложной структурой могут иметь распределенные дефекты. Разработки использованы при решении конкретных задач ряда предприятий.</p></trans-abstract><kwd-group xml:lang="en"><kwd>thin-walled structures</kwd><kwd>complex geometry</kwd><kwd>complex structure</kwd><kwd>protective coating</kwd><kwd>adhesion</kwd><kwd>birth history</kwd><kwd>physical fields</kwd><kwd>physical environment</kwd><kwd>state diagnostics</kwd><kwd>calculation approaches</kwd><kwd>spline version</kwd><kwd>finite element method</kwd><kwd>experimental-theoretical method</kwd><kwd>stiffness characteristics</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>тонкостенные конструкции</kwd><kwd>сложная геометрия</kwd><kwd>сложная структура</kwd><kwd>защитное покрытие</kwd><kwd>адгезия</kwd><kwd>история рождения</kwd><kwd>физические поля</kwd><kwd>среда</kwd><kwd>диагностика состояния</kwd><kwd>подходы расчета</kwd><kwd>сплайновый вариант</kwd><kwd>метод конечных элементов</kwd><kwd>экспериментально-теоретический метод</kwd><kwd>жесткостные характеристики</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Hart-Davies A. (ed.) Science: the definitive visual guide. London: Dorling Kindersley Limited; 2009.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Al-Hassani S.T.S. 1001 inventions: the enduring legacy of Muslim civilization. National Geographic; 2012.</mixed-citation></ref><ref id="B3"><label>3.</label><citation-alternatives><mixed-citation xml:lang="en">Yakupov N.M., Galimov Sh.K., Khismatullin N.I. From stone blocks to thin-walled structures. Kazan: SOS Publ.; 2001. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Якупов Н.М., Галимов Ш.К., Хисматуллин Н.И. От каменных глыб к тонкостенным конструкциям. Казань: SOS, 2001. 96 с.</mixed-citation></citation-alternatives></ref><ref id="B4"><label>4.</label><citation-alternatives><mixed-citation xml:lang="en">Makhutov N.A. Strength and safety. Fundamental and applied research. Novosibirsk: Nauka Publ.; 2008. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Махутов Н.А. Прочность и безопасность. Фундаментальные и прикладные исследования. Новосибирск: Наука, 2008. 523 с.</mixed-citation></citation-alternatives></ref><ref id="B5"><label>5.</label><citation-alternatives><mixed-citation xml:lang="en">Yakupov S.N., Tameev I.M., Yakupov N.M. Diagnostics and treatment of pipelines. Kazan: Kazanskaya Nedvizhimost' Publ.; 2018. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Якупов С.Н., Тамеев И.М., Якупов Н.М. Диагностика и лечение трубопроводов. Казань: Казанская недвижимость, 2018. 180 с.</mixed-citation></citation-alternatives></ref><ref id="B6"><label>6.</label><mixed-citation>Collins J.A. Failure of materials in mechanical design. Analysis, prediction, prevention. New York: John Wiley &amp; Sons; 1981. (In Russ.)</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Montemor M.F. Functional and smart coatings for corrosion protection: a review of recent advances. Surface &amp; Coatings Technology. 2014;258:17-37.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Dry C.M., Sottos N. Smart structures and materials 1993: smart materials // SPIE Proceedings. 1916;1:438-444.</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Dry C. Procedures developed for self-repair of polymeric matrix composite materials. Comp. Struct. 1996;35(3): 263-269. https://doi.org/10.1016/0263-8223(96)00033-5</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Yakupov S.N., Yakupov N.M. Thin-layer films and coatings. Journal of Physics: Conference Series. 2017;857: 012056. https://doi.org/10.1088/1742-6596/857/1/012056</mixed-citation></ref><ref id="B11"><label>11.</label><citation-alternatives><mixed-citation xml:lang="en">Paimushin V.N. Boundary value problems of deformation mechanics of shells of complex geometry (dissertation of Doctor of Physical and Mathematical Sciences). Kazan; 1979. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Паймушин В.Н. Краевые задачи механики деформирования оболочек сложной геометрии: дис. … д-ра физ.-мат. наук. Казань, 1979. 402 с.</mixed-citation></citation-alternatives></ref><ref id="B12"><label>12.</label><citation-alternatives><mixed-citation xml:lang="en">Rekach V.G., Krivoshapko S.N. Calculation of shells of complex geometry. Moscow: Peoples’ Friendship University; 1988. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Рекач В.Г., Кривошапко С.Н. Расчет оболочек сложной геометрии. М.: Университет дружбы народов, 1988. 177 с.</mixed-citation></citation-alternatives></ref><ref id="B13"><label>13.</label><mixed-citation>Krivoshapko S.N., Ivanov V.N. Encyclopedia of analytical surfaces. Switzerland: Springer; 2015.</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Mushtari Kh.M., Galimov K.Z. Non-linear theory of thin elastic shells. Jerusalem; 1962.</mixed-citation></ref><ref id="B15"><label>15.</label><citation-alternatives><mixed-citation xml:lang="en">Ilyushin A.A. Plasticity. Moscow: Gostekhizdat Publ.; 1948. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Ильюшин А.А. Пластичность. М.: Гостехиздат, 1948. 376 с.</mixed-citation></citation-alternatives></ref><ref id="B16"><label>16.</label><citation-alternatives><mixed-citation xml:lang="en">Zverayaev E.M. Extraction of consistent shell theory equations from 3D theory of elasticity. Structural Mechanics of Engineering Constructions and Buildings. 2019;15(2):135-148. (In Russ.) https://doi.org/10.22363/1815-5235-2019-15-2-135-148</mixed-citation><mixed-citation xml:lang="ru">Зверяев E.M. Выделение согласованных уравнений классической теории оболочек из трехмерных уравнений теории упругости // Строительная механика инженерных конструкций и сооружений. 2019. Т. 15. № 2. С. 135-148. https://doi.org/10.22363/1815-5235-2019-15-2-135-148</mixed-citation></citation-alternatives></ref><ref id="B17"><label>17.</label><citation-alternatives><mixed-citation xml:lang="en">Golovanov A.I., Pesoshin A.V., Tyuleneva O.N. Modern finite element models and methods for studies of thin-walled structures. Kazan: Kazan State University; 2005. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Голованов А.И., Песошин А.В., Тюленева О.Н. Современные конечно-элементные модели и методы исследования тонкостенных конструкций. Казань: КГУ, 2005. 442 с.</mixed-citation></citation-alternatives></ref><ref id="B18"><label>18.</label><mixed-citation>Yang H.T.Y., Saigal S., Masud A., Kapania R.K. A survey of recent shell finite elements. Int. J. for Numerical Methods in Engineering. 2000;47:101-127.</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>Members C., Ashwell D.G., Gallagher R. Finite elements for thin shells and curved members. London: John Wiley &amp; Sons; 1976.</mixed-citation></ref><ref id="B20"><label>20.</label><mixed-citation>Herrmann I.R. Finite element bending analysis for plates. Journal of Engineering Mechanics. 1967;93(5):13-26.</mixed-citation></ref><ref id="B21"><label>21.</label><mixed-citation>Argyris J.H., Fried I., Scharpf D.W. The TUBA family of plate elements for the matrix displacement methods. The Aeronautical Journal. 1968;72(692):701-709.</mixed-citation></ref><ref id="B22"><label>22.</label><mixed-citation>Fraeijs de Veubeke B. Displacement and equilibrium models in the finite element methods. Stress Analysis. New York; 1965. p. 145-197.</mixed-citation></ref><ref id="B23"><label>23.</label><mixed-citation>Connor J., Brebbia C.A. A stiffness matrix for shallow rectangular shell element. Journal of the Engineering Mechanics Division. 1967;93(5):43-65.</mixed-citation></ref><ref id="B24"><label>24.</label><mixed-citation>Elias Z.M. Duality in finite element methods. Journal of the Engineering Mechanics Division. 1968;94(4):931-948.</mixed-citation></ref><ref id="B25"><label>25.</label><mixed-citation>Lee S.W., Dai C.C., Yeom C.H. A triangular finite element for thin plates and shells. International Journal for Numerical Methods in Engineering. 1985;21(10):1813-1831.</mixed-citation></ref><ref id="B26"><label>26.</label><mixed-citation>Gallagher R.H. Finite element representation for thin shell instability analysis. Buckling of Structures. Cambridge; 1974. p. 40-51.</mixed-citation></ref><ref id="B27"><label>27.</label><citation-alternatives><mixed-citation xml:lang="en">Sakharov A.S., Kislooky V.N., Kirichevsky V.V., Altenbach I., Gabbert U., Dankert Yu., Keppler H., Kochyk Z. The finite element method in the mechanics of solids (A.S. Sakharov, I. Altenbach, eds.). Kiev: Vishcha Shkola Publ.; 1982. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Сахаров А.С., Кислоокий В.Н., Киричевский В.В., Альтенбах И., Габберт У., Данкерт Ю., Кепплер Х., Кочык З. Метод конечных элементов в механике твердых тел. Киев: Вища школа, 1982. 479 с.</mixed-citation></citation-alternatives></ref><ref id="B28"><label>28.</label><mixed-citation>Argyris J.H., Scharpf D.W. The SHEBA family of shell elements for the matrix displacement methods. The Aeronautical Journal. 1968;72(694):873-883.</mixed-citation></ref><ref id="B29"><label>29.</label><mixed-citation>Clough R.W., Johnson R.J. A finite element approximation for the analysis of thin shell. International Journal of Solids and Structures. 1968;4(1):43-60.</mixed-citation></ref><ref id="B30"><label>30.</label><mixed-citation>Brebbia C.A., Nath J.M.D. A comparison of recent shallow shell finite element analysis. International Journal of Mechanical Sciences. 1970;12(10):849-857.</mixed-citation></ref><ref id="B31"><label>31.</label><mixed-citation>Ahmad S., Irons B., Zienkiewicz O. Analysis of thick and thin shell structures by curved finite elements. International Journal for Numerical Methods in Engineering. 1970;2(3):419-451.</mixed-citation></ref><ref id="B32"><label>32.</label><mixed-citation>Dupuis D., Goel J.J. A curved finite element for thin elastic shells. International Journal of Solids and Structures. 1970;6(11):1413-1428.</mixed-citation></ref><ref id="B33"><label>33.</label><mixed-citation>Dawe D.J. Rigid-body motions and strain-displacement equations of curved shell finite elements. International Journal of Mechanical Sciences. 1972;14(9):569-578.</mixed-citation></ref><ref id="B34"><label>34.</label><mixed-citation>Sabir A.B., Lock A.C. A curved, cylindrical shell, finite element. International Journal of Mechanical Sciences. 1972;14(2):125-135.</mixed-citation></ref><ref id="B35"><label>35.</label><mixed-citation>Irons B.M., Razzaque A. A further modification to Ahmad’s shell element. International Journal for Numerical Methods in Engineering. 1973;5(4):588-589.</mixed-citation></ref><ref id="B36"><label>36.</label><mixed-citation>Kant T., Menon M.P. Higher-order theories for composite and sandwich cylindrical shells with finite element. Computers and Structures. 1985;33(5):1191-1204.</mixed-citation></ref><ref id="B37"><label>37.</label><mixed-citation>Noor A.K., Burton W.S., Bert C.W. Computational models for sandwich panels and shells. Applied Mechanics Reviews. 1996;49:155-199.</mixed-citation></ref><ref id="B38"><label>38.</label><mixed-citation>Nayak A.K., Moy S.S.J., Shenoi R.A. Free vibration analysis of composite sandwich plates based on Reddy’s higher order theory. Composites Part B. Engineering. 2002;33:505-519.</mixed-citation></ref><ref id="B39"><label>39.</label><mixed-citation>De Sousa R.J.A., Cardoso R.P.R., Valente R.A.F., Yoon J.-W., Grácio J.J., Natal Jorge R.M. A new one-point quadrature enhanced assumed strain (EAS) solid-shell element with multiple integration points along thickness. Int. J. Numer. Meth. Engng. 2005;62(7):952-977. https://doi.org/10.1002/nme.1226</mixed-citation></ref><ref id="B40"><label>40.</label><citation-alternatives><mixed-citation xml:lang="en">Yakupov N.M. Calculating complex shells. Proceedings of a Shell Theory Seminar. 1984;17(II):4-17.</mixed-citation><mixed-citation xml:lang="ru">Якупов Н.М. Об одном методе расчета оболочек сложной геометрии // Исследования по теории оболочек: труды семинара. Вып. 17. Ч. II. Казань, 1984. С. 4-17.</mixed-citation></citation-alternatives></ref><ref id="B41"><label>41.</label><citation-alternatives><mixed-citation xml:lang="en">Kornishin M.S., Yakupov N.M. Spline variant of finite element method for the calculation of complex shells. Prikladnaya Mekhanika. 1987;23(3):38-44.</mixed-citation><mixed-citation xml:lang="ru">Корнишин М.С., Якупов Н.М. Сплайновый вариант метода конечных элементов для расчета оболочек сложной геометрии // Прикладная механика. 1987. Т. 23. № 3. С. 38-44.</mixed-citation></citation-alternatives></ref><ref id="B42"><label>42.</label><citation-alternatives><mixed-citation xml:lang="en">Kornishin M.S., Yakupov N.M. To the calculation of shells of complex geometry in cylindrical coordinates based on the spline version of the FEM. Prikladnaya Mekhanika. 1989;25(8):53-60.</mixed-citation><mixed-citation xml:lang="ru">Корнишин М.С., Якупов Н.М. К расчету оболочек сложной геометрии в цилиндрических координатах на основе сплайнового варианта МКЭ // Прикладная механика. 1989. Т. 25. № 8. С. 53-60.</mixed-citation></citation-alternatives></ref><ref id="B43"><label>43.</label><citation-alternatives><mixed-citation xml:lang="en">Dautov R.Z. Estimation of the accuracy of FEM schemes based on rectangular elements with numerical integration for shells of complex geometry. Proceedings of a Shell Theory Seminar. 1992;27:22-36.</mixed-citation><mixed-citation xml:lang="ru">Даутов Р.З. Оценка точности схем МКЭ на основе прямоугольных элементов с численным интегрированием для оболочек сложной геометрии // Исследования по теории оболочек: труды семинара. Вып. 27. Казань, 1992. С. 22-36.</mixed-citation></citation-alternatives></ref><ref id="B44"><label>44.</label><citation-alternatives><mixed-citation xml:lang="en">Yakupov N.M., Kiyamov H.G., Yakupov S.N., Kiyamov I.Kh. Modeling of structural elements of complex geometry by three-dimensional finite elements. Mechanics of Composite Materials and Structures. 2011;17(1):145-154. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Якупов Н.М., Киямов Х.Г., Якупов С.Н., Киямов И.Х. Моделирование элементов конструкций сложной геометрии трехмерными конечными элементами // Механика композиционных материалов и конструкций. 2011. Т. 17. № 1. С. 145-154.</mixed-citation></citation-alternatives></ref><ref id="B45"><label>45.</label><mixed-citation>Yakupov N.M., Kiyamov H.G., Yakupov S.N. Modelling of cyclic shells with complex geometry three-dimensional finite elements. J. Phys.: Conf. Ser. 2019;1158:042038. https://doi.org/10.1088/1742-6596/1158/4/042038</mixed-citation></ref><ref id="B46"><label>46.</label><citation-alternatives><mixed-citation xml:lang="en">Kantyukov R.A., Yakupov N.M., Tameev I.M., Kiyamov Kh.G., Yakupov S.N., Kantyukov R.R. Modeling of the stress - strain state of a cylindrical body with a local depression by three - dimensional finite elements. Nauka i Thechnika v Gazovay Promyshlennosti. 2012;(2):53-60. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Кантюков Р.А., Якупов Н.М., Тамеев И.М., Киямов Х.Г., Якупов С.Н., Кантюков Р.Р. Моделирование напряженно-деформированного состояния цилиндрического тела с локальным углублением трехмерными конечными элементами // Наука и техника в газовой промышленности. 2012. № 2. С. 53-60.</mixed-citation></citation-alternatives></ref><ref id="B47"><label>47.</label><mixed-citation>Yakupov N.M., Kiyamov H.G., Mukhamedova I.Z. Simulation of toroidal shell with local defect. Lobachevskii Journal of Mathematics. 2020;41(7):1310-1314.</mixed-citation></ref><ref id="B48"><label>48.</label><mixed-citation>Yakupov N.M., Kiyamov H.G., Mukhamedova I.Z. Calculation of the fragments toroidal shell with local internal deepening. Lobachevskii Journal of Mathematics. 2021;42(9):2257-2262.</mixed-citation></ref><ref id="B49"><label>49.</label><mixed-citation>Yakupov S.N., Kiyamov H.G., Yakupov N.M. Modeling a synthesized element of complex geometry based upon three-dimensional and two-dimensional finite elements. Lobachevskii Journal of Mathematics. 2021;42(9):2263-2271.</mixed-citation></ref><ref id="B50"><label>50.</label><mixed-citation>Yakupov S.N., Kiyamov H.G., Yakupov N.M. Numerical model of the structural element complex geometry with a coating. J. Phys.: Conf. Ser. 2021;1954:012054. https://doi.org/10.1088/1742-6596/1954/1/012054</mixed-citation></ref><ref id="B51"><label>51.</label><mixed-citation>Oliver W.C., Pharr G.M. An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. Journal of Materials Research. 1992;7:1564-1583. https://doi.org/10.1557/JMR.1992.1564</mixed-citation></ref><ref id="B52"><label>52.</label><mixed-citation>Yakupov N.M., Nurullin R.G., Yakupov S.N. Mechanical properties of thin films and nanofilms. Russian Engineering Research. 2010;29(6):571-574.</mixed-citation></ref><ref id="B53"><label>53.</label><mixed-citation>Galimov N.K., Yakupov N.M., Yakupov S.N. Experimental-theoretical method for determining the mechanical characteristics of spherical films and membranes with a complex structure. Mechanics of Solids. 2011;46(3):380-386. https://doi.org/10.3103/S0025654411030058</mixed-citation></ref><ref id="B54"><label>54.</label><citation-alternatives><mixed-citation xml:lang="en">Yakupov N.M., Galimov N.K., Yakupov S.N. Methodology of studying non-planar films and membranes of complex structure. Industrial Laboratory. Diagnostics of Materials. 2019;85(2):55-59. (In Russ.) https://doi.org/10.26896/1028-6861-2019-85-2-55-59</mixed-citation><mixed-citation xml:lang="ru">Якупов Н.М., Галимов Н.К., Якупов С.Н. Методика исследования неплоских пленок и мембран сложной структуры // Заводская лаборатория. Диагностика материалов. 2019. Т. 85. № 2. С. 55-59. https://doi.org/10.26896/1028-6861-2019-85-2-55-59</mixed-citation></citation-alternatives></ref><ref id="B55"><label>55.</label><mixed-citation>Yakupov N.M., Kharislamova L.U. Stiffness of compositions with delamination’s and the influence of ultraviolet on adhesion. Lobachevskii Journal of Mathematics. 2019;40(6):840-845. https://doi.org/10.1134/S199508021906026X</mixed-citation></ref><ref id="B56"><label>56.</label><mixed-citation>Yakupov S.N., Kharislamova L.U., Yakupov N.M. Studying the stiffness of thin-layered compositions with delaminations. J. Phys.: Conf. Ser. 2019;1281:012092. https://doi.org/10.1088/1742-6596/1281/1/012092</mixed-citation></ref><ref id="B57"><label>57.</label><mixed-citation>Yakupov S.N., Yakupov N.M. Research of mechanical characteristics thin coating. J. Phys.: Conf. Ser. 2019; 1328:012103.</mixed-citation></ref><ref id="B58"><label>58.</label><mixed-citation>Yakupov N.M., Yakupov S.N., Gubaydullin R.I. Research of adhesion of a covering on cylindrical surfaces. J. Phys.: Conf. Ser. 2019;1281(1):012091. https://doi.org/10.1088/1742-6596/1281/1/012091</mixed-citation></ref><ref id="B59"><label>59.</label><mixed-citation>Yakupov S.N., Gubaidullin R.I., Yakupov N.M. Determination of hardness of thin layer coating and its adhesion to the shell of the cylindrical form. J. Phys.: Conf. Ser. 2019;1158:042039. https://doi.org/10.1088/1742-6596/1158/4/042039</mixed-citation></ref><ref id="B60"><label>60.</label><mixed-citation>Yakupov S.N., Gubaidullin R.I., Yakupov N.M. Investigation of the influence of the nature of surface deformation on coating adhesion. J. Phys.: Conf. Ser. 2021;1954:012053. https://doi.org/10.1088/1742-6596/1954/1/012053</mixed-citation></ref></ref-list></back></article>
