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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">zldm</journal-id><journal-title-group><journal-title xml:lang="ru">Заводская лаборатория. Диагностика материалов</journal-title><trans-title-group xml:lang="en"><trans-title>Industrial laboratory. Diagnostics of materials</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1028-6861</issn><issn pub-type="epub">2588-0187</issn><publisher><publisher-name>ООО «Издательство «ТЕСТ-ЗЛ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26896/1028-6861-2024-90-2-62-72</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-2122</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МЕХАНИКА МАТЕРИАЛА: ПРОЧНОСТЬ, РЕСУРС, БЕЗОПАСНОСТЬ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATERIALS MECHANICS: STRENGTH, DURABILITY, SAFETY</subject></subj-group></article-categories><title-group><article-title>Расчет напряженно-деформированного состояния слоев ортогонально- армированного полимерного композиционного материала на основе  экспериментальной диаграммы деформирования при одноосном растяжении</article-title><trans-title-group xml:lang="en"><trans-title>Calculation of the stress-strain state of layers of cross-ply laminate based on an experimental stress-strain curves under uniaxial tension</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Половый</surname><given-names>А. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Polovyi</surname><given-names>A. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Олегович Половый</p><p>249031, Обнинск, Киевское шоссе, д. 15</p></bio><bio xml:lang="en"><p>Aleksandr O. Polovyi</p><p>15, Kievskoye Shosse, 249031, Obninsk</p></bio><email xlink:type="simple">polovy@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лисаченко</surname><given-names>Н. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Lisachenko</surname><given-names>N. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Наталья Геннадиевна Лисаченко</p><p>249031, Обнинск, Киевское шоссе, д. 15</p></bio><bio xml:lang="en"><p>Natalia G. Lisachenko</p><p>15, Kievskoye Shosse, 249031, Obninsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>АО «ОНПП «Технология» им. А. Г. Ромашина»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A. G. Romashin ORPE Tekhnologiya</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>22</day><month>02</month><year>2024</year></pub-date><volume>90</volume><issue>2</issue><fpage>62</fpage><lpage>72</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Половый А.О., Лисаченко Н.Г., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Половый А.О., Лисаченко Н.Г.</copyright-holder><copyright-holder xml:lang="en">Polovyi A.O., Lisachenko N.G.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.zldm.ru/jour/article/view/2122">https://www.zldm.ru/jour/article/view/2122</self-uri><abstract><p>Предложен метод расчета напряженно-деформированного состояния слоев ортогонально-армированного полимерного композиционного материала на основе экспериментальной диаграммы деформирования при одноосном растяжении. Суть метода заключается в решении системы двух уравнений, описывающих экспериментальные кривые σx = f(εx) и σx = f(εy), которое позволяет определить два неизвестных параметра, связанных с секущими упругими характеристиками материала слоев. Закон изменения остальных неизвестных параметров задается путем принятия допущений о том, каким образом полимерный композиционный материал и его слои деформируются в процессе нагружения. Для проведения расчета необходимо задать начальные значения упругих характеристик однонаправленного материала слоев, которые должны хорошо согласовываться с определенными из эксперимента начальными величинами упругих характеристик исследуемой структуры. По разработанному алгоритму получены расчетные зависимости между средними напряжениями, деформациями и секущими упругими характеристиками слоев структуры (0°/90°/90°/0°) из стеклопластика E-Glass/MY750 с использованием экспериментальных данных, взятых из литературных источников. Расчеты, проведенные для трех наборов начальных значений упругих характеристик исследуемого материала, показали качественно одинаковые результаты. Поперечное растягивающее напряжение в слое 90° достигает максимума в первой половине диаграммы деформирования, а затем снижается до нуля. Аналогичное напряжение в слое 0° достигает максимума в точке разрушения исследуемой структуры. Выявлено, что максимальные расчетные значения поперечных напряжений, действующих в слоях 0° и 90°, заметно превышают указанный в публикации других авторов предел прочности материала при растяжении поперек волокон. Продольное растягивающее напряжение в слое 0° достигает максимума в точке разрушения и соответствует 95 % от предела прочности материала при растяжении вдоль волокон. Продольное сжимающее напряжение в слое 90° находится на низком уровне на протяжении всего процесса деформирования исследуемой структуры. Результаты работы могут быть использованы для разработки моделей поведения слоев с трещинами в матрице при нагружении полимерного композиционного материала.</p></abstract><trans-abstract xml:lang="en"><p>A method for calculating the stress-strain state of layers of cross-ply laminate based on an experimental deformation diagram under uniaxial tension is proposed. The essence of the method consists in solving a system of two equations describing the experimental curves σx = f(εx) and σx = f(εy), which allows determination of two unknown parameters related to the secant elastic characteristics of the material layers. The law of change in the remaining unknown parameters is set by assumptions regarding deformation of the polymer matrix composite and its layers during loading. To carry out the calculation, it is necessary to set the initial values of the elastic properties of the unidirectional material of the layers, which should be well consistent with the initial values of the elastic properties of the structure under study determined from the experiment. According to the developed algorithm, calculated dependences between average stresses, deformations and secant elastic properties of the layers of the structure are obtained (0°/90°/90°/0°) made of fiberglass E-Glass/MY750 using experimental data from the literature. Calculations carried out for three sets of initial values of the elastic properties of the material under study showed qualitatively identical results. The transverse tensile stress in the 90° layer reaches a maximum in the first half of the stress-strain diagram, and then decreases to zero. A similar stress in the 0° layer reaches a maximum at the failure point of the structure under study. It is revealed that the maximum calculated values of transverse stresses acting in layers 0° and 90° noticeably exceed the transverse tensile strength of the material specified in the literature. The longitudinal tensile stress in the 0° layer reaches a maximum at the failure point and corresponds to 95% of the value of the longitudinal tensile strength of the material. The longitudinal compressive stress in the 90° layer is at a low level throughout the deformation process of the structure under study. The results of this study can be recommended for developing models of the behavior of layers with cracks in the matrix when loading a polymer matrix composite.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>полимерный композиционный материал</kwd><kwd>ортогонально- армированный ламинат</kwd><kwd>диаграмма деформирования</kwd><kwd>напряженно- деформированное состояние</kwd><kwd>расчетная модель</kwd><kwd>секущие упругие  характеристики</kwd><kwd>предел прочности при растяжении</kwd></kwd-group><kwd-group xml:lang="en"><kwd>polymer matrix composite</kwd><kwd>cross-ply laminate</kwd><kwd>stress-strain diagram</kwd><kwd>stress-strain state</kwd><kwd>calculation model</kwd><kwd>secant elastic properties</kwd><kwd>tensile strength</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Alfutov N. A., Zinoviev P. A., Popov B. G. 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