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<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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Frontier Materials &amp; Technologies</journal-id><journal-title-group><journal-title xml:lang="en">Frontier Materials &amp; Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Frontier Materials &amp; Technologies</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2782-4039</issn><issn publication-format="electronic">2782-6074</issn><publisher><publisher-name xml:lang="en">Togliatti State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">421</article-id><article-id pub-id-type="doi">10.18323/2782-4039-2022-2-7-16</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Investigation of damages formed in polymer composite materials under bending loading and their identification by the acoustic emission technique</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование развивающихся повреждений при изгибном нагружении полимерных композиционных материалов и их идентификация методом акустической эмиссии</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7992-0165</contrib-id><name-alternatives><name xml:lang="en"><surname>Bryansky</surname><given-names>Anton A.</given-names></name><name xml:lang="ru"><surname>Брянский</surname><given-names>Антон Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Head of the Laboratory, junior researcher</p></bio><bio xml:lang="ru"><p>заведующий лабораторией, младший научный сотрудник</p></bio><email>bryansky.aa@yandex.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3910-9797</contrib-id><name-alternatives><name xml:lang="en"><surname>Bashkov</surname><given-names>Oleg V.</given-names></name><name xml:lang="ru"><surname>Башков</surname><given-names>Олег Викторович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Sciences (Engineering), Associate Professor, Head of Chair of Materials Science and New Material Technology, leading researcher</p></bio><bio xml:lang="ru"><p>доктор технических наук, доцент, заведующий кафедрой материаловедения и технологии новых материалов, ведущий научный сотрудник</p></bio><email>bashkov@knastu.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0560-2855</contrib-id><name-alternatives><name xml:lang="en"><surname>Belova</surname><given-names>Inna V.</given-names></name><name xml:lang="ru"><surname>Белова</surname><given-names>Инна Валерьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Engineering), assistant professor of Chair of Materials Science and New Material Technology</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры материаловедения и технологии новых материалов</p></bio><email>Inna_belova@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7070-5821</contrib-id><name-alternatives><name xml:lang="en"><surname>Bashkova</surname><given-names>Tatyana I.</given-names></name><name xml:lang="ru"><surname>Башкова</surname><given-names>Татьяна Игоревна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Engineering), assistant professor of Chair of Materials Science and New Material Technology</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры материаловедения и технологии новых материалов</p></bio><email>telem01@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Komsomolsk-on-Amur State University, Komsomolsk-on-Amur</institution></aff><aff><institution xml:lang="ru">Комсомольский-на-Амуре государственный университет, Комсомольск-на-Амуре</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Institute of Automation and Control Processes of the Far Eastern Branch of RAS, Vladivostok</institution></aff><aff><institution xml:lang="ru">Институт автоматики и процессов управления Дальневосточного отделения РАН, Владивосток</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-06-30" publication-format="electronic"><day>30</day><month>06</month><year>2022</year></pub-date><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>7</fpage><lpage>16</lpage><history><date date-type="received" iso-8601-date="2022-06-30"><day>30</day><month>06</month><year>2022</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://vektornaukitech.ru/jour/article/view/421">https://vektornaukitech.ru/jour/article/view/421</self-uri><abstract xml:lang="en"><p>Polymer composite materials (PCM) reinforced with glass fibers are very important in many industries due to their unique properties (high chemical resistance and specific strength) with the economic efficiency of use. At the same time, the application of glass fabrics as reinforcing elements ensures high manufacturability. However, unlike crystalline materials, polymer composite materials are subject to the complex process of destruction, which requires the application of non-destructive control methods to get information about the nature of the resulting damage and the kinetics of their accumulation. The paper studies the deteriorations formed in the fiberglass samples molded using T-11-GVS-9 glass fabric and DION 9300 FR binder within static bending deformation accompanied by the acoustic emission (AE) method. In this work, the authors solved the problem of identifying the nature of damages in fiberglass using the Fourier spectra of the recorded AE signals. The authors used the clustering method to estimate their formation and development kinetics. Clustering was performed based on the Kohonen self-organizing map (SOM) algorithm using the values of peak frequencies of the Fourier spectra calculated for the recorded AE signals under static bending deformation of a fiberglass sample up to failure. To ensure the separability of the resulting damages according to the AE parameters, the authors used the loading rate that was ten times lower than that calculated according to the state standard. The study established that the application of frequency representation of AE signals recorded during the fiberglass destruction is effective when solving the task of identifying the nature of the resulting damages. As a result of the study, the authors found that the process of delamination formation during the bending of multilayer laminated plastics acts as a critical mechanism of destruction leading to a significant loss of the polymer composite strength properties.</p></abstract><trans-abstract xml:lang="ru"><p>Полимерные композиционные материалы (ПКМ), армированные стеклянными волокнами, востребованы во многих отраслях промышленности благодаря комплексу уникальных свойств (высокой удельной прочности и хемостойкости) при экономической эффективности применения. Вместе с тем использование стеклотканей в роли армирующих элементов обеспечивает высокую технологичность производства. Однако, в отличие от кристаллических материалов, ПКМ подвержены сложному процессу разрушения, требующего применения неразрушающих методов контроля для получения информации о природе образующихся повреждений и кинетики их накопления. Работа посвящена исследованию повреждений, развивающихся в образцах стеклопластика, формованного с использованием стеклоткани Т-11-ГВС-9 и связующего DION 9300 FR, в условиях статической деформации изгибом в сопровождении метода акустической эмиссии (АЭ). В работе решалась задача идентификации природы повреждений в стеклопластике по спектрам Фурье регистрируемых сигналов АЭ. Для оценки кинетики образования и развития повреждений использовался метод кластеризации. Кластеризация выполнялась на основе алгоритма самоорганизующейся карты Кохонена (SOM) с использованием значений пиковых частот спектров Фурье, рассчитанных для зарегистрированных сигналов АЭ при статической деформации изгибом образца стеклопластика до разрушения. Для обеспечения разделимости образующихся повреждений по параметрам АЭ использовалась скорость нагружения в 10 раз ниже определяемой по государственному стандарту. Установлено, что использование частотного представления сигналов АЭ, регистрируемых при разрушении стеклопластика, эффективно при решении задачи идентификации природы образующихся повреждений. Установлено, что процесс образования расслоений при изгибе многослойных слоистых пластиков выступает критическим механизмом разрушения, приводящим к существенной потере прочностных свойств полимерного композита.</p></trans-abstract><kwd-group xml:lang="en"><kwd>PCM</kwd><kwd>fiberglass</kwd><kwd>destruction</kwd><kwd>acoustic emission</kwd><kwd>clustering</kwd><kwd>optical microscopy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ПКМ</kwd><kwd>стеклопластик</kwd><kwd>разрушение</kwd><kwd>акустическая эмиссия</kwd><kwd>кластеризация</kwd><kwd>оптическая микроскопия</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The research is carried out under the financial support of the Russian Science Foundation, project No. 21-19-00896.</funding-statement><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке Российского научного фонда, проект № 21-19-00896.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Zarif Karimi N., Minak G., Kianfar P. 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