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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">donstu</journal-id><journal-title-group><journal-title xml:lang="en">Advanced Engineering Research (Rostov-on-Don)</journal-title><trans-title-group xml:lang="ru"><trans-title>Advanced Engineering Research (Rostov-on-Don)</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2687-1653</issn><publisher><publisher-name>Don State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.23947/2687-1653-2023-23-4-387-397</article-id><article-id custom-type="edn" pub-id-type="custom">LRSXPY</article-id><article-id custom-type="elpub" pub-id-type="custom">donstu-2109</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="en"><subject>MACHINE BUILDING AND MACHINE SCIENCE</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МАШИНОСТРОЕНИЕ И МАШИНОВЕДЕНИЕ</subject></subj-group></article-categories><title-group><article-title>Effect of Glass Fiber Reinforcement on the Mechanical Properties of Polyester Composites</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние армирования стекловолокном на механические свойства полиэстерных композитов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8141-9529</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Антибас</surname><given-names>И. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Antipas</surname><given-names>I. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Имад Ризакалла Антибас, кандидат технических наук, доцент кафедры основ конструирования машин, <ext-link xlink:href="https://www.scopus.com/authid/detail.uri?authorId=57191988834" ext-link-type="uri">ScopusID</ext-link>, <ext-link xlink:href="https://www.webofscience.com/wos/author/record/1032376" ext-link-type="uri">ResearchID</ext-link></p><p>344003, г. Ростов-на-Дону, пл. Гагарина, 1</p></bio><bio xml:lang="en"><p>Imad Rizakalla Antipas, Cand.Sci. (Eng.), Associate Professor of the Fundamentals of Machinery Design Department, <ext-link xlink:href="https://www.scopus.com/authid/detail.uri?authorId=57191988834" ext-link-type="uri">ScopusID</ext-link>, <ext-link xlink:href="https://www.webofscience.com/wos/author/record/1032376" ext-link-type="uri">ResearchID</ext-link></p><p>1, Gagarin sq., Rostov-on-Don, 344003</p></bio><email xlink:type="simple">Imad.antypas@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Донской государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Don State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>27</day><month>12</month><year>2023</year></pub-date><volume>23</volume><issue>4</issue><fpage>387</fpage><lpage>397</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Antipas I.R., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Антибас И.Р.</copyright-holder><copyright-holder xml:lang="en">Antipas I.R.</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.vestnik-donstu.ru/jour/article/view/2109">https://www.vestnik-donstu.ru/jour/article/view/2109</self-uri><abstract><sec><title>Introduction</title><p>Introduction. Glass fibers significantly improve the quality of composite materials, make them lighter, stronger, more corrosion resistant and thermally stable. Strengths and weaknesses of specific composites are actively discussed in the scientific and applied literature. At the same time, the effect of the ratio of fibers and matrix material on the mechanical characteristics of composites has not been sufficiently investigated. The presented study is intended to fill this gap. The work is aimed at manufacturing a composite material on a polymer basis reinforced with glass fiber, and investigating the influence of weight ratios of elements on the mechanical characteristics of the composite. For the first time, a report on the comparison of the characteristics of composites (with different fiber content) to each other and to steel is published.</p></sec><sec><title>Materials and Methods</title><p>Materials and Methods. Fiberglass and polyester were used as starting materials with the addition of a mediator to speed up the molding process. The samples were made manually and tested for tensile strength, hardness, and impact strength using standard equipment. The results were summarized in the form of tables, visualized in the form of graphs, and processed by comparative analysis.</p></sec><sec><title>Results</title><p>Results. The technique of creating samples and methods of their testing were described. The research showed that hardness, tensile strength and impact resistance increased with a growth in the percentage of randomly distributed fiberglass to 50% with 50% unsaturated polyester. In this case, the maximum values of tensile strength — 175.4 MPa, hardness — 38 HV and impact resistance — 1.56 J/mm2 were obtained. The inexpediency of exceeding the proportion of fiberglass by more than 50% was experimentally proven, since mechanical properties deteriorated. This was due, in particular, to the fragility of the glass, which, if the proportions were violated, was transmitted to the entire composite. In addition, with an excessively high volume of reinforcing fibers, the resin was not enough for high-quality bonding of the elements, which significantly reduced the strength of the material. Most of the mechanical characteristics of a composite made of 50% polyester and 50% fiberglass are better than those of steel.</p><p>Discussion and Conclusion. It has been proved that the properties of the composite material depend significantly on the glass fiber content. The resulting composite was compared to steel. It turned out that it had better mechanical characteristics and less weight. This allows us to recommend the material for boat hulls.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>Введение</title><p>Введение. Стекловолокна существенно улучшают качество композитных материалов, делают их легче, прочнее, устойчивее к коррозии и термически стабильнее. В научной и прикладной литературе активно обсуждаются сильные и слабые стороны конкретных композитов. При этом недостаточно исследовано влияние соотношения волокон и материала матрицы на механические характеристики композитов. Представленная работа призвана восполнить этот пробел. Цели исследования — изготовление композиционного материала на полимерной основе, армированного стекловолокном, а также изучение влияния весовых соотношений элементов на механические характеристики композита. Впервые публикуется отчет о сопоставлении характеристик композитов (с различным содержанием волокна) друг с другом и со сталью.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. В качестве исходных материалов использовались стекловолокно и полиэстер с добавлением медиатора для ускорения процесса формования. Образцы изготавливались вручную и при помощи стандартного оборудования испытывались на растяжение, твердость и ударную прочность. Результаты обобщали в виде таблиц, визуализировали в виде графиков и обрабатывали методом сравнительного анализа.</p></sec><sec><title>Результаты исследования</title><p>Результаты исследования. Показаны способ создания образцов и методы их испытаний. Изыскания позволили установить, что твердость, прочность на разрыв и устойчивость к удару возрастают с увеличением процентного содержания случайно распределенного стекловолокна до 50 % при 50 % ненасыщенного полиэстера. В этом случае достигаются максимальные значения прочности на разрыв — 175,4 МПа, твердости — 38 HV и ударопрочности — 1,56 Дж/мм2. Экспериментально доказана нецелесообразность превышения доли стекловолокна более чем на 50 %, т. к. механические свойства ухудшаются. Это объясняется, в частности, хрупкостью стекла, которая при нарушении пропорций передается всему композиту. Кроме того, при чрезмерно высоком объеме армирующих волокон смолы будет недостаточно для качественного скрепления элементов, что существенно снизит прочность материала. Большинство механических характеристик композита из 50 % полиэстера и 50 % стекловолокна лучше, чем у стали.</p></sec><sec><title>Обсуждение и заключение</title><p>Обсуждение и заключение. Доказано, что свойства композитного материала существенно зависят от содержания стекловолокна. Полученный композит сравнили со сталью. Выяснилось, что он обладает лучшими механическими характеристиками и меньшим весом. Это позволяет рекомендовать использовать данный материал для изготовления корпусов лодок.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>армирование стекловолокном</kwd><kwd>соотношение полиэстера и стекловолокна в композите</kwd><kwd>механические характеристики композита</kwd><kwd>сравнение композитных и стальных образцов</kwd></kwd-group><kwd-group xml:lang="en"><kwd>glass fiber reinforcement</kwd><kwd>ratio of polyester to glass fiber in a composite</kwd><kwd>mechanical characteristics of a composite</kwd><kwd>comparison of composite and steel samples</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Автор выражает благодарность редакции и рецензентам за внимательное отношение к статье и замечания, которые позволили повысить ее качество.</funding-statement><funding-statement xml:lang="en">The author would like to thank the Editorial board of the journal and the reviewers for their attentive attitude to the article, and comments that helped to improve the quality of the article.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Kumar S.N., Kumar V.G., Kumar V.C., Prabhu M. 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