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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">10.26896/1028-6861-2021-87-10-44-53</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-1507</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 МАТЕРИАЛОВ: ПРОЧНОСТЬ, РЕСУРС, БЕЗОПАСНОСТЬ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MECHANICAL TESTING METHODS</subject></subj-group></article-categories><title-group><article-title>Оценка вероятности усталостного разрушения конструкционных элементов с учетом разброса начальных размеров трещин при детерминированном и случайном характерах нагружения</article-title><trans-title-group xml:lang="en"><trans-title>Assessment of the probability of the fatigue fracture of structural components subjected to deterministic and stochastic loading taking into account the scatter in the initial crack size</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>Матвиенко</surname><given-names>Ю. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Matvienko</surname><given-names>Yu. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юрий Григорьевич Матвиенко</p><p>101990, Москва, Малый Харитоньевский пер., д. 4</p></bio><bio xml:lang="en"><p>Yuri G. Matvienko</p><p>4, Maly Kharitonievsky per., Moscow, 101990</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Резников</surname><given-names>Д. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Reznikov</surname><given-names>D. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дмитрий Олегович Резников</p><p>101990, Москва, Малый Харитоньевский пер., д. 4</p></bio><bio xml:lang="en"><p>Dmitry O. Reznikov</p><p>4, Maly Kharitonievsky per., Moscow, 101990</p></bio><email xlink:type="simple">mibsts@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>Кузьмин</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuzmin</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дмитрий Александрович Кузьмин</p><p>109507, Москва, ул. Ферганская, д. 25</p></bio><bio xml:lang="en"><p>Dmitry A. Kuzmin</p><p>25, Ferganskaya ul., Moscow, 109507</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Потапов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Potapov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Вячеславович Потапов</p><p>109507, Москва, ул. Ферганская, д. 25</p></bio><bio xml:lang="en"><p>Vladimir V. Potapov</p><p>25, Ferganskaya ul., Moscow, 109507</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт машиноведения им. А. А. Благонравова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A. A. Blagonravov Mechanical Engineering Research Institute, RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт по эксплуатации атомных электростанций</institution><country>Россия</country></aff><aff xml:lang="en"><institution>All-Russian Research Institute for Nuclear Power Plants Operation</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>18</day><month>10</month><year>2021</year></pub-date><volume>87</volume><issue>10</issue><fpage>44</fpage><lpage>53</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Матвиенко Ю.Г., Резников Д.О., Кузьмин Д.А., Потапов В.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Матвиенко Ю.Г., Резников Д.О., Кузьмин Д.А., Потапов В.В.</copyright-holder><copyright-holder xml:lang="en">Matvienko Y.G., Reznikov D.O., Kuzmin D.A., Potapov V.V.</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/1507">https://www.zldm.ru/jour/article/view/1507</self-uri><abstract><p>Представлен аналитический подход, позволяющий получать консервативные оценки вероятности хрупкого усталостного разрушения конструкционных элементов технических систем, учитывающий разброс начальных размеров трещиноподобных дефектов, который описывается экспоненциальным вероятностным распределением. При этом процесс эксплуатационного нагружения рассмотрен как детерминированный (исследованы циклы нагружения с постоянными амплитудой и частотой), и как случайный (изучен стационарный узкополосный гауссов случайный процесс нагружения). Кинетика трещины описана модифицированным уравнением Пэриса, учитывающим асимметрию циклов нагружения. Константы уравнения Пэриса положены детерминированными величинами. Приведен пример расчета вероятности усталостного разрушения элемента линейного участка трубопровода, содержащего осевую трещину на внутренней поверхности и нагруженного внутренним давлением. Оценены результаты расчета, получаемые с учетом и без учета случайной природы эксплуатационного нагружения. Сделан вывод о том, что исключение из рассмотрения случайного характера эксплуатационного нагружения приводит к получению неконсервативных оценок вероятности усталостного разрушения, которые могут отличаться на порядок от данных расчета, учитывающего стохастическую природу процесса нагружения. Представленный подход может быть использован при реализации вероятностного и риск-ориентированного подходов к обеспечению прочности, ресурса и безопасности технических систем в реальных условиях эксплуатации и корректировке типовых программ эксплуатации с точки зрения выбора периодичности и объема неразрушающего контроля.</p></abstract><trans-abstract xml:lang="en"><p>An analytical approach which provides conservative estimates of the probability of fatigue brittle fracture of structural components of technical systems taking into account the scatter of the initial dimensions of crack-like defects described by the exponent probabilistic distribution is presented. The operational loading is considered both as deterministic (with loading cycles of constant amplitude and frequency) and random (stationary narrow-band Gaussian random loading) process. The crack growth kinetics is described by the modified Paris equation that takes into account the stress ratio effects. The parameters of the Paris law are considered deterministic values. An example of the assessment of the probability of fatigue failure of tubular structural component with an axial crack on the inner surface of a tube subjected to internal pressure is presented. A comparative analysis of the results obtained with and without taking into account the random nature of the operational loading is carried out. It is shown that neglection of the random nature of the operational loading leads to non-conservative estimates of the fatigue failure probability, which may differ by an order of magnitude compared to the calculation data obtained with allowance for the stochastic nature of the loading process. The developed method can be used in the implementation of probabilistic and risk-based approaches to ensuring strength, service life and safety of technical systems in real operation conditions and in adjusting standard operation programs in terms of choosing the frequency and scope of non-destructive testing.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>прочность</kwd><kwd>вероятность разрушения</kwd><kwd>дефект</kwd><kwd>трещиностойкость</kwd><kwd>случайный процесс</kwd></kwd-group><kwd-group xml:lang="en"><kwd>strength</kwd><kwd>probability of fracture</kwd><kwd>defect</kwd><kwd>crack resistance</kwd><kwd>random process</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">Махутов Н. А., Резников Д. О. Комплексный анализ прочности и безопасности потенциально опасных объектов с учетом неопределенностей / Надежность. 2020. № 1. С. 47 – 56. 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