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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">10.26896/1028-6861-2020-86-9-52-62</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-1279</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>ИССЛЕДОВАНИЕ СТРУКТУРЫ И СВОЙСТВ. МЕХАНИКА МАТЕРИАЛОВ: ПРОЧНОСТЬ, РЕСУРС, БЕЗОПАСНОСТЬ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TESTING OF STRUCTURE AND PARAMETERS. MECHANICAL TESTING METHODS</subject></subj-group></article-categories><title-group><article-title>Эволюция параметров механики разрушения в окрестности отверстия при малоцикловой усталости по данным моделирования трещины узкими надрезами</article-title><trans-title-group xml:lang="en"><trans-title>Evolution of the fracture mechanics parameters in the vicinity of the hole in conditions of low-cycle fatigue according to the data of modeling a crack with narrow notches</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>Елеонский</surname><given-names>С. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Eleonsky</surname><given-names>S. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Святослав Игоревич Елеонский</p></bio><bio xml:lang="en"><p>Svyatoslav I. Eleonsky</p><p>1 Zhukovskogo ul., Zhukovsky, Moscow obl., 140180</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>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>Yury G. Matvienko</p><p>4, Malyj Khariton’evsky per., Moscow, 101990</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>Писарев</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Pisarev</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Сергеевич Писарев</p><p>140180, Московская область, Жуковский, ул. Жуковского, д. 1</p></bio><bio xml:lang="en"><p>Vladimir S. Pisarev</p><p>1 Zhukovskogo ul., Zhukovsky, Moscow obl., 140180</p></bio><email xlink:type="simple">VSP5335@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>Чернов</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Chernov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Андрей Владимирович Чернов</p><p>140180, Московская область, Жуковский, ул. Жуковского, д. 1</p></bio><bio xml:lang="en"><p>Andrey V. Chernov</p><p>1 Zhukovskogo ul., Zhukovsky, Moscow obl., 140180</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Центральный аэрогидродинамический институт имени профессора Н.Е. Жуковского</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N.E. Zhukovsky Central AeroHydrodynamics Institute</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт машиноведения им. А.А. Благонравова, Российская академия наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Mechanical Engineering Research Institute of the Russian Academy of Science</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>13</day><month>09</month><year>2020</year></pub-date><volume>86</volume><issue>9</issue><fpage>52</fpage><lpage>62</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Елеонский С.И., Матвиенко Ю.Г., Писарев В.С., Чернов А.В., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Елеонский С.И., Матвиенко Ю.Г., Писарев В.С., Чернов А.В.</copyright-holder><copyright-holder xml:lang="en">Eleonsky S.I., Matvienko Y.G., Pisarev V.S., Chernov A.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/1279">https://www.zldm.ru/jour/article/view/1279</self-uri><abstract><p>Предложен новый метод исследования влияния малоцикловой усталости на эволюцию величин параметров механики разрушения при нагружении плоских образцов с концентраторами напряжений. Рассмотрены три программы нагружения с постоянным значением размаха напряжений и различными коэффициентами асимметрии цикла, а также две программы с постоянным коэффициентом асимметрии и различными величинами размаха напряжений цикла. Одна программа — общая для обоих случаев. Все программы включают одноосное растяжение-сжатие. Каждую программу реализовывали путем испытания партии одинаковых образцов — от семи до девяти в каждой. Один образец из партии был предназначен для оценки долговечности. В рамках каждой программы остальные образцы доводили до различных стадий малоцикловой усталости. Экспериментальные данные получали для трещин различной длины, которые моделировали последовательностью из трех узких надрезов, начинающихся от сквозного отверстия в прямоугольном образце. Деформационный отклик на малое приращение длины надреза при постоянной внешней нагрузке измеряли с помощью метода электронной спекл-интерферометрии. Исходная экспериментальная информация — картины интерференционных полос, которые обеспечивали определение тангенциальных компонент перемещений непосредственно на берегах надреза. Таким образом, величины раскрытия надреза определяли по результатам прямых измерений. От измеренных перемещений к величинам коэффициентов интенсивности напряжений (КИН) и T-напряжений переходили с помощью соотношений модифицированной версии метода последовательного наращивания длины трещины, которые основаны на формулировке Уильямса. Получены распределения параметров механики разрушения по длине надрезов на различных этапах циклического нагружения. На этой основе построены зависимости величин раскрытия, КИН и T-напряжений для надрезов фиксированной длины от количества циклов нагружения. Установлено, что экспериментальные распределения величин КИН по периоду долговечности практически совпадают для всех четырех комбинаций параметров цикла нагружения.</p></abstract><trans-abstract xml:lang="en"><p>We propose a new method for studying the effect of low-cycle fatigue on the evolution of the fracture mechanics parameters in conditions of loading plane specimens with stress concentrators. Three programs of loading with a constant value of the stress range and different values of the stress ratio, as well as two programs with a constant value of the stress ratio but different stress ranges are considered. One program is common for both cases. All the programs include uniaxial tension-compression. Each program was implemented by testing a batch of the same specimens from seven to nine in each. One specimen from each batch was assigned to assess the durability. The other specimens were brought to various stages of low-cycle fatigue in each program. Experimental data were obtained for cracks of different length which were modeled by a sequence of three narrow notches launched from a through hole in a rectangular specimen. Each notch was exposed to constant external load of the same level. The deformation response to a small increment in the notch length at a constant external load was measured at different stages of low-cycle fatigue using electronic speckle pattern interferometry. The interference fringe patterns used as initial experimental data provided determination of the tangential components of in-plane displacements directly on the notch sides and the values of notch opening were thus determined from the results of direct measurements. The transition from measured displacement components to the values of the stress intensity factor and T-stress was performed using the relationships of a modified version of the crack compliance method based on Williams formulation. Distributions of the fracture mechanics parameters along the notches were obtained at various stages of cyclic loading. The dependences of the crack mouth opening displacement, the stress intensity factor and the T-stress on the number of loading cycles are constructed for the notches of a fixed length at different stages of low-cycle fatigue. It is shown that experimental distributions of the stress intensity factor values over the life time practically coincide for all four combinations of the loading cycle parameters.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>малоцикловая усталость</kwd><kwd>метод последовательного наращивания длины трещины</kwd><kwd>параметры механики разрушения</kwd><kwd>электронная спекл-интерферометрия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>low-cycle fatigue</kwd><kwd>crack compliance method</kwd><kwd>fracture mechanics parameters</kwd><kwd>electronic speckle pattern interferometry</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках Программы со¬вместных фундаментальных исследований по авиационно-космическим технологиям ФГУП «ЦАГИ» и институтов РАН на 2019 - 2020 гг., а также при поддержке Российского научного фон¬да (проект № 18-19-00351)</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">Makhutov N. 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