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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">matmess</journal-id><journal-title-group><journal-title xml:lang="ru">Математические заметки СВФУ</journal-title><trans-title-group xml:lang="en"><trans-title>Mathematical notes of NEFU</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2411-9326</issn><issn pub-type="epub">2587-876X</issn><publisher><publisher-name>Северо-Восточный федеральный университет имени М.К. Аммосова</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25587/SVFU.2018.1.12770</article-id><article-id custom-type="elpub" pub-id-type="custom">matmess-300</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>МАТЕМАТИКА</subject></subj-group></article-categories><title-group><article-title>ЗАДАЧА СОПРЯЖЕНИЯ УПРУГОГО ВКЛЮЧЕНИЯ ТИМОШЕНКО И ПОЛУЖЕСТКОГО ВКЛЮЧЕНИЯ</article-title><trans-title-group xml:lang="en"><trans-title>ON JUNCTION PROBLEM FOR ELASTIC TIMOSHENKO INCLUSION AND SEMI–RIGID INCLUSION</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>Хлуднев</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Khludnev</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хлуднев Александр Михайлович</p><p>Институт гидродинамики им. М. А. Лаврентьева СО РАН, пр. Акад. Лаврентьева, 15, Новосибирск 630090;</p><p>Новосибирский гос. университет, ул. Пирогова, 1, Новосибирск 630090 </p></bio><bio xml:lang="en"><p>Alexander M. Khludnev</p><p>Lavrentiev Institute of Hydrodynamics, 15 Lavrentiev Avenue, Novosibirsk 630090, Russia;</p><p>Novosibirsk State University, 1 Pirogov Street, Novosibirsk, 630090, Russia</p></bio><email xlink:type="simple">khlud@hydro.nsc.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>Попова</surname><given-names>Т. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Popova</surname><given-names>T. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Попова Татьяна Семеновна</p><p>Северо-Восточный Федеральный университет им. М.К. Аммосова, ул. Белинского, 58, Якутск 677000 </p></bio><bio xml:lang="en"><p>Tatyana S. Popova</p><p>M. K. Ammosov North-Eastern Federal University, 58 Belinsky Street, Yakutsk 677000, Russia </p></bio><email xlink:type="simple">ptsokt@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт гидродинамики им. М. А. Лаврентьева СО РАН;&#13;
Новосибирский гос. университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lavrentiev Institute of Hydrodynamics;&#13;
Novosibirsk State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Северо-Восточный Федеральный университет им. М.К. Аммосова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>M. K. Ammosov North-Eastern Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>12</day><month>05</month><year>2026</year></pub-date><volume>25</volume><issue>1</issue><fpage>73</fpage><lpage>89</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Хлуднев А.М., Попова Т.С., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Хлуднев А.М., Попова Т.С.</copyright-holder><copyright-holder xml:lang="en">Khludnev A.M., Popova T.S.</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://matmess.elpub.ru/jour/article/view/300">https://matmess.elpub.ru/jour/article/view/300</self-uri><abstract><p>Исследуется краевая задача, описывающая равновесие двумерного упругого тела с двумя тонкими сопрягающимися включениями при наличии отслоения. При этом одно из включений является упругим, а другое — полужестким. Наличие отслоения означает существование трещины между включениями и упругим телом. На берегах трещины задаются нелинейные краевые условия вида неравенств, которые не позволяют противоположным берегам трещин проникать друг в друга. Указанные краевые условия приводят к формулировке проблемы в виде задачи с неизвестным множеством контакта. Приведена как дифференциальная постановка в виде краевой задачи, так и вариационная постановка в виде задачи минимизации функционала энергии на выпуклом множестве допустимых перемещений. Обоснована однозначная разрешимость поставленной задачи. Показана эквивалентность дифференциальной и вариационной постановок. Исследован предельный переход по параметру жесткости тонкого упругого включения. Найдены условия сопряжения как для исходной задачи, так и для предельной. </p></abstract><trans-abstract xml:lang="en"><p>An equilibrium problem for elastic bodies with a thin elastic inclusion and a thin semi-rigid inclusion is investigated. The inclusions are assumed to be delaminated from the elastic bodies, forming therefore a crack between the inclusions and the elastic matrix. Nonlinear boundary conditions are considered at the crack faces to prevent mutual penetration between the crack faces. The inclusions have a joint point. We present both differential formulation in the form of a boundary value problem and a variational formulation in the form of a minimization problem for an energy functional on a convex set of admissible displacements. The unique solvability of the problem is substantiated. Equivalence of differential and variational statements is shown. Passage to the limit is investigated as the rigidity parameter of the elastic inclusion goes to infinity. The limit model is analyzed. Junction boundary conditions are found at the joint point for the considered problem as well as for the limit problem. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>включение Тимошенко</kwd><kwd>полужесткое включение</kwd><kwd>упругое тело</kwd><kwd>трещина</kwd><kwd>нелинейные краевые условия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Timoshenko inclusion</kwd><kwd>semi-rigid inclusion</kwd><kwd>elastic body</kwd><kwd>crack</kwd><kwd>nonlinear boundary conditions</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">Khludnev A. M., Negri M. Crack on the boundary of a thin elastic inclusion inside an elastic body // Z. Angew. Math. Mech. 2012. V. 92. N 5. P. 341–354.</mixed-citation><mixed-citation xml:lang="en">Khludnev A. M., Negri M. Crack on the boundary of a thin elastic inclusion inside an elastic body // Z. Angew. Math. Mech. 2012. 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