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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">mais</journal-id><journal-title-group><journal-title xml:lang="ru">Моделирование и анализ информационных систем</journal-title><trans-title-group xml:lang="en"><trans-title>Modeling and Analysis of Information Systems</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1818-1015</issn><issn pub-type="epub">2313-5417</issn><publisher><publisher-name>Yaroslavl State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18255/1818-1015-2016-3-298-308</article-id><article-id custom-type="elpub" pub-id-type="custom">mais-343</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>Оригинальные статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Articles</subject></subj-group></article-categories><title-group><article-title>Численное моделирование процессов формирования полос адиабатического сдвига в композитах</article-title><trans-title-group xml:lang="en"><trans-title>Numerical Simulation of Adiabatic Shear Bands Formation in Composites</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>Кудряшов</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kudryashov</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р. физ.-мат. наук, профессор, Каширское шоссе, 31, Москва, 115409, Россия</p></bio><bio xml:lang="en"><p>PhD, Dr. Sci., professor, Kashirskoe shosse, 31, Moscow, 115409, Russia</p></bio><email xlink:type="simple">nakudr@gmail.com</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>Муратов</surname><given-names>Р. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Muratov</surname><given-names>R. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>студент, Каширское шоссе, 31, Москва, 115409, Россия</p></bio><bio xml:lang="en"><p>graduate student, Kashirskoe shosse, 31, Moscow, 115409, Russia</p></bio><email xlink:type="simple">rodyon-mur@yandex.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>Рябов</surname><given-names>П. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Ryabov</surname><given-names>P. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, Каширское шоссе, 31, Москва, 115409, Россия</p></bio><bio xml:lang="en"><p>PhD, Kashirskoe shosse, 31, Moscow, 115409, Russia</p></bio><email xlink:type="simple">pnryabov31@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский ядерный университет МИФИ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National research nuclear university MEPhI</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>20</day><month>06</month><year>2016</year></pub-date><volume>23</volume><issue>3</issue><fpage>298</fpage><lpage>308</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кудряшов Н.А., Муратов Р.В., Рябов П.Н., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Кудряшов Н.А., Муратов Р.В., Рябов П.Н.</copyright-holder><copyright-holder xml:lang="en">Kudryashov N.A., Muratov R.V., Ryabov P.N.</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.mais-journal.ru/jour/article/view/343">https://www.mais-journal.ru/jour/article/view/343</self-uri><abstract><p>В работе рассматривается процесс локализации пластической деформации в композитном материале, состоящем из сваренных стальной и медной пластины при сдвиговых деформациях. Сформулирована математическая модель данного физического процесса. Для проведения вычислительных экспериментов предложен новый численный алгоритм, основанный на схеме Куранта–Изаксона–Риса. Данный алгоритм верифицирован на трех тестовых задачах. Его работоспособность и эффективность подтверждена в результате проведенных тестов. С использованием предложенного алгоритма проведено численное моделирование процессов локализации пластической деформации в композитных материалах. Исследовано влияние граничных условий, начальной скорости пластической деформации и ширины материалов, входящих в композитный блок, на процесс локализации. Показано, что на начальном этапе скорость сдвига слоев материала колеблется. Предложены теоретические оценки частоты и периода колебаний, расчеты по которым полностью согласуются с численным экспериментом. Установлено, что деформация локализуется в медной части композита. В зависимоcти от ширины стальной и медной части, а также начальной скорости пластической деформации и выбранного типа граничных условий, возникает одна или две области локализции, расположенные на характерном расстоянии от границ. Показана зависимость данного расстояния от начальной скорости пластической деформации, и получены соответствующие оценки для двух типов граничных условий. Установлено, что при возникновении двух областей локализации в одной из них температура и деформация растет существенно быстрее, чем в другой, тогда как на начальном этапе данные величины совпадают в этих областях.</p></abstract><trans-abstract xml:lang="en"><p>The process of plastic ﬂow localization under shear deformations of a composite material consisting from welded steel and copper is studied. A mathematical model describing this physical process is proposed. A new numerical approach based on Courant–Isaacson–Rees scheme is suggested. This algorithm was veriﬁed using three benchmark problems. Operability and eﬀectiveness of this algorithm is conﬁrmed. A numerical simulation of plastic ﬂow localization in composite materials is performed. The inﬂuence on localization process of boundary conditions, of initial strain rate and materials width is studied. It is shown that at the initial stage the shear velocity of material layers oscillates. Theoretical estimates of frequency and oscillation period is given. Computational results coincide with these estimates. It is found that plastic ﬂow localizes in the copper part of the composite. One or two areas of plastic ﬂow localization appears depending on the width of steel and copper parts, as well as on the initial plastic strain rate and the selected type of a boundary conditions. The areas locate on characteristic distance from borders. The dependence of this distance and initial strain rate is shown and the corresponding estimates are obtained for two types of boundary conditions. When two areas of localization are formed, in one of them the temperature and the deformation increas faster than in another one.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>полоса сдвига</kwd><kwd>локализация деформации</kwd><kwd>пластическая деформация</kwd><kwd>численное моделирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>shear band</kwd><kwd>deformation localization</kwd><kwd>plastic deformation</kwd><kwd>numerical simulation</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">Schneider J., Nunes J. A., “Characterization of plastic ﬂow and resulting microtextures in a friction stir weld”, Metall. Mater. Trans. B., 35 (2004), 777–783.</mixed-citation><mixed-citation xml:lang="en">Schneider J., Nunes J. A., “Characterization of plastic ﬂow and resulting microtextures in a friction stir weld”, Metall. Mater. Trans. 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