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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">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2025-26-4-302-315</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-2086</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>Статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Article</subject></subj-group></article-categories><title-group><article-title>Разработка и верификация методики конкретизации определяющего соотношения Мурнагана</article-title><trans-title-group xml:lang="en"><trans-title>Development and verification of a methodology for Murnaghan’s defining relation сoncretization</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>Козлов</surname><given-names>Виктор Вячеславович</given-names></name><name name-style="western" xml:lang="en"><surname>Kozlov</surname><given-names>Victor Vyacheslavovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук</p></bio><bio xml:lang="en"><p>candidate of physical and mathematical sciences</p></bio><email xlink:type="simple">vvkozlovtsu@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>Филатова</surname><given-names>Александра Вячеславовна</given-names></name><name name-style="western" xml:lang="en"><surname>Filatova</surname><given-names>Alexandra Vyacheslavovna</given-names></name></name-alternatives><bio xml:lang="ru"><p>магистр, лаборант-исследователь</p></bio><bio xml:lang="en"><p>master of sciences, research laboratory assistant</p></bio><email xlink:type="simple">filatovasasha-1@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тульский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tula State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Тульский педагогический университет имени Л. Н. Толстого</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tula State Lev Tolstoy Pedagogical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>29</day><month>12</month><year>2025</year></pub-date><volume>26</volume><issue>4</issue><fpage>302</fpage><lpage>315</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Козлов В.В., Филатова А.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Козлов В.В., Филатова А.В.</copyright-holder><copyright-holder xml:lang="en">Kozlov V.V., Filatova 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.chebsbornik.ru/jour/article/view/2086">https://www.chebsbornik.ru/jour/article/view/2086</self-uri><abstract><p>В статье описана методика конкретизации определяющего соотношения Мурнагана, включающего в себя пять материальных констант, с помощью задачи об однородном одноосном растяжении (сжатии) образца, выполненного из нелинейно-упругого материала.Предлагаемая методика основана на использовании экспериментально наблюдаемых значений осевой нагрузки и поперечных удлинений призматического образца в зависимости от его осевого удлинения. Экспериментальные кривые аппроксимируются теоретическими зависимостями, следующими из решения задачи растяжения-сжатия в рамках рассматриваемого определяющего соотношения. Из требования минимальных отличий между экспериментальными и теоретическими данными с помощью метода наименьших квадратов определяются материальные константы. В работе описано автоматизированное с помощью языка программирования python проведение численного эксперимента, данные которого использовались для демонстрирования выполнения предложенной конкретизации определяющего соотношения Мурнагана. Численный эксперимент был проведен в отечественномпакете прочностного анализа CAE Fidesys. Осуществлена проверка корректности предложенной методики с помощью сравнения экспериментальных данных и теоретических,полученных для материальных констант, определенных в рамках представленных алгоритмов конкретизации определяющего соотношения Мурнагана.</p></abstract><trans-abstract xml:lang="en"><p>In paper the methodology of concretization of five-constant Murnaghan’s defining relation is described, using the problem of homogeneous uniaxial tension (compression) of a samplemade of a nonlinear elastic material. The methodology is based on the use of experimentally observed values of axial load and transverse elongation of a prismatic sample as a functionof its axial elongation. The experimental curves are approximated by theoretical dependences following from the solution of the tensile-compression problem within the framework of theconsidered constitutive relation. Material constants are determined from the requirement of minimal differences between experimental and theoretical data using the least squares method. Аn automated numerical experiment using the python programming language is described. The collected data was used to demonstrate the performance of the proposed concretization of Murnaghan’s defining relation. The numerical experiment was carried out in the local strength analysis package CAE Fidesys. The correctness of the proposed methodology was verified by comparing experimental data and theoretical data obtained for material constants determined within the framework of the presented algorithms for the concretization of the Murnaghan’s defining relation.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>методика конкретизации определяющего соотношения</kwd><kwd>материал Мурнаган</kwd><kwd>одноосное растяжение</kwd><kwd>нелинейно-упругий материал</kwd><kwd>CAE Fidesys</kwd><kwd>python</kwd><kwd>численный эксперимент.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>methodology of concretization of the defining relation</kwd><kwd>Murnaghan’s material</kwd><kwd>uniaxial tension</kwd><kwd>nonlinear elastic material</kwd><kwd>CAE Fidesys</kwd><kwd>python</kwd><kwd>numerical experiment.</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания Министерства просвещения РФ соглашение № 073- 00033-24-01 от 09.02.2024 тема научного исследования «Теоретико-численные методы в приближенном анализе и их приложения в механике и физике».</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">Cowley J., Mulholland A., Gachagan A. 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