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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Doklady Physics</journal-id><journal-title-group><journal-title xml:lang="en">Doklady Physics</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Российской академии наук. Физика, технические науки</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2686-7400</issn><issn publication-format="electronic">3034-5081</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">697844</article-id><article-id pub-id-type="doi">10.7868/S3034508125050102</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>МЕХАНИКА</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">EXPANSIONS IN PAPKOVICH—FADLE FUNCTIONS IN THE PROBLEM FOR A HALF-STRIP WITH A CLAMPED END</article-title><trans-title-group xml:lang="ru"><trans-title>РАЗЛОЖЕНИЯ ПО ФУНКЦИЯМ ПАПКОВИЧА–ФАДЛЯ В ЗАДАЧЕ ДЛЯ ПОЛУПОЛОСЫ С ЗАЩЕМЛЕННЫМ ТОРЦОМ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kovalenko</surname><given-names>M. D.</given-names></name><name xml:lang="ru"><surname>Коваленко</surname><given-names>М. Д.</given-names></name></name-alternatives><email>kov08@inbox.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kerzhaev</surname><given-names>A. P.</given-names></name><name xml:lang="ru"><surname>Кержаев</surname><given-names>А. П.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Menshova</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Меньшова</surname><given-names>И. В.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Vlasov</surname><given-names>D. A.</given-names></name><name xml:lang="ru"><surname>Власов</surname><given-names>Д. А.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Applied Mechanics, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт прикладной механики Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт теории прогноза землетрясений и математической геофизики Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Bauman Moscow State Technical University</institution></aff><aff><institution xml:lang="ru">Московский государственный технический университет имени Н.Э. Баумана</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Moscow State University of Civil Engineering</institution></aff><aff><institution xml:lang="ru">Московский государственный строительный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-09-15" publication-format="electronic"><day>15</day><month>09</month><year>2025</year></pub-date><volume>524</volume><issue>1</issue><issue-title xml:lang="en">VOL 524, NO1 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 524, №1 (2025)</issue-title><fpage>63</fpage><lpage>68</lpage><history><date date-type="received" iso-8601-date="2025-12-05"><day>05</day><month>12</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-09-15"/></permissions><self-uri xlink:href="https://jdigitaldiagnostics.com/2686-7400/article/view/697844">https://jdigitaldiagnostics.com/2686-7400/article/view/697844</self-uri><abstract xml:lang="en"><p>In this paper, we construct an exact solution to the well-known boundary value problem of the theory of elasticity on the tension of a free half-strip with a rigidly clamped end. The solution is represented by series in Papkovich—Fadle eigenfunctions, the coefficients of which are determined in an explicit form. The solution is based on the Papkovich orthogonality relation and Lagrange expansions. The behavior of stresses near the corner points of the half-strip is investigated. A comparison of the exact solution and numerical one obtained on the basis of the finite element method is given.</p></abstract><trans-abstract xml:lang="ru"><p>Построено точное решение известной краевой задачи теории упругости о растяжении свободной полуполосы с жестко защемленным торцом. Решение представляется рядами по собственным функциям Папковича–Фадля, коэффициенты которых определяются в явной форме. В основе решения лежит соотношение ортогональности Папковича и разложения Лагранжа. Исследован характер поведения напряжений вблизи угловых точек полуполосы. Дано сравнение точного решения и численного, полученного на основе метода конечных элементов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>end-clamped half-strip</kwd><kwd>Papkovich—Fadle eigenfunctions</kwd><kwd>Papkovich orthogonality relation</kwd><kwd>Lagrange expansions</kwd><kwd>exact solution</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>полуполоса с защемленным торцом</kwd><kwd>собственные функции Папковича–Фадля</kwd><kwd>соотношение ортогональности Папковича</kwd><kwd>разложения Лагранжа</kwd><kwd>точное решение</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено за счет гранта Российского научного фонда № 25-21-00257, https://rscf.ru/project/25-21-00257/</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Bogy D.B. Solution of the plane end problem for a semi-infinite elastic strip // Z. Angew. Math. Phys. 1975. V. 26. 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