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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">pimi</journal-id><journal-title-group><journal-title xml:lang="ru">Приборы и методы измерений</journal-title><trans-title-group xml:lang="en"><trans-title>Devices and Methods of Measurements</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-9506</issn><issn pub-type="epub">2414-0473</issn><publisher><publisher-name>BNTU</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21122/2220-9506-2019-10-4-308-321</article-id><article-id custom-type="elpub" pub-id-type="custom">pimi-508</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>Средства измерений</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Measuring instruments</subject></subj-group></article-categories><title-group><article-title>Устройство и методика измерения моментов сил сопротивления качению на пятне контакта</article-title><trans-title-group xml:lang="en"><trans-title>Device and Measuring Method the Moments of Rolling Resistance Forces on the Contact Spot</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>Джилавдари</surname><given-names>И. З.</given-names></name><name name-style="western" xml:lang="en"><surname>Gilavdary</surname><given-names>I. Z.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мекид</surname><given-names>С.</given-names></name><name name-style="western" xml:lang="en"><surname>Mekid</surname><given-names>S.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"><p>Mechanical Engineering Department </p><p>Dhahran 31261, Saudi Arabia</p><p>Address for corres</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>Ризноокая</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Riznookaya</surname><given-names>N. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Адрес для переписки: Н.Н.Ризноокая – Белорусский национальный технический университет, пр. Независимости, 65, г. Минск 220013, Беларусь    e-mail: Riznookaya@bntu.by</p></bio><bio xml:lang="en"><p>Address for correspondence: N.Riznookaya – Belarusian National Technical University, Nezavisimosty Ave., 65, Minsk 220013, Belarus       e-mail: Riznookaya@bntu.by</p></bio><email xlink:type="simple">Riznookaya@bntu.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский национальный технический университет</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Belarusian National Technical University</institution><country>Belarus</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Университет нефти и полезных ископаемых имени короля Фадха</institution><country>Саудовская Аравия</country></aff><aff xml:lang="en"><institution>King Fahd University of Petroleum &amp; Minerals</institution><country>Saudi Arabia</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>12</day><month>12</month><year>2019</year></pub-date><volume>10</volume><issue>4</issue><fpage>308</fpage><lpage>321</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Джилавдари И.З., Мекид С., Ризноокая Н.Н., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Джилавдари И.З., Мекид С., Ризноокая Н.Н.</copyright-holder><copyright-holder xml:lang="en">Gilavdary I.Z., Mekid S., Riznookaya N.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://pimi.bntu.by/jour/article/view/508">https://pimi.bntu.by/jour/article/view/508</self-uri><abstract><p>В настоящее время изучение трения качения является одним из основных направлений в исследовании закономерностей контактного взаимодействия твёрдых тел. О сложности решения проблем, существующих в этой области, свидетельствует практически необозримое количество публикаций, список которых постоянно растёт.</p><p>В данной работе внимание уделяется исследованиям моментов сопротивления качению при смещениях из положения равновесия тела в форме шарика, существенно меньших размеров пятна контакта. Цель представленной работы состояла в описании конструкции разработанного авторами одноконтактного маятникового прибора, в котором физический маятник, опираясь на плоскую поверхность исследуемого тела только одним шариком, совершает свободные малые качания со стабильной вертикальной плоскостью качаний, а также в описании специальной методики измерений с высокой чувствительностью и точностью сил сопротивления качению, в том числе, сил адгезии и упругих сил частотно-независимого внутреннего трения.</p><p>Оригинальность методики измерения сопротивления качению в данной работе состоит в использовании метода нелинейной аппроксимации зависимости амплитуды и периода качаний маятника от времени. Аппроксимация проводится на основании предложенных законов затухания амплитуды и изменения периода, которые отличаются от обычного экспоненциального закона. Предполагается, что данный подход позволяет провести оценку поверхностного натяжения твёрдого тела и оценку давления сил адгезии между поверхностями контактирующих тел, а также установить аналитический вид момента сопротивления качению. Проведены эксперименты для следующих пар контактирующих тел: сталь-сталь, сталь-стекло, сталь-кремний. Построены кривые зависимости момента сопротивления качению от амплитуды качаний маятника.</p><p>Разработанный одношариковый маятниковый прибор и предложенная методика измерений открывают новые широкие возможности для исследований механизмов и закономерностей сопротивления качению в условиях микрои мезоперемещений катящегося тела из состояния покоя.</p></abstract><trans-abstract xml:lang="en"><p>Currently, the study of rolling friction is one of the main directions in the study of the laws of contact interaction of solids. The complexity of solving the problems existing in this area is evidenced by the practically vast number of publications, the list of which is constantly growing.</p><p>In this paper, attention is paid to studies of the moments of rolling resistance at displacements from the equilibrium position of a ball-shaped body that are substantially smaller than the size of the contact spot. The purpose of the present work is to describe the design of the single-contact pendulum device developed by the authors, in which the physical pendulum, resting on the flat surface of the body under study with only one ball, makes free small stable swings in a vertical plane, as well as in the description of a special measurement technique with high sensitivity and accuracy rolling resistance forces, including adhesion forces and frequency-independent forces of elastic deformations. It is assumed that the adhesion forces can exhibit both dissipative properties and elastic properties, while elastic forces are independent of the strain rate.</p><p>The originality of the method of measuring rolling resistance in this paper consists in using the method of nonlinear approximation of the dependence of the amplitude and period of swing of the pendulum on time. The approximation is carried out on the basis of the proposed laws of amplitude decay and period variation, which differ from the usual exponential law.</p><p>It is assumed that this approach allows one to evaluate the surface tension of a solid and evaluate the pressure of adhesion forces between the surfaces of the contacting bodies, as well as to establish an analytical form of the moment of rolling resistance. The curves of the dependence of the rolling resistance moment on the swing amplitude of the pendulum are constructed. Experiments were performed for the following pairs of contacting bodies: steel-steel, steel-glass, steel-electritechnical silicon. It was assumed that the pressure at the contact spot did not exceed the elastic limit.</p><p>The developed single-ball pendulum device and the proposed measurement procedure open up new wide possibilities for studying the laws of mechanisms of rolling resistance under conditions of microand mesoscale displacements of a rolling body from a state of rest.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>адгезия</kwd><kwd>поверхностное натяжение</kwd><kwd>сопротивление качению</kwd><kwd>физический маятник</kwd><kwd>сферическая опора</kwd></kwd-group><kwd-group xml:lang="en"><kwd>adhesion</kwd><kwd>surface tension</kwd><kwd>rolling resistance</kwd><kwd>physical pendulum</kwd><kwd>spherical support</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">Cross, R. Coulomb’s Law for rolling friction / R. Cross // Amer. J. Phys. – 2016. – Vol. 84, no. 3. – P. 221–230. 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