vestnikvniizhtВестник Научно-исследовательского института железнодорожного транспорта (ВЕСТНИК ВНИИЖТ)RUSSIAN RAILWAY SCIENCE JOURNAL2223-97312713-2560Joint Stock Company "Railway Research Institute"10.21780/2223-9731-2019-78-3-141-148vestnikvniizht-310Research ArticleДругоеMiscellaneousКритерии для прогнозирования возникновения контактно-усталостных повреждений в колесах железнодорожного подвижного состава и рельсахCriteria for predicting the initiation of rolling contact fatigue damage in the railway wheels and railsСакалоВ. И.SakaloV. I.

Сакало Владимир Иванович, д-р техн. наук, профессор, профессор кафедры «Механика и динамика и прочность машин», Брянск, 241035, Россия

Vladimir I. Sakalo, Dr. Sci. (Eng.), Professor, Professor of Department “Mechanics and Dynamics and Strength of Machines”

СакалоА. В.SakaloA. V.

Сакало Алексей Владимирович, канд. техн. наук, доцент кафедры «Механика и динамика и прочность машин», Брянск, 241035, Россия

Alexey V. Sakalo, Cand. Sci. (Eng.), Associate Professor of Department “Mechanics and Dynamics and Strength of Machines”

sakalo@umlab.ruФедеральное государственное бюджетное образовательное учреждение высшего образования «Брянский государственный технический университет» (ФГБОУ ВО БГТУ)РоссияFederal State Budgetary Establishment of Higher Education “Bryansk State Technical University” (FGBOU VO BSTU)Russian Federation201925072019783141148Copyright © Сакало В.И., Сакало А.В., 20192019Сакало В.И., Сакало А.В.Sakalo V.I., Sakalo A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.journal-vniizht.ru/jour/article/view/310

В статье детально рассмотрены подходы, в которых используется критерий контактной усталости (критерий Данг Вана) и диаграмма приспособляемости материалов к действию переменных напряжений (диаграмма Джонсона), нашедшие широкое применение для оценки контактной усталости колес железнодорожного подвижного состава и рельсов. Они опубликованы в основном на английском языке. В статье дано их русскоязычное описание. Рассмотрен также критерий, базирующийся на амплитудном значении максимального касательного напряжения.

The development of the methods for modeling the processes of accumulation of the rolling contact fatigue damage and wear of the wheels of the railway rolling stock and the rails is particularly relevant due to the increase in the number of damage in the recent times. The work is underway to improve the chemical composition and the technology of production of the wheel and rail steels in order to improve their mechanical properties and ability to resist the action of the cyclic loads. The methods of modeling allow predict the possibility of initiation of the fatigue cracks during operation with the sufficient accuracy in the short time. The selection of the contact fatigue criterion and the mathematical apparatus for calculating the stresses at points in the area adjacent to the contact patch to obtain the numerical values of the criterion components is the most important task in the development of modeling methods. The article focuses on the approaches based on the Dang Van criterion and the shakedown diagram for a material undergoing to the action of cyclic loads, which are widely used to assess the rolling contact fatigue of the wheels and rails. The assumptions that are used in the development of the algorithms concerning the models of the contacting bodies, the shape of the contact patch, the distribution of the contact pressures and the tangential forces are considered. The approach using the criterion — the amplitude value of the maximal shear stress is also considered. The example of modeling the process of accumulation of the rolling contact fatigue damage in the wheel of the freight car is given. The results of modeling are presented in the form of the isolines of the criterion values and the accumulated damage in the area adjacent to the contact patch. This work was supported by the Russian Foundation for Basic Research under Grant [17-01-00815A].

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The authors declare that there are no conflicts of interest present.