Siberian State Industrial University, Novokuznetsk, Russia

A. A. Umansky, Dr. Eng., Associate Prof., Director of the Institute of Metallurgy and Materials Science, e-mail: umanskii@bk.ru

EVRAZ United West Siberian Metallurgical Plant, Novokuznetsk, Russia
R. N. Molokanov, Director of the Rails Segment, e-mail: Roman.Molokanov@evraz.com
V. V. Dorofeev, Dr, Eng., Chief Roll Designer of the Rail and Beam shop, e-mail: vladimir.dorofeev@evraz.com

A new rail profile R71 has been developed, which provides an increase in the service life of railway rails by creating the necessary metal reserve during the grinding of rails laid in the path with an increase in the height of the profile head. For rails of a new type, the optimal range of the head height and the total height of the rail is justified, which allows minimizing deformations during the movement of railway trains on rails and ensuring the stability of the railway track under the influence of longitudinal temperature compressive stresses. In order to substantiate the effectiveness of the use of the developed rails of the R71 type, modeling of the stress-strain state in the track elements for cases of laying rails R71 and standard rails R65 was carried out. Based on the results of mathematical modeling carried out using the finite element method in the ANSYS software package, it was determined that the use of rails of a new type can significantly reduce stresses in such elements of the rail track as the sole of the rail, sleepers, ballast layer and on the main platform of the roadbed. At the same time, for the case of laying R71 rails in place of R65 rails, together with an increase in the rigidity of the under-rail gaskets from 100 to 300 MN/m, there is a decrease in the stress level in the area of the rail sole by 19 % with a slight increase in the stresses in the under-rail zone. The results obtained indicate the effectiveness of the transition to the use of rails of type R71 instead of rails R65, since when they are used, a more favorable scheme of the stress-strain state of rails is formed during operation, the probability of formation and development of defects leading to premature or emergency failure of rails is reduced.

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