MECHANICS
Mechanics of Deformable Solids
DOI.org/10.5281/zenodo.1119153
Loktev A., Grishin A., Talskikh K., Nwachukwu O.
ALEKSEY LOKTEV, Doctor of Physical and Mathematical Sciences, Professor, Head, Department of Transport Construction, e-mail: prtlokt@yandex.ru
Moscow State University of Railway Engineering
9 Obraztsova St., building 9, Moscow, Russia, 127994
ANTON GRISHIN, Engineer, e-mail: antoxa.o_o@mail.ru
KRISTINA TALSKIKH, Engineer, e-mail: catswild@mail.ru
OKECHUKWU NWACHUKWU, Postgraduate, e-mail: npas@ro.ru
Department of Welding Engineering, School of Engineering
Far Eastern Federal University
8 Sukhanova St., Vladivostok, Russia, 690091
The impact of high-frequency cyclic loading on the mechanical properties of steel
Abstract: The advanced development of high speed rail system imposes increased safety requirements to the rolling stock and upper track components. Researchers and designers actively work to create more complete and adequate models of the structures and their elements as well as to develop new materials to produce them. Pressing is the task to consider traditional materials as well in various operating conditions including the one when the frequencies of the dynamic force of the rolling stock increase and the effects of various workloads and vibrations reach high-frequency range. The article deals with modelling an impact that a high-frequency loading has on a sample made of rail steel. The impact like that occurs when the rolling stock moves through an artificial environment. It is assumed that the operation of the rail within a sleeper step is governed by the uniaxial stress-strain laws. The article presents the experimental results and findings obtained from the ultrasonic high-frequency cyclic tests and the structural analysis of the model material, the latter being the low-carbon perlite steel.
Key words: high-frequency fatigue testing, gigacycle fatigue, microstructure, microhardness.
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