Evaluation of the stressed-strained state of crossings of the 1/11 type turnouts by the finite element method
DOI:
https://doi.org/10.15587/1729-4061.2017.107024Keywords:
crossing, turnout, finite element method, contact stresses, rolling stock of railroadsAbstract
We carried out evaluation of the stressed-strained state of crossings of turnouts by the finite element method in the Ansys programming complex. It was established that under conditions of three-axial compression, at large stresses of vertical compression, the cracks of multi-cycle metal fatigue of the crossing develop.
It was found that the development of defects by the code DS 14.1-14.2 on the rolling surface of the cast part of a wing rail and the crossing’s core occurs due to high contact stresses near the edge of the working face of a wing rail and the crossing’s core. They occur in this region in the form of cyclically repeated and sign-alternating normal and tangential stresses from cyclically recurring power impacts from the wheels of rolling stock of railroad transport.
It was established that for the normal stresses, values that are maximal by absolute magnitude correspond to the moment when a wheel passes the estiamted cross section of the crossing. For the tangential stresses, on the contrary, at the moment when the wheel is over the estimated cross section, their magnitude is close to zero.
The obtained results of the stressed-strained state of crossings are necessary for the optimal design of transverse and longitudinal profiles of the crossing. This will make it possible to extend operation life cycle of the crossings of turnouts and save state budget resources for their current maintenance and repair.
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Copyright (c) 2017 Vitalii Kovalchuk, Yaroslav Bolzhelarskyi, Bogdan Parneta, Andriy Pentsak, Oleksiy Petrenko, Ihor Mudryy
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