Among the defects of railway rails there are internal longitudinal and transverse cracks. Of practical interest are small transverse cracks, not always detectable by the flaw detector. The article assesses the ultimate load on a rail with an internal transverse crack. The rail is considered as a beam on a continuous elastic base, which is subjected to a single impact of a concentrated force. The shape of the crack is assumed to be circular. The cross-section of the beam has the shape of an irregular I-beam. The permissible load is calculated for three rail sizes. The initial and final crack sizes correspond to 5% and 30% of the rail head area of each type. The results are comparable with the available experimental data. In this case, for the experimental conditions, the rail was considered as a beam on a solid elastic base, and for the laboratory conditions - as a two-supported beam. It is shown that the crack size does not have a strong influence on the static strength of the rail under a single force impact. As a result of this work, a simple but effective method of determining the coefficient of stress intensity has been developed, which favourably differs from other known methods in that the result has a finite formula, is easily applicable in calculations and gives an acceptable error for assessing the crack resistance of a rail under operational conditions.
About the Strength of a Rail with an Internal Transverse Crack
Lect. Notes in Networks, Syst.
International Scientific Siberian Transport Forum ; 2021 May 11, 2021 - May 14, 2021
International Scientific Siberian Transport Forum TransSiberia - 2021 ; Kapitel : 41 ; 371-379
2022-03-19
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
About the Strength of a Rail with an Internal Transverse Crack
TIBKAT | 2022
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