Investigation of fractures mechanisms of railway axles

Željko Stojanović; Božidar Matijević; Sanja Stanisavljev; Spasoje Erić

doi:10.5937/zasmat2101051S

Authors

Željko Stojanović Šinvoz d.o.o., Zrenjanin Author
Božidar Matijević Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, Zagreb, Hrvatska Author
Sanja Stanisavljev University of Novi Sad, Technical Faculty, Zrenjanin, Serbia Author
Spasoje Erić Visoka tehnička škola strukovnih studija, Zrenjanin Author

DOI:

https://doi.org/10.5937/zasmat2101051S

Keywords:

axle, railway vehicle, material fatigue, railway incidents, corrosion

Abstract

The paper gives a systematic overview of literature sources who consider impacts critical damage of mechanical, corrosive and thermal nature which may occur on railway axles during operation and which may be the causes of their fracture. The results of the research of the mechanisms that cause cracks, crack propagation and final fracture of the railway vehicle axle, such as material fatigue and the appearance of localized notches caused by paint (coating) separation, damage from ballast impact and pitting corrosion are presented. The influence of high temperatures and overheating on the axles was analyzed and an excerpt from the research published in one research report was given. Some significant suggestions for optimizing the design of the axles are highlighted which would take into account the analysis of time-varying axle stresses, stress spectrum in operation, axle tolerance to damage and the existence of residual surface stresses. The reliefs of the fracture surfaces of the axle after the railway incidents and the derailment of the rail vehicle from the rails are presented and explained.

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