Critical analysis of PN-EN 13979-1:2020-12: application limitations in fatigue assessment of railway wheels

The paper focuses on PN-EN 13979-1:2020-12, which defines the technical requirements for steel solid monobloc wheels used in railway vehicles. The crucial role of the wheel-rail contact for the riding safety and comfort of passengers, as well as for the durability of rolling stock, was highlighted. Fatigue strength aspects of the wheels were analysed, including the amplitude and mean stresses which affect their long-term operation. Also discussed are factors that are not completely covered in the standard, such as varying operating conditions, thermal effects and material ageing, which can increase the fatigue wear process. The main purpose of the paper is to provide a comprehensive view of the importance of fatigue analysis and to identify areas that may require further research to improve the safety and operational efficiency of rolling stock.