چكيده به لاتين
Regarding the growing expansion of the rail industry, the issue of travel comfort and safety has gained considerable attention throughout the last decades. Damage in the rail, such as squad, is one of the crucial defects which may lead to rail cutoff and consequently cause the train to run off the rail, if it is not taken care of. The first step towards studying this phenomenon is to analyze the contact between the wheel and the rail including the squad under the demanded working conditions. In this work, firstly, the contact between a S1002 wheelset and UIC60 rails, which is used in Iran, was simulated using Abaqus. The properties and working condition was input according to Iranian Rail Travel System. Secondly, a parametric analysis on the basis of stresses and strains of the rail was carried out on the rail damage by modeling via Abaqus. It is worthwhile to mention that the analysis was conducted within the time domain. The damage type and wheel speed were taken under investigation during the passage of the train on the rail. After the simulation, the von Mises stress distribution, within the time domain, applied on the rail by the passage of the wheel on the squad was determined and 3D stress curves on the squad were achieved through MATLAB in order to make the change in the stress on the wheel clearer. Finally, a comparison between our and previous results was made and a reasonable correlation between them, which validated our simulation, was observed. Moreover, the susceptible regions to crack initiation and propagation were predicted according to stress concentration points so as to prevent damage initiation and progress.
