Effect of Railcar Wheel Tire Profiles on the Contact Stress Level in Subway Rails

摘要: The statistical analysis performed on the defectiveness of rails in Kiev subway railway shows that main cause occurrence most defects is contact fatigue rail material. paper presents modern concepts crack growth railhead. It has been found one promising directions studying stress-strain state and process a numerical simulation, which results interaction between rolling stock wheels are presented. During problem was solved an elastic formulation. We considered R50, R65, UIC60 profiles, standard wheels, whose tire profile developed by Minetek closed joint-stock company. conditions for rail–wheel corresponded to train movement straight section track without slipping. effect wheel stress level different types assessed. Comparison maximum equivalent levels combination best (in terms reducing level) sections R50 with gradient 1 20 10 taper wheel, corresponds GOST 9036-88. When company used, zone over 1000 MPa all types. higher than yield strength steel, will accelerate wear give rise low-cycle cracks subsequent formation defects.