Numerical modelling of a 3D rail RCF 'squat'-type crack under operating load

摘要: The analysis is based on the 3D FE model of rail Rolling-Contact-Fatigue (RCF) 'squat'-type crack, which tends to be common in tracks with high-speed passengers and mixed traffic. incorporates section a wheel real geometry, rolling over running band containing crack. state stress vicinity crack front determined, consequently values ranges intensity factors (SIFs) K 1 , II III at are calculated for cycle rolling. To simulate loading conditions occurring practice, residual, bending thermal stresses acting presence tractive force were taken into account. results indicate significant role face friction mechanism the'squat'. longitudinal lateral residual may also influence cycles, especially cases reduced between faces. Reduction coefficient close zero creates propagation driven by shear mode mechanism. These obtained under project sponsored ERRI D173 Committee, Utrecht, Netherlands.