Rolling contact fatigue failure is one of the main damages in railway wheels caused by cyclic rolling with rails. This internal defects such as nonmetallic inclusions or voids and may occur heavy haul freight car wheels. The subsurface crack propagation behaviors are evaluated twin-disc-type tests using test specimens artificial defects. Finite element analyses involving simulated also conducte...

This work performs a detailed analysis of the cracks obtained in fretting fatigue tests with cylindrical contact presence small oscillatory rolling pad. To do so, have been carried out. Preliminary observations indicate that area is larger than theoretical one according to Hertz’s theory. could mean that, due geometry and stiffness test setup, pad occurring during tests. reproduce this phenomen...