Beanspruchungsanalyse und metaliographische Untersuchungen als Beitrag zum Verstaendnis von Vorgaengen im Rad/Schiene-Kontakt

摘要

Due the modern high performance traffic wheel and rail are subjected to very high stresses. The high loads in the wheel/rail contact area lead to wear and rolling contact fatigue damages, which constitute an important cost factor for railway companies. In simulations of dynamical vehicle behaviour and contact stresses, the shape of the contact patches as well as the vectors of creep and stress in the patch are computed. These have been related to the deformations of the rail head, visualized by methods of metallographic studies. Both methods lead to compatible results. The study leads to the request to improve steel quality and contact geometry such that an equilibrium between wear and rolling contact fatigue is established on a low level.