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For a new type of rolling contact fatigue (RCF) (Belgrospi) an explanation has been found by an approach closely combining experimental and theoretical investigations. This new type of RCF has firstly been observed on high speed lines in wide curves. The speed on those locations exceeded 200km/h. Cracks occurred in nests periodically spread along the rail tread. These nests are grouped to the peaks...
A lifetime prediction tool for railway wheels and rails should be able to predict both wear and rolling contact fatigue (RCF), which are the two main deterioration phenomena. Several models exist to predict wear or RCF, but not many models exist which can predict both. In this study, two of these RCF prediction models have been extended. The performance of these models has been studied through a parametric...
A model which can predict the length of the surface crack and crack depth in rails was developed in a previous study by the authors B. Dirks, R. Enblom, A. Ekberg, M. Berg (2015) [1]. In the present study, verification of this crack prediction model in combination with a wear prediction model was done against wheel measurements. For a period of 15 months, the wheels of three units of a Stockholm commuter...
A methodology for numerical prediction of accumulated rail damage in railway turnouts is presented. Based on simulation of dynamic vehicle-track interaction followed by a discretisation of the conditions in each wheel-rail contact, distributions of rail wear are calculated by the Archard model of sliding wear, while surface initiated rolling contact fatigue (RCF) damage is evaluated by the Palmgren–Miner...
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