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- W1497383977 abstract "To properly simulate the propagation of an existing crack, we need to model how fastand in what direction it grows. A Generalized Crack Driving Force (GCDF), based on theconcept of material forces cf. [1], is used to formulate a framework for crack propagationmodels. This framework can be used to formulate different crack propagation strategies:Explicit Proportional Extension (EPE), Implicit Proportional Extension (IPE) and MaximumParallel Release Rate (MPRR), cf. [2]. Here, it is shown that all three strategies producequantitatively good results compared with experiments, for the case of a three point bendingtest with an eccentric edge crack and internal holes [3].In railway applications, highly complex loading cases arise in the wheel–rail interface, dueto a moving contact load. For this particular loading case it is observed that the perpendicularcomponent of the GCDF is highly dependent on the chosen parameters of the numericalalgorithm. Hence, it is concluded that only the MPRR method remains applicable as it is onlydependent on the parallel component of the GCDF and therefore more robust. Furthermore,the high loads in the wheel-rail interface result in large plastic deformation whereby thefracture resistance of the material becomes anisotropic [4].Based on the MPRR method, the propagation of a single head check crack in a piece ofrail, under realistic Rolling Contact Fatigue (RCF) loading conditions, is simulated by theuse of a 2D FE model incorporating elastoplastic material behaviour. Finally, results fromthe simulations are presented and qualitatively compared to field observations." @default.
- W1497383977 created "2016-06-24" @default.
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- W1497383977 date "2011-01-01" @default.
- W1497383977 modified "2023-09-27" @default.
- W1497383977 title "Crack propagation in rails based on the concept of material forces" @default.
- W1497383977 hasPublicationYear "2011" @default.
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