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The development of a crack propagation model for railway wheels and rails

Babette Dirks ; Roger Enblom ; Anders Ekberg (Institutionen för tillämpad mekanik, Dynamik) ; Mats Berg
Fatigue & Fracture of Engineering Materials & Structures (8756-758X). Vol. 38 (2015), 12, p. 1478-1491.
[Artikel, refereegranskad vetenskaplig]

Rolling contact fatigue (RCF) and wear of railway wheels and rails are the main phenom-ena that affect their m aintenance costs. When crack propagation and wear rates can bepredicted, maintenance planning can be optimised, and cost-effective measures can bedeveloped. Several RCF models exist, but none which can be used in combination withvehicle dynamics simulations and can predict the actual crack depth. This study showsthe development of a crack propagation model that can be applied for both railwaywheels and rails. Two unknow n material parameters in the model were calibrated againstcrack measurements in a curve on the Dutch railways over a period of 5 years. Two dif-ferent RCF models were used to calculate the stress magnitudes for the propagationmodel. The propagation model can be used in combination with vehicle-track dynamicssimulations and shows promise in predicting the actual crack depth and/or surface length.Further research is needed to determine the model’s validity for other operationalconditions.

Nyckelord: crack propagation; rolling contact fatigue; simulation; wheel–rail contact.

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Denna post skapades 2015-11-05. Senast ändrad 2016-01-04.
CPL Pubid: 225317