J. F. Santa, J. J. Toro-Castrillón, M. Pérez Giraldo, J. Jaramillo, G. Hernández, A. Toro
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The failure analysis of a fractured wheel from a train travelling in a heavy-haul line was carried out. The microstructure of the wheel was studied by Light Optical Microscopy (LOM) and the chemical composition was analyzed by Optical Emission Spectrometry (OES). Tensile tests were performed in samples extracted from the fractured wheel to evaluate mechanical properties. The results from the material’s characterization combined with the fractographic examination and the stress analysis by finite-element modeling (FEM) allowed to conclude that the wheel failed due to fatigue originated in a heavily deformed surface layer produced by rolling contact fatigue (RCF), which was not timely removed in maintenance interventions. The main crack propagated from the surface to the rim and caused a failure known as Vertical Split Rim (VSR).
期刊介绍：
Strength, Fracture and Complexity: An International Journal is devoted to solve the strength and fracture unifiedly in non linear and systematised manner as complexity system. An attempt is welcome to challenge to get the clue to a new paradigm or to studies by fusing nano, meso microstructural, continuum and large scaling approach. The concept, theoretical and/or experimental, respectively are/is welcome. On the other hand the presentation of the knowledge-based data for the aims is welcome, being useful for the knowledge-based accumulation. Also, deformation and fracture in geophysics and geotechnology may be another one of interesting subjects, for instance, in relation to earthquake science and engineering.
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