Failure analysis of a heavy-haul train wheel

IF 0.4 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Strength Fracture and Complexity Pub Date : 2022-09-13 DOI:10.3233/sfc-220285

J. F. Santa, J. J. Toro-Castrillón, M. Pérez Giraldo, J. Jaramillo, G. Hernández, A. Toro

引用次数: 0

Abstract

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).

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重载列车车轮失效分析

对重载线路列车车轮断裂的故障进行了分析。利用光学显微镜(LOM)研究了车轮的微观结构，并用发射光谱法(OES)分析了车轮的化学成分。从断裂车轮中提取的样品进行了拉伸试验，以评估机械性能。材料特性、断口检验和有限元建模(FEM)应力分析的结果表明，车轮失效是由于滚动接触疲劳(RCF)产生的严重变形表面层引起的疲劳，而在维护干预中没有及时消除。主裂纹从表面扩展到边缘，并导致被称为垂直裂缘(VSR)的失败。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Strength Fracture and Complexity MATERIALS SCIENCE, CHARACTERIZATION & TESTING-

CiteScore

1.30

自引率

0.00%

发文量

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.