Rail rolling contact fatigue on a Chinese heavy haul line: Observations, monitoring and simulations

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2024-11-05 DOI:10.1016/j.engfailanal.2024.109040

X. Zhao , Y.H. Xing , X. Zhang , F. Peng , H.D. Xue , Y.L. Han

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引用次数: 0

Abstract

Severe rail rolling contact fatigue (RCF) occurring on curves of a heavy haul line in China was studied by field observations, monitoring tests, failure analyses and numerical simulations. Visual appearance, worn profiles, surface hardness, crack dimensions and so on were measured in field for rails and typical running wheels, meanwhile other related information was also collected. Significant influences of the radius of curvature and loaded/empty trains were figured out. RCF cracks on R600 m curves was found to get initiated in days, propagated downward very quickly in the first 2 months, and then stabilized at a depth of about 2.5 mm until rail replacement owing to further propagation into un-flowed bulk material. Though the failure analyses, crack depths measured by an eddy current detector were verified. Considering measured/collected data, a numerical approach combining a train dynamic model and the damage function model (Tγ) has been developed to predict the rail RCF occurrence, in which the influence of trapped liquids was better modelled by introducing a critical angle of the resultant creep force. Typical simulations showed that numerical predictions could well explain the observed phenomena, providing a useful tool for further studies.

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中国重载运输线上的铁轨滚动接触疲劳：观察、监测和模拟

通过现场观察、监测试验、失效分析和数值模拟，对发生在中国重载运输线路曲线上的严重钢轨滚动接触疲劳（RCF）进行了研究。现场测量了钢轨和典型运行车轮的外观、磨损轮廓、表面硬度、裂纹尺寸等，同时还收集了其他相关信息。研究还找出了曲率半径和列车满载/空载的重要影响因素。研究发现，R600 米曲线上的 RCF 裂纹在数天内开始出现，在最初的 2 个月内迅速向下扩展，然后稳定在约 2.5 毫米的深度，直到由于进一步扩展到未流动的散装材料而更换钢轨为止。虽然进行了故障分析，但涡流检测器测得的裂纹深度也得到了验证。考虑到测量/收集的数据，结合列车动态模型和损伤函数模型（Tγ）开发了一种数值方法来预测钢轨 RCF 的发生，其中通过引入蠕变力的临界角，更好地模拟了滞留液体的影响。典型模拟表明，数值预测可以很好地解释观察到的现象，为进一步研究提供了有用的工具。

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

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.