Crack propagation retardation behavior of shattered rim in the railway wheel

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL Theoretical and Applied Fracture Mechanics Pub Date : 2024-11-09 DOI:10.1016/j.tafmec.2024.104754

Xiaolong Liu , Kelian Luo , Pengcheng Gao , Fenbo Zhang , Wenjing Wang

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Abstract

Shattered rim, known as “wheel cancer”, is a century-old problem that restricts the reliability of railway wheels. Crack propagation retardation of shattered rim in the railway wheel was investigated in this paper. First, a full-scale wheel-rail bench test rig was used to conduct wheel-rail tests on a wheelset with an interior rim crack taken from service. The interior rim crack did not propagate over the entire 50000 km distance. Cracks initiated from the two through-rim defects and propagated at a slow speed. Then, equivalent tests were conducted to investigate crack propagation behavior of the shattered rim. The crack growth rate increased with the increase of crack length for the specimen under tension–torsion loading, while that decreased with the increase of crack length for the specimens under pure-torsion and compression-tension loading. The crack propagation retardation is attributed to the compression and friction of the crack surfaces. Finally, a model was developed to describe crack propagation retardation in shattered rims. The effective stress intensity factor predicted by the model initially increases and then gradually decreases. The shattered rim has a critical size at different depths from the tread under constant amplitude load. The predicted critical size decreases with the increase of the depth.

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铁路车轮破碎轮辋的裂纹扩展延迟行为

轮辋破碎被称为 "车轮癌症"，是制约铁路车轮可靠性的百年难题。本文对铁路车轮破碎轮缘的裂纹扩展延缓进行了研究。首先，使用全尺寸轮轨台架试验台，对从现役车轮上取下的内轮缘裂纹车轮组进行轮轨试验。轮辋内侧裂纹没有在整个 50000 公里的距离上扩展。裂纹从两个贯穿轮辋的缺陷开始，以缓慢的速度扩展。然后，进行了等效试验，以研究破碎轮辋的裂纹扩展行为。在拉伸-扭转加载条件下，试样的裂纹增长速率随裂纹长度的增加而增加，而在纯扭转和压缩-拉伸加载条件下，试样的裂纹增长速率随裂纹长度的增加而减少。裂纹扩展延缓的原因在于裂纹表面的压缩和摩擦。最后，建立了一个模型来描述破碎边缘的裂纹扩展延迟。该模型预测的有效应力强度因子最初会增大，然后逐渐减小。在恒定振幅载荷下，破碎轮辋在距胎面不同深度处具有临界尺寸。预测的临界尺寸随着深度的增加而减小。

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

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.