Fatigue life analysis of subway e-clips under multiwavelength rail corrugation excitation

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-06-15 DOI:10.1111/ffe.14364

Bingjie Dong, Guangxiong Chen, Qifeng Song, Xiaohang Feng, Wenjuan Ren, Guiming Mei

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引用次数: 0

Abstract

Fatigue-induced clip fractures are the most common type of damage in railway systems, and they are exacerbated by rail corrugation. This research investigated the development of rail corrugation through long-term measurements and examined the impact of rail corrugation on the fatigue life of e-clips using a finite element model. The examination included different corrugation wavelengths, namely, short-pitch corrugation (SPC), long-pitch corrugation (LPC), and a new form of corrugation called superposed SPC and LPC. The results showed that increasing corrugation amplitude reduces an e-clip's fatigue life and alters the region in the clip where fatigue damage occurs. A short corrugation wavelength shortens fatigue life. On railway tracks with superposed SPC and LPC, a significant increase in LPC amplitude sharply reduces a clip's fatigue life, even under minuscule SPC amplitude. Effective measures are proposed to prolong the fatigue life of e-clips subjected to the effects of rail corrugation.

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多波长轨道波纹激励下的地铁电子夹疲劳寿命分析

疲劳引起的夹片断裂是铁路系统中最常见的损坏类型，而轨道波纹会加剧这种损坏。这项研究通过长期测量调查了轨道波纹的发展情况，并使用有限元模型研究了轨道波纹对电子夹疲劳寿命的影响。研究包括不同波长的波纹，即短间距波纹（SPC）、长间距波纹（LPC）以及一种称为 SPC 和 LPC 叠加的新波纹形式。研究结果表明，增加波纹幅度会降低电子夹的疲劳寿命，并改变夹子中发生疲劳损坏的区域。波纹波长越短，疲劳寿命越短。在 SPC 和 LPC 叠加的铁轨上，即使 SPC 振幅很小，LPC 振幅的显著增加也会大幅降低夹片的疲劳寿命。本文提出了延长受轨道波纹影响的电子夹具疲劳寿命的有效措施。

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

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.