Fracture behavior analysis and fatigue assessment of the spring clip in heavy-haul railway

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-07-30 DOI:10.1111/ffe.14401

Yu-Xuan Wang, Wen-Jun Xiao, Zhi-Feng Wang, Yong Liu, Er-Bo Wang, Hong-Tao Chang

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引用次数: 0

Abstract

This paper proposes a novel method based on a numerical simulation approach and fatigue fracture theory to analyze the fracture behavior and assess the fatigue life of spring clips. To this end, the finite element (FE) model of the vehicle-track-foundation system was developed including the key parts of the type II fastening system. Meanwhile, the spring clip FE model was validated through the natural vibration characteristics. Subsequently, the numerical simulations were performed under various working conditions to obtain the fatigue characteristics of the spring clips. The fatigue crack initiation life and damage were analyzed using FE results for the spring clips with ε-N curve and Brown-Miller criterion. Moreover, based on the initial crack geometry of the spring clips, the maximum circumferential stress criterion with the Paris equation was employed to analyze the crack extension behavior and assess the fatigue crack extension life.

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重载铁路弹簧夹的断裂行为分析和疲劳评估

本文提出了一种基于数值模拟方法和疲劳断裂理论的新方法，用于分析弹簧夹的断裂行为并评估其疲劳寿命。为此，本文建立了车辆-轨道-地基系统的有限元（FE）模型，包括 II 型紧固系统的关键部件。同时，通过自然振动特性对弹簧夹 FE 模型进行了验证。随后，在各种工况下进行了数值模拟，以获得弹簧夹的疲劳特性。利用ε-N 曲线和 Brown-Miller 准则对弹簧夹的疲劳裂纹起始寿命和损伤进行了分析。此外，根据弹簧夹的初始裂纹几何形状，采用最大圆周应力准则和帕里斯方程分析了裂纹扩展行为，并评估了疲劳裂纹扩展寿命。

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.