Discussion on Ultrasonic Inspection Intervals Based on Fatigue Crack Growth Life Analysis of Axle for CRH2A EMU

Menghong YE

doi:10.13890/j.issn.1000-128x.2020.05.022

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Discussion on Ultrasonic Inspection Intervals Based on Fatigue Crack Growth Life Analysis of Axle for CRH2A EMU

Research & Development | 更新时间：2021-12-10

- Discussion on Ultrasonic Inspection Intervals Based on Fatigue Crack Growth Life Analysis of Axle for CRH2A EMU
- Electric Drive for Locomotives Issue 5, Pages: 101-105(2020)
- 作者机构：
  
  1.中国国家铁路集团有限公司　成都安全监督管理特派员办事处，四川　成都　610082
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128x.2020.05.022
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Menghong YE. Discussion on Ultrasonic Inspection Intervals Based on Fatigue Crack Growth Life Analysis of Axle for CRH2A EMU. [J]. Electric Drive for Locomotives (5):101-105(2020)
DOI：

Menghong YE. Discussion on Ultrasonic Inspection Intervals Based on Fatigue Crack Growth Life Analysis of Axle for CRH2A EMU. [J]. Electric Drive for Locomotives (5):101-105(2020) DOI： 10.13890/j.issn.1000-128x.2020.05.022.

摘要

介绍了不同类型车辆车轴超声波探伤周期和CRH2A型动车组车轴概况。通过综合考虑初始裂纹、临界裂纹、应力比、断裂韧性和有效应力强度因子等因素得出疲劳裂纹扩展寿命计算公式，通过以车轴最薄弱部位存在表面半椭圆形裂纹并承受最大应力幅值计算CRH2A型动车组车轴疲劳裂纹扩展寿命，与车轴超声波探伤周期进行比较分析，认为优化现行探伤周期具有可行性。

Abstract

The ultrasonic inspection interval of different types of vehicle axles and the overview of CRH2A EMU axles was introduced. By comprehensively considering the initial crack, critical crack, stress ratio, fracture toughness and effective stress intensity factor and other factors, the formula for calculating the fatigue crack propagation life was obtained. Furthermore, based on the unilateral semi-elliptical surface crack existing at the weakest part of the axle and the maximum stress amplitude, the fatigue crack growth life of CRH2A EMU axles was calculated, with comparison and analysis of the ultrasonic flaw detection cycle of the axles, it was proved feasible to optimize the current ultrasonic flaw detection interval.

关键词

CRH2A型动车组车轴疲劳裂纹扩展寿命分析超声波探伤周期

Keywords

CRH2AEMUaxlethe fatigue crack growthlife analysisthe ultrasonic inspection interval

references

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刘宇轩, 吴圣川, 李存海, 等. 轴箱内置型铁路车轴疲劳性能与寿命评估[J]. 交通运输工程学报, 2019, 19(3): 100-108.

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