On the fatigue performance and residual life of intercity railway axles with inside axle boxes

Wu S. C.; Liu Y. X.; Li C. H.; Kang G. Z.; Liang S. L.

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On the fatigue performance and residual life of intercity railway axles with inside axle boxes

机译：论轴箱内轴箱疲劳性能和剩余寿命

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Railway axles with inside axle boxes have a great potential in modern urban railway system due to good dynamic performance on small-radius track. However, because of entirely different loading nature from widely-used one, a challenging problem of the fatigue performance and damage endurance arises in the case of defects from various external sources. In this paper, a stepwise fatigue assessment framework composed of safe life as the first level and damage tolerance as the second level was tentatively proposed for the wheelset with inside axle boxes. An assumed load spectrum was employed to estimate the remaining life for a damaged axle made of the EA4T steel. Calculated results show that the critical safety region has been transferred to the axle center in contrast to classical axles, where a 1.0 mm-depth crack as the inspection limit has less probability to propagate. Besides, the wheelset with inside axle boxes shows the smaller stress value. The analysis from well-known Kitagawa-Takahashi diagram indicates a security risk while only using nominal stress approach.

机译：由于小半径轨道上的良好动态性能，具有内部轴箱内部轴箱内轴箱的火车车轴具有巨大的潜力。然而，由于从广泛使用的完全加载性质的加载性，因此在各种外部来源的缺陷的情况下出现了疲劳性能和损伤耐久性的挑战性问题。本文暂时提出了一种作为第一级和第二级的第一级和损坏容差构成的逐步疲劳评估框架，提出了具有内部轴箱的轮廓。采用假设的负载谱来估计由EA4T钢制成的损坏轴的剩余寿命。计算结果表明，与经典轴相比，临界安全区域已被转移到轴中心，其中1.0毫米深度裂缝随着检查限制的概率较小。此外，带内轴箱的轮子显示出较小的应力值。众所周知的KITAGAWA-TAKAHASHI图分析表示安全风险，同时仅使用名义应力方法。

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来源
《Engineering Fracture Mechanics》 |2018年第2018期|共16页
作者
Wu S. C.; Liu Y. X.; Li C. H.; Kang G. Z.; Liang S. L.;
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作者单位

Southwest Jiaotong Univ State Key Lab Tract Power 111 Sect 1 North Second Ring Rd Chengdu 610031 Sichuan Peoples R China;

Southwest Jiaotong Univ State Key Lab Tract Power 111 Sect 1 North Second Ring Rd Chengdu 610031 Sichuan Peoples R China;

Southwest Jiaotong Univ State Key Lab Tract Power 111 Sect 1 North Second Ring Rd Chengdu 610031 Sichuan Peoples R China;

Southwest Jiaotong Univ State Key Lab Tract Power 111 Sect 1 North Second Ring Rd Chengdu 610031 Sichuan Peoples R China;

Southwest Jiaotong Univ State Key Lab Tract Power 111 Sect 1 North Second Ring Rd Chengdu 610031 Sichuan Peoples R China;

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正文语种 eng
中图分类工程力学;
关键词
Fatigue crack growth rate; Damage tolerance method; Inspection interval; Fatigue damage accumulation; Modified Kitagawa-Takahashi diagram;

机译：疲劳裂纹增长率;损伤耐受方法;检查间隔;疲劳损伤积累;改进的基塔川 - 高桥图;

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专利

1. On the fatigue performance and residual life of intercity railway axles with inside axle boxes [J] . Wu S. C., Liu Y. X., Li C. H., Engineering Fracture Mechanics . 2018,第期

机译：论轴箱内轴箱疲劳性能和剩余寿命
2. Influence of Extension of Load Spectrum on Estimation of Residual Fatigue Lifetime of Railway Axle [J] . Pavel Pokorny, Pavel Huta?, Lubo? Náhlík Diffusion and Defect Data. Solid State Data, Part B. Solid State Phenomena . 2016,第Null期

机译：载荷谱扩展对铁路车轴残余疲劳寿命估算的影响
3. Residual fatigue lifetime estimation of railway axles for various loading spectra [J] . Pokorny Pavel, Hutar Pavel, Nahlik Lubos Theoretical and Applied Fracture Mechanics . 2016,第Null期

机译：各种载荷谱下铁路车轴的残余疲劳寿命估算
4. Effect of residual stresses on the fatigue lifetime of railway axle [C] . Pavel Hutar, Pavel Pokorny, Jan Poduska, ESIS TC24 Workshop - Integrity of Railway Structures . 2017

机译：残余应力对铁路轴疲劳寿命的影响
5. The effect of different axle configurations on the fatigue life of an asphalt concrete mixture. [D] . El Mohtar, Chadi Said. 2003

机译：不同轴配置对沥青混凝土混合物疲劳寿命的影响。
6. Railway Axle Condition Monitoring Technique Based on Wavelet Packet Transform Features and Support Vector Machines [O] . María Jesús Gómez, Cristina Castejón, Eduardo Corral, 2020

机译：基于小波包变换特征和支持向量机的铁路车轴状态监测技术
7. Fatigue strength and residual life assessment of high-speed railway vehicle used S38C hollow axles [O] . YaNan HU, GuoZheng KANG, WenJing WANG, 2019

机译：高速铁路车辆使用S38C空心轴的疲劳强度和剩余寿命评估

On the fatigue performance and residual life of intercity railway axles with inside axle boxes

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