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Study on acoustic emission properties and crack growth rate identification of rail steels under different fatigue loading conditions
International Journal of Fatigue ( IF 6 ) Pub Date : 2023-03-15 , DOI: 10.1016/j.ijfatigue.2023.107638
Jingmang Xu, Kai Wang, Qiantao Ma, Haoran Li, Ping Wang, Rong Chen, Yao Qian, Dongfang Zeng

The acoustic emission (AE) technique is a non-destructive real-time dynamic monitoring technique for structural health. Nonetheless, there has been a lack of research on the initiation and propagation mechanisms of fatigue cracks in rails. In this paper, the AE signal properties of fatigue crack initiation and growth are studied in three types of rail materials under different fatigue loading conditions, and a method is proposed to identify the fatigue crack growth rate. The results show that this method has good applicability for different rail materials, and the crack growth rate can be quantitatively identified based on the AE energy growth rate.



中文翻译:

不同疲劳载荷条件下钢轨钢声发射特性及裂纹扩展率识别研究

声发射(AE)技术是一种无损的结构健康实时动态监测技术。尽管如此,目前对钢轨疲劳裂纹的萌生和扩展机制的研究还很缺乏。本文研究了三种钢轨材料在不同疲劳载荷条件下疲劳裂纹萌生和扩展的AE信号特性,并提出了一种识别疲劳裂纹扩展速率的方法。结果表明,该方法对不同钢轨材料具有良好的适用性,可以根据AE能量增长率定量识别裂纹扩展率。

更新日期:2023-03-18
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