Modeling and failure analysis of a broken railway axle: Effects of surface defects and inclusions

被引：8

作者：

Alihosseini H. ^{[1
]}

Dehghani K. ^{[1
]}

机构：

[1] Metallurgical Engineering Department, Amirkabir University of Technology

来源：

Journal of Failure Analysis and Prevention | 2010年 / 10卷 / 3期

关键词：

Critical crack length; Fatigue life; Finite element; Railway axle;

D O I：

10.1007/s11668-010-9340-0

中图分类号：

学科分类号：

摘要：

In the present work, the fatigue behavior of an axle was analyzed using modeling and experimental approaches. A failed axle was used for experimental studies. The experimental results were then analyzed in order to model and predict the fatigue life of axle. The three-dimensional finite element analysis was used to simulate the fatigue behavior of axle. The growth of a machining defect, 2 μm initial crack length, was simulated versus applied cycles. The changes in the stress intensity factor as a function of crack length were modeled as well. The model predicted that after about 5 × 10 8 cycles there was an abrupt increase in the crack length, reaching a critical value of about 65 mm at around N f = 5 × 10 9 cycles, indicating that the longer the crack, the higher its growth will be. The experimental results were then compared with the modeling predictions. It is shown that the latter are in a good agreement with the former. The results obtained in this study do give a basis for evaluation of single scratch or notch produced by improper machining. © ASM International 2010.

引用

页码：233 / 239

页数：6

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