Estimation of the Transverse Crack Propagation of a Heat Treated Rail
Estimation of the Transverse Crack Propagation of a Heat Treated Rail
复制标题
热处理钢轨横向裂纹扩展的估计
DOI：
10.2219/rtriqr.60.4_274
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Ryuichi Yamamoto
中科院分区：
文献类型：
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作者：
M. Hosoda;J. Mizutani;Ryuichi Yamamoto
热处理钢轨中经常发生由轨距角裂纹引起的横向裂纹而导致的断轨事故。铁路运营商通过更换钢轨、目视检查和钢轨超声波探伤进行定期维护。这些措施代表了一个显着的成本，创造了研究裂纹扩展的需要。作为这项研究的一部分，进行了钢轨弯曲试验的轨道上，已被赋予人为引入裂纹的轨头，调查横向裂纹扩展速率。此外，还提出了一种用有限元法估算横向裂纹扩展的方法。通过与实际钢轨弯曲试验结果的比较，验证了该方法的有效性。
Rail breakages due to transverse cracks originating from gauge corner cracks have been occurring in heat-treated rails. Railway Operators conduct periodic maintenance by replacing rails, through visual inspection and rail ultrasonic flaw detection. These measures represent a significant cost, creating the need for research on crack propagation. As part of this research, rail bending tests were carried out on rails which have been given artificially introduced cracks on the rail head, to investigate the transverse crack growth rate. In addition, a method was developed for estimating transverse crack growth using FEM. This method was verified by comparing estimated values with actual rail bending test results.