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Numerical investigation on stress intensity factor in railway wheel-set under the influence of residual stresses induced by press fitting process

机译:压力拟合工艺诱导残余应力影响下铁路轮集应力强度因子的数值研究

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摘要

Train and railway system is one the most common transportation methods in the world. The vast application of railway transportation make it very important to research in this field and improve the knowledge about such system. According to advancements in railway technology, a new type of train wheels named as rim-wheels are presented in recent years that their fracture is studied in this research. The aim of the present paper is to investigate stress intensity factors in railway wheels for some major parts. The study also includes a survey on the effect of crack length on crack propagation as one of its main effective factors. Stress intensity values are calculated after stress analysis for different wheel positions by boundary element method. Fatigue crack growth path is calculated and its propagation is also estimated and effect of different parameters is studied on fatigue crack growth and path.
机译:火车和铁路系统是世界上最常见的运输方式。 广阔的铁路运输应用使其对研究中的研究非常重要,并提高这些系统的知识。 根据铁路技术的进步,近年来近年来介绍了一种名为rim-wheels的新型列车车轮,在这项研究中研究了它们的骨折。 本文的目的是研究铁路车轮的应力强度因子,以获得一些主要部分。 该研究还包括关于裂缝长度对裂缝繁殖的影响作为其主要有效因素之一的调查。 通过边界元方法在不同车轮位置的应力分析之后计算应力强度值。 计算疲劳裂纹生长路径,并估计其传播,并研究了不同参数的效果对疲劳裂纹生长和路径进行了研究。

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