Calculation of wear on a corrugated rail using a three-dimensional contact model
Calculation of wear on a corrugated rail using a three-dimensional contact model
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DOI：
10.1016/j.wear.2008.01.026
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发表时间：
2008-10
期刊：
影响因子：
5
通讯作者：
G. Xie;S. Iwnicki
中科院分区：
文献类型：
--
作者：
G. Xie;S. Iwnicki
本文介绍了用三维接触模型对钢轨磨损进行仿真的结果。基于变分方法对轮轨接触进行非赫兹非稳态建模[j]Kalker，三维弹性体在滚动接触，Kluwer学术出版社，1990]，磨损被假设成正比的摩擦功。考虑车轮在初始正弦粗糙度上滚动，当使用恒定的法向力和爬电时，发现最大磨损发生在接近初始波长波峰的位置，因此预计粗糙度不会增加。然后使用规定的动态法向力范围来研究磨损与动态力之间的关系，但同样没有发现波纹生长机制。比较了使用赫兹接触和非赫兹接触的磨损计算，并说明了非赫兹影响对磨损计算的重要性。
This paper presents the results from simulations of railhead wear using a three-dimensional contact model. The wheel/rail contact is modelled as non-Hertzian and non-steady based on the Variational Method [J.J. Kalker, Three-Dimensional Elastic Bodies in Rolling Contact, Kluwer Academic Publishers, 1990] and the wear is assumed to be proportional to the frictional work. A wheel rolling over initial sinusoidal roughnesses is considered and when constant values of normal force and creepage are used, it is found that the maximum wear occurs at positions close to the crest of the initial wavelength and therefore roughness is not predicted to grow. A range of prescribed dynamic normal forces were then used to investigate the relationship between wear and dynamic force but again, no corrugation growth mechanism was revealed. Wear calculations using both Hertzian and non-Hertzian contact are compared and the significance of the non-Hertzian effects on the wear calculation is shown.