Finite element analysis of the wear fatigue of rails with gradient structures
Finite element analysis of the wear fatigue of rails with gradient structures
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DOI：
10.1016/j.matlet.2018.08.012
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发表时间：
2018-11
影响因子：
3
通讯作者：
Jian Wang;Caizhi Zhou
中科院分区：
文献类型：
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作者：
Jian Wang;Caizhi Zhou
我们首次进行有限元建模，分析了滚动滑动接触的梯度结构（GS）对钢轨耐磨疲劳的影响。我们发现GS可以通过降低钢轨表面的最大水平和垂直位移来增强钢轨的耐磨疲劳性能。 GS层越厚，性能越好。对于固定的GS层厚度，增加表面屈服强度可以有效减少表面位移。这项研究的结果可以为处理钢轨钢中的梯度结构以获得优异的机械性能提供设计指南。
We performed the finite element modeling for the first time to analyze the effect of gradient structures (GS) on the wear fatigue-resistant of rails in the rolling-sliding contacts. We found that GS can enhance the wear fatigue-resistant of rails by reducing the maximum horizontal and vertical displacements on the surface of rails. The thicker GS layers, the better the performance is. For a fixed GS layer thickness, increasing the surface yield strength can effectively reduce surface displacements. The outcome from this study can provide the design guideline for processing the gradient structures in the rail steels to obtain superior mechanical properties.