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The aim of this paper is to analyze the static stress for the defective steel-rail and wheel in contact using the finite element method. The riding quality, safety, and stability depend on the contact design of wheel and steel-rail. The crack defects exist in the steel-rail due to the manufacturing process will decrease the strength of the rail. The strength of the steel-rail must be large enough to prevent the yielding and fracture. The model of steel-rail and wheel was constructed by using the graphic software, Solid Works. The finite element software, ANSYS, was employed to calculate the stress distribution. The contact effect between the wheel and steel-rail was considered. Many kinds of cracks exist in the rail were simulated in this study. It was found that the maximum equivalent stress of the defective steel-rail is greater than that of the steel-rail free from the crack defects. The stress concentration exists in the crack tip, which will cause the crack to extend unstably. Finally, the influence of the drilling hole on the steel-rail was also studied. It was found that the stress concentration exists in the hole boundary, in which a crack defect may be initiated.
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