钢轨踏面斜裂纹模拟再现试验研究_交通物流毕业论文_毕业论文网 关键词：钢轨 斜裂纹 接触疲劳 [gap=502]Keywords: Rail, Oblique crack, Contact fatigue
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ellipse oblique crack 椭圆形斜裂纹
unilateral oblique crack 单边斜裂纹
oblique crack on web plate 腹板斜裂缝
Oblique crack of rail tread 钢轨踏面斜裂纹
oblique angle crack 斜角裂缝
As a type of rail defects, rail tread oblique crack has been paid extensively attentions in recent years. It will cause rail transversal failure and endanger the traveling safety if it severely develops.
钢轨踏面斜裂纹属于钢轨疲劳伤损，是近年来反映突出的钢轨伤损类型之一，发展严重时将导致钢轨的横向断裂而危及行车安全，国外及国内已发生多起由踏面斜裂纹导致钢轨横向断裂的事故。
参考来源 - 钢轨踏面斜裂纹扩展行为的仿真研究The finite element software ANSYS was expanded to compute SIF, computing the SIF of unilateral oblique crack, central crack, central oblique crack, cracks at hole.
4．扩展了有限元软件ANSYS计算断裂参量应力强度因子的功能，具体计算了单边斜裂纹、中心裂纹、中心斜裂纹、孔边裂纹的应力强度因子。
参考来源 - 涡轮转子接触应力分析及应力强度因子计算·2,447,543篇论文数据，部分数据来源于NoteExpress
The macro profile and physicochemical examination of the tread oblique crack shows that the crack falls into the category of rolling contact fatigue type.
踏面斜裂纹及断口的宏观形貌和理化检验与分析表明，踏面斜裂纹伤损属于滚动接触疲劳裂纹伤损类型。
The equations of caustic curve and its initial curve for a crack illuminated by an oblique incident light beam in reflection arrangement were deduced using the space analytic geometry method.
本文用空间解析几何方法，推导了在一般非平行斜入射光条件下，裂纹体表面所形成的反射焦散线和初始曲线的方程。
By cracks of square and oblique arch culverts after completion, the paper further analyzes the reasons for crack of non-articulated arch culvert, proposes the preventing measures.
根据正交拱涵和斜交拱涵的工后开裂情况，对无铰拱涵裂纹产生的原因进一步分析并提出预防措施。
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