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以50kg级鱼尾板的试验研究为例,分析了目前铁路干线常用鱼尾板的裂纹扩展速率da/dN和裂纹扩展门槛值△K_(th);提出了改善鱼尾板使用寿命,降低损伤和折断的措施。
Taking 50kg-class fishplate as an example, the crack growth rate da / dN and the crack propagation threshold △ K_ (th) which are commonly used in railway trunk are analyzed. It is proposed to improve the service life of the fishplate and to reduce the damage And break the measure.