The testing results about the use of new rail joint was introduced, which include the dynamic flexure stress of upper limb and lower margin of joint bar, shearing stress of horizontally neutral axis.

本文对三种新型钢轨接头现场使用情况的测试结果进行了介绍，主要包括测点处的钢轨接头夹板上、下缘动弯应力、夹板水平中性轴处剪应力。

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As the bolt tension increase, the tension of rail web, stress of joint bar and stress of joint bolt would increase accordingly, but the displacement of rail would become smaller.

螺栓扭矩增大，接头区钢轨轨腰拉力、夹板应力、螺杆内应力都会增大，而钢轨位移会随着螺栓扭矩的增大而减小。

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The NTSB would not clarify Friday whether the April repair to the rail involved the mending or the replacement of the cracked steel joint bar.

WSJ: Probe of Metro-North Derailment in Connecticut Focuses on Rail