It is concluded that, the residual stress induced by cold expansion can maintain enough strength to prevent and retard fatigue crack initiation and growth in rail bolt hole.
结果表明，冷扩张过程所引入的切向残余压应力能保持足够的强度，以对钢轨螺栓孔起到显著的防裂和止裂作用。
The significance of stress corrosion test for rail steel is demonstrated.
本文首先阐述了研究轨钢应力腐蚀的意义。
The coupling between bridge and track adopts by beam unit, modulus of electricity of and yielding stress according to the broken line of the non-liner rail longitudinal resistance of displacement.
桥梁和轨道的联结采用非线性梁单元模拟，其材料弹性模量和屈服应力通过轨道纵向位移阻力与梁轨相对位移关系的双折线化确定；
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。
The calculation indicates that the maximum shear stress around inclusion is 1.2-1.7 times of that without inclusion, which has a harmful effect on the fatigue endurance of rail.
计算发现，夹杂物周围的最大剪切应力是不含夹杂物时的1.2～1.7倍，这对钢轨疲劳寿命造成有害影响。
Optimized design of rail wheel and axle is finished. Conclusion This result satisfies our national railway standard. The maximum stress is less than the yield stress.
结论实现火车轮轴的优化设计，优化后轮轴的最大应力均小于屈服应力，满足我国铁路的标准要求。
The analysis results indicate that the attenuation of additional dynamic stress along depth is reduced with existence of the structure under rail.
结果表明轨下构筑物的存在将减弱列车动应力往深层传递的衰减。
The variability of weather and climate is a cause of considerable stress to CWR track which has influence on the stability of rail.
自然环境条件下的温度变化会在钢轨内部产生拉伸应力，影响无缝线路轨道的稳定性。
Based on the model of multi-span slender rod, the moment equations and deflection equations of elevator rail with duplex safety gear were established and resolved in a complex state of stress.
结合双安全钳作用特点，以多跨度细长杆模型为基础，建立并求解了电梯导轨在复杂受力状态下的弯矩方程和挠曲线方程。
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。
Results show that the additional temperature stress and deformation of the continuously welded turnout will increase with the increase of rail temperature.
结果表明：无缝道岔的附加温度力与变形随轨温变化幅度的增大而增加；
For rail anti-slide piles, the bending moment, normal stress and anti-slide force of rail anti-slide pile are calculated inversely based on flexure deformation measured by inclinometer.
对于钢轨抗滑桩，把测斜仪所测横向变形当作钢轨桩的弯曲变形，然后再反算出钢轨桩的弯矩、正应力和抗滑力。
The finite element analysis of the wheel rail contact shows that the maximum stress under the subsurface exceeds first yield strength, which leads to plastic deformation.
在对轮-轨系统进行有限元分析的基础上，研究了轨道的受力情况和摩擦系数对应力分布的影响，讨论了轨道的弹塑变形和安定极限。
The characteristic of the temperature stress in the jointless switch lies in supporting additional temperature stress on the stock rail, the stress and the displacement presents the complex nature.
无缝道岔温度力的特点在于基本轨要承受附加温度力的作用，岔内钢轨受力和位移状况复杂。
The effects of case parameters on the distribution of elastic-plastic stress hi railhead are analyzed including lateral displacement, gross rail load on axle and constrained conditions of rail bottom.
对于工况参数，主要分析了横移量、轴重和轨底约束对轮轨滚动接触应力场的影响。
Rail-wheel contact stress depends to a large extent on the matching of rail-wheel geometry parameters.
轮轨接触几何参数的匹配优劣直接影响着轮轨接触应力值的大小。
Rail-wheel contact stress depends to a large extent on the matching of rail-wheel geometry parameters.
轮轨接触几何参数的匹配优劣直接影响着轮轨接触应力值的大小。
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