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首页> 外文会议>Proceedings of the ASME/IEEE joint rail conference 2009 >ESTIMATION OF RESIDUAL STRESS DISTRIBUTION IN RAILROAD WHEELS
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ESTIMATION OF RESIDUAL STRESS DISTRIBUTION IN RAILROAD WHEELS

机译：铁路车轮残余应力分布的估算

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摘要

Residual stresses in railroad wheel rims significantly affect the wheel failure life; therefore, it is important to consider residual stresses for wheel failure analysis. In this paper, an advanced computational methodology is developed to estimate residual stresses developed during both the manufacturing process and under service conditions. To estimate the residual stresses in the wheel, three-dimensional decoupled thermal-structural analyses are performed. To simulate the manufacturing process, thermal analysis is performed with convection boundary conditions on the wheel surfaces. The temperature distributions obtained from this thermal analysis are input as loads for structural analysis. The results represent as-manufactured residual stresses. To simulate the thermal brake loading under service conditions, thermal analysis is performed using a heat flux boundary condition on the tread surface. Structural analysis is performed, including the estimated as-manufactured residual stress as initial stress, and using the temperature distributions obtained from thermal analysis of the on-tread braking. The resultant stresses represent the complex combination of residual stresses developed during both the manufacturing process and on-tread braking. The computed results are compared with the experimental data obtained at TTCI and the values reported in the literature.
机译：车轮轮辋上的残余应力会极大地影响车轮的使用寿命。因此，在车轮故障分析中考虑残余应力很重要。在本文中，开发了一种先进的计算方法来估计在制造过程和使用条件下产生的残余应力。为了估计车轮中的残余应力，进行了三维解耦的热结构分析。为了模拟制造过程，对车轮表面的对流边界条件进行热分析。从该热分析获得的温度分布作为结构分析的载荷输入。结果代表了制造后的残余应力。为了模拟使用条件下的热制动器负载，使用胎面表面上的热通量边界条件进行热分析。执行结构分析，包括将估计的制造残余应力作为初始应力，并使用从踩踏制动的热分析获得的温度分布。合成应力代表了在制造过程和踩踏制动过程中产生的残余应力的复杂组合。将计算结果与在TTCI上获得的实验数据以及文献中报道的值进行比较。

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