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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2003  >  3(2): 11-17
ZHAO Yong-xiang, HUANG Yu-zhong, GAO Qing. Probabilistic mechanical properties of LZ50 axle steel for railway vehicles[J]. Journal of Traffic and Transportation Engineering, 2003, 3(2): 11-17.
Citation: ZHAO Yong-xiang, HUANG Yu-zhong, GAO Qing. Probabilistic mechanical properties of LZ50 axle steel for railway vehicles[J]. Journal of Traffic and Transportation Engineering, 2003, 3(2): 11-17.
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Probabilistic mechanical properties of LZ50 axle steel for railway vehicles

  • 1.

    Institute of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China

  • 2.

    Department of Applied Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China

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  • Author Bio:

    ZHAO Yong-xiang (1963-), male, PhD, professor, 86-28-87602465, yxzhao@home.swjtu.edu.cn

  • Received Date: 2002-11-03
  • Publish Date: 2003-06-25
    Abstract
  • Experimental study on the probabilistic mechanical properties was performed on the LZ50 axle steel for railway vehicles.The unified approach for determining appropriate statistical models of the limited fatigue reliability data was developed to analyze the present test data.The six commonly used distributions, namely three parameter Weibull, two parameter Weibull, normal, lognormal, extreme maximum value, and extreme minimum value, were compared in fits of the data from the three considerations of goodness-of-fit, consistency of failure mechanism and safety in tail region predictions.From the viewpoint of safety, the extreme minimum value distribution was selected as an optimal model of the data.A method based on this distribution was proposed for the estimation of mechanical properties under given reliability and confidence levels.The method has been well used for the estimation of probabilistic parameters of the mechanical properties of the present material.

     

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