作　　者： ; ;

机构地区： 北方交通大学

出　　处： 《铁道学报》 1996年第6期116-121,共6页

摘　　要： 本文以Ｂｏｇｄａｎｏｆ提出的Ｂ模型为基础，运用概率统计及随机过程理论，探讨在多级载荷作用下的疲劳破坏过程。在分析过程中，把疲劳损伤的许多变量处理成模型的内在因子，从而使它更贴近复杂的疲劳过程。将恒幅载荷作用下的损伤累积过程推广到多级载荷作用甚至随机载荷作用的情况，提出了在多级载荷作用下。 In this paper,we used the B Model which is proposed by Bogdanoff and the theory of probabilistic statistics and stochastic process to analyse the process of fatigue failure under multi stage loading.In the process of analysis,we regarded several variabilites as inherent parameters of the model.According to the result of the constant amplitude loading,we deduced the analysis process of fatigue failure for multi stage loading or even the process of the stochastic loading,and finally,a method is given out which can deal with the load interaction of multi stage loading .At the end of the paper,a comparison of theoretical and testing result is given out.It shows farily reasonable.

关 键 词： 累积损伤 多级载荷 概率 疲劳破损

领　　域： [理学] [理学]