疲劳裂纹扩展率表达式是采用疲劳裂纹扩展理论预报疲劳寿命的核心。
The fatigue crack growth rate is the core for predicting fatigue life by use of fatigue crack propagation (FCP) theory.
基于可靠度理论，本文采用一次二阶矩法(JC法)对疲劳裂纹扩展可靠性进行计算。
Based on reliability theory, the first order second moment method (JC method) is adopted to analyze and compute the fatigue reliability.
该模型数学表达式具有半理论、半经验性质，能较好地反映弹塑性疲劳裂纹扩展的物理特征。
The mathematical expression of this model is half theoretical and half empirical in nature and can well represent the physical characteristics of EPFC growth.
总结了机械寿命预测方法(包括疲劳损伤寿命计算和裂纹扩展寿命计算)，重点在于用理论分析的方法来代替大量的实物试验这一类方法。
Methods of predicting machine life has systematically summarized with the emphasis on those which use theoretical analysis to substitute large scale prototype experiments.
总结了机械寿命预测方法(包括疲劳损伤寿命计算和裂纹扩展寿命计算)，重点在于用理论分析的方法来代替大量的实物试验这一类方法。
Methods of predicting machine life has systematically summarized with the emphasis on those which use theoretical analysis to substitute large scale prototype experiments.
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