由剩余强度全域测试建立的疲劳可靠性估算模型

在全域疲劳加载下对处于不同损伤状态的材料进行剩余强度测试，得到剩余强度数据的函数曲线表达式，并由此建立剩余强度模型的一般形式，给出材料在常幅和变幅加载作用下的剩余强度退化模型。在此基础上研究常幅和多级加载下的疲劳可靠性分析方法。应用应力－强度干涉可靠性分析模型进行实例分析计算，结果与实验值较为符合，说明所提出的剩余强度模型是合理的。

FATIGUE RELIABILITY EVALUATION MODEL BASED ON RESIDUAL STRENGTH TESTS OF WHOLE DAMAGE REGION

Residual strength is obviously the basis of residual strength model. As a result material residual strength was measured on various damage states.The test data of residual strength was well function expressed. The general form of the residual strength analytical model is put forward and based on it the expression to describe the degradation rule of constant amplitude loading and two block loading is also studied analytically and experimentally. and subsequently approach to analyze the fatigue reliability of material under constant amplitude and two block amplitude loading is given in detail. Two examples have been carried out to demonstrate the validity of the presented model. It is show that the estimation has well correlation with the experiment.