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Analysis Approach to Durability Based on Material Initial Fatigue Quality and S-N Curve

机译:基于材料初始疲劳质量和S-N曲线的耐久性分析方法

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摘要

Based on probabilistic fracture mechanics approach, a new concept of material initial fatigue quality (MIFQ) is developed. Then, the relation between S-N curve and crack propagation curve is studied. From the study, a new durability analysis method is presented. In this method, S-N curve is used to determine crack growth rate under constant amplitude loading and evaluate the effects of different factors on durability and then the structural durability is analyzed. The tests and analyses indicate that this method has lower dependence on testing, and higher accuracy, reliability and generality and is convenient for application.
机译:基于概率断裂力学方法,提出了材料初始疲劳质量(MIFQ)的新概念。然后,研究了S-N曲线与裂纹扩展曲线之间的关系。通过研究,提出了一种新的耐久性分析方法。在该方法中,使用S-N曲线确定恒定振幅载荷下的裂纹扩展速率,并评估不同因素对耐久性的影响,然后分析结构的耐久性。通过测试和分析表明,该方法对测试的依赖性较低,具有较高的准确性,可靠性和通用性,便于应用。

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