Analysis approach to durability based on material initial fatigue quality and S-N curve

作者：Yang Moucun^*; Nie Hong

来源：Chinese Journal of Aeronautics, 2007, 20(6): 518-523.

• probabilistic fracture mechanics approach
• durability
• S-N curve
• crack propagation rate
• initial fatigue quality

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.

• 出版日期2007-12
• 单位南京航空航天大学