Analysis Approach to Durability Based on Material Initial Fatigue Quality and S-N Curve
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.
作 者： Yang Moucun Nie Hong 作者单位： Yang Moucun(College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)Nie Hong(College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
刊 名： 中国航空学报(英文版) ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS 年，卷(期)： 2007 20(6) 分类号： V2 关键词： probabilistic fracture mechanics approach durability S-N curve crack propagation rate initial fatigue quality