Integral inference method for da/dN-ΔK and P-da/dN-ΔK curves

作     者：FU Hui-min WU Qiong 

作者机构：Research Center of Small Sample Technology Beijing University o~ Aeronautics and Astronautics Beijing 100191 China 

出 版 物：《航空动力学报》 (Journal of Aerospace Power)

年 卷 期：2011年第26卷第6期

页      面：1251-1256页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 0825[工学-航空宇航科学与技术] 0701[理学-数学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

主　　题：aero-engine fatigue crack growth(FCG) crack growth rate integral estimate reliability 

摘      要：The integral inference method for fatigue crack growth(FCG) curve was established based on the two-variance regression *** estimates of da/dN-ΔK curve and P-da/dN-ΔK curve with high confidence level and high survival probability were also *** data scatter with stress intensity factor ranges in reality,which limits the group test method s *** presented method analyzes FCG curve as an integration,thus it can exploit the lengthwise information among the FCG rates corresponding to different stress intensity factor ***,compared with group test method,the presented method can not only save specimens,but also have higher precision in the evaluations of da/dN-ΔK and P-da/dN-ΔK curves.