文献类型：会议论文

英文题名：FAD-based reliability analysis approach to structural integrity assessment

作者：Liu, CJ; Dong, LY

机构：[1]E China Univ Sci & Technol, Dept Engn Mech, Shanghai 200237, Peoples R China

会议论文集：Fracture Mechanics Symposium

会议日期：SEP 09-12, 2004

会议地点：Huangshan, PEOPLES R CHINA

语种：英文

外文关键词：structure reliability analysis; probabilistic assessment; probabilistic failure assessment diagram

摘要：In the present work, a simplified probabilistic failure assessment diagram (PFAD) was developed to perform a reliability analysis for defected structures. Such a PFAD was established on the basis of the following assumptions, i.e., 1) the load is a deterministic variable; 2) the yield strength and fracture toughness satisfy normal distribution and their variational coefficients are constant; 3) the initial crack length remains unchangeable. The investigation shows that the distribution of random safety factor and failure probability of a structure only depend on the coordinates of the expectation of P (Lr, Kr) in the failure assessment diagram of the simplified option I curve. The failure probability will decrease with the increase of the initial crack length if the expectation of P (Lr, Kr) keeps unchanged. A conservative result will be given when using the PFAD as an elementary reliability analysis method to assess the integrity of a structure. When the secondary stress exists, the conservativeness of the result assessed will increase with the increase of parameter p although the PFAD is only established based on considering primary stress.