文献类型：期刊文献

英文题名：An approximative solution for limit load of piping branch junctions with circumferential crack and finite element validation

作者：Xuan, Fu-Zhen[1]; Liu, Changjun[1]; Li, Pei-Ning[1]

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

年份：2005

卷号：235

期号：7

起止页码：727

外文期刊名：NUCLEAR ENGINEERING AND DESIGN

收录：;EI(收录号：2005048800254);WOS:【SCI-EXPANDED(收录号:WOS:000226813500001)】；

语种：英文

外文关键词：Computer simulation - Computer software - Crack initiation - Finite element method - Loads (forces) - Mathematical models - Poisson ratio - Stress analysis - Tensile stress - Yield stress

摘要：This paper is concerned with the prediction of limit load of the piping branch junctions with circumferential crack under internal pressure. Recently, we have developed a new approach for predicting the limit load of two-cylinder intersection structures with diameter ratio larger than 0.5, which has been successfully applied to defect free cases under various loading conditions. In the present work, we consider the extension of the approach to cover cracked piping branch junctions. On the basis of stress analysis in the vicinity of intersection line, a closed form of limit load solution for piping branch junctions with circumferential crack was developed. Then, 36 finite element (FE) models of piping branch junction with various dimensions of structure and crack were analyzed by using nonlinear finite element software. The limit loads from FE analysis and the proposed solution are compared with each other. Overall good agreement between the estimated solutions and the FE results provides confidence in the use of the proposed formulae for defect assessment of piping branch junctions in practice. (C) 2004 Elsevier B.V. All rights reserved.