Limit Load Analysis of Elbow with Local Wall Thinning under Combined Loads

摘要：

　　Generally elbow is a stress concentration component and a weak part in piping system.The local wall thinning(LWT) is a kind of common volume defect in pressure pipe.The limit loads of elbows with LWT under pressure, bending moment, torque and their combined loads have been studied in detail by orthogonal experimental design with finite element method.The results of studies have shown that the influence of depth and circumferential length of LWT defect on the limit load is more obvious compared to that of axial length when an elbow is under pressure, bending moment or torque.The change of limit bending moment and torque with the depth of LWT defect and circumferential length is significant for an elbow under combined bending moment and torque.At last, by regression results of finite element analysis results, the safety assessment equations for elbow under combined in-plane closing bending moment and torque were proposed.

关键词： Elbow Limit Load Torque Local Wall Thinning

作者: Peng Cui Changyu Zhou

作者单位: School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China

会议类型: 国际会议

会议名称: 2014 International Symposium on Structural Integrity,ISSI2014(2014国际结构完整性学术会议)

会议地点: 兰州

会议语种:英文

页码: 259-266

在线出版日期: 2014-08-20（万方平台首次上网日期，不代表论文的发表时间）