Effect of Repair Length on Residual Stresses in a Multi-pass Butt-welded 12Cr1MoV/P91 Dissimilar Pipe

摘要：

　　In this study, experimental and the finite element (FE) methods are utilized to investigate residual stresses of a multi-pass butt-welded 12CrlMoV/P91 dissimilar pipe.X-ray technique is used to validate the FF results.Both methods show that residual stresses are significantly unsymmetrical distributed with respect to weld center line (WCL), and peak stresses exist on the inner surface of P9 1 part.The simulated results are especially in good greement with experimental ones within the weldment and its vicinity.Results for repair welds covering different circumferential angular are also presented to investigate the influence of repair length on residual stresses.It shows the shorter repair develops higher residual stresses, and this effect is more significant within the repairing area than the other regions.

关键词： 3D FE model Dissimilar pipe Residual stresses Repair length

作者: Yanping Zhao Jianming Gong Xiaowei Wang Yangfei Wang Zhiqiang Ge Qingnan Li

作者单位: School of Mechanical and Power Engineering,Nanjing University of Technology,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: 267-274

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）