Weld Residual Stress in Tube to Tube Sheet Joints of a Heat Exchanger by Experimental and Finite Element Simulation

摘要：

　　Shell-and-tube heat exchangers are widely used in petrol and petro-chemical industries.But weld residual stresses are generated in the tube-to-tube sheet joint and have a great effect on stress corrosion cracking.Therefore,a good prediction and an efficient evaluation of the weld residual stress are necessary to assure the structure integrity.In this work,X-ray diffraction measurement and finite element method have been used to study the residual stress distribution.The results show that the large tensile residual stresses,which have exceeded the yield stress,are generated in the tube to tube sheet joints,leading that the joints become the weakest parts of the heat exchanger.In the central surface part,a wave shape stress distribution is generated along the centerline of tube 1 and tube 3.

关键词： Shell-and-tube heat exchangers Residual stress Finite element simulation X-ray diffraction experiment

作者: Yu Wan Wenchun Jia Jianbo Gao

作者单位: College of Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,PR China China Institute of Atomic Energy,Beijing 102431,PR China

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 306-310

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）