标题：Numerical investigation on weld residual stresses in tube to tube sheet joint of a heat exchanger
作者：Xu, Shugen; Wang, Weiqiang
作者机构：[Xu, Shugen] China Univ Petr Huadong, Coll Chem Engn, Qingdao 266555, Peoples R China.; [Xu, Shugen] China Univ Petr Huadong, State Key Lab Heavy Oi 更多
通讯作者地址：[Xu, SG]China Univ Petr Huadong, Coll Chem Engn, Qingdao 266555, Peoples R China.
来源：INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
关键词：Finite element analysis; Residual stresses; Tube to tube sheet weld
摘要：Crack development in weld of the tube to tube sheet region of heat exchanger is a common problem. The residual stresses associated with welding can play a major role in this situation. In this paper, the Finite Element Method (FEM) is used to predict the residual stresses in a tube to tube sheet weld. The effect of heat input, preheating temperature, and gap between tube and tube hole on residual stresses was also investigated by numerical simulation. The peak Mises residual stress occurs in the base metal near the interface between surface welding layer and base metal. The heat input has little effect on the residual stresses. The maximum residual stress is determined by the yield strength rather than heat input. With the preheating temperature increasing, the peak hoop stresses are decreased. With the gap between tube and tube hole increasing, the residual stresses are increased. (c) 2012 Elsevier Ltd. All rights reserved.