标题：Residual stresses in the welding joint of the nozzle-to-head area of a layered high-pressure hydrogen storage tank
作者：Xu, Shugen;Wei, Renchao;Wang, Weiqiang;Chen, Xuedong
作者机构：[Xu, S] College of Chemical Engineering, China University of Petroleum (Huadong), Qingdao 266580, China;[ Wei, R] College of Chemical Engineering, Chi 更多
通讯作者地址：[Xu, SG]China Univ Petr Huadong, Coll Chem Engn, Qingdao 266580, Peoples R China.
来源：International journal of hydrogen energy
关键词：Residual stress;Girth welding joint;High-pressure hydrogen storage tank;Finite element method
摘要：In this study, a sequentially coupling finite element analysis (PEA) program was utilized to simulate the welding temperature and predict the residual stress in the weld and Heat Affect Zone (HAZ) between the nozzle and the head. The results of a numerical calculation indicated that complex residual stresses were generated and concentrated in the weld and HAZ. Due to the existence of the interlayer gap between the two layers of the head, discontinuous stress distributions occurred. There were several sections where there are stress concentrations because of the discontinuous structure. The influences of welding heat input and preheating temperature were also investigated in this study. When the preheating temperature increased, the peak residual stresses in the structure decreased. The welding heat input had little effect on the residual stresses. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.