压力容器2017，Vol.34Issue(9)：61-67,7.DOI:10.3969/j.issn.1001-4837.2017.09.010
外拘束对接管-安全端焊接接头残余应力和变形的影响
Influence of Restraining Control on Residual Stress and Distortion about Nozzle Safe-end Welded Joints
李佳浩 1张颖 1王鑫 1谷文 1陈星2
作者信息
- 1. 中国第一重型机械集团大连核电石化公司,辽宁大连116113
- 2. 北京伊萨科技发展有限公司,北京100095
- 折叠
摘要
Abstract
Based on the finite element model,the restraining condition affecting residual stress and distortion of nozzle safe-end welded joints has been discussed.The results show that the hoop residual stress and the axial residual stress change obviously under different restraining conditions.Under the condition that restrain the side and free the other side,the axial bending effect of pipe is obvious and the tensile stress at weld root is very high due to strain hardening.Under the condition that restrain the two sides during welding and removing the restrain after welding,the axial bending is controled and the tensile stress at weld root is weakened effectively,just the hoop residual stress increases slightly and focus on the middle of pipe thickness.关键词
外拘束/接管-安全端/残余应力/数值模拟Key words
restraining condition/nozzle safe-end/residual stress/numerical simulation分类
机械制造引用本文复制引用
李佳浩,张颖,王鑫,谷文,陈星..外拘束对接管-安全端焊接接头残余应力和变形的影响[J].压力容器,2017,34(9):61-67,7.
