• CN:11-2187/TH
  • ISSN:0577-6686

›› 2001, Vol. 37 ›› Issue (12): 86-90.

• 论文 • 上一篇    下一篇

环焊缝管道焊接应力应变三维有限元分析

董俊慧;霍立兴;张玉凤   

  1. 内蒙古工业大学材料科学与工程学院;天津大学
  • 发布日期:2001-12-15

THREE-DIMENSIONAL FINITE ELEMENT ANALYSIS OF WELDING STRESS-STRAIN IN A GIRTH WELDED PIPE

Dong Junhui;Huo Lixing;Zhang Yufeng   

  1. Inner Mongolia Polytechnic University Tianjin University
  • Published:2001-12-15

摘要: 利用ADINA非线性分析程序,考虑材料力学性能依赖于温度变化,对低碳钢管道环焊缝接头进行三维有限元分析。通过焊缝单元“死、活”选择,模拟了焊接热源的移动过程。结果表明:焊缝及附近的轴向残余应力在内表面为拉应力,外表面为压应力;焊缝及附近的环向残余应力在内、外表面均为拉应力。计算值与实测值基本一致,表明有限元法能够有效地预测管道环焊缝接头的残余应力。

关键词: 焊接残余应力, 环焊缝管道, 有限元法

Abstract: Three-dimensional finite element analysis of welding stress-strain in a girth-butt welded pipe is presented, with a nonlinear FE code ADIAN. The pipe material is low-carbon steel. The thermo-physical and mechanical properties of material depend on temperature. The element birth facility in ADINA is used to model the continuous deposition of filler material into the groove. In the girth-welded pipes, axial residual stresses in the weld vicinity are tensile on inner surface and compressive on outer surface. Hoop residual stresses in the weld vicinity are tensile on inner surface and compressive on outer surface. Hoop residual stresses in the weld vicinity are tensile in both inner and outer surfaces. The calculated results are in agreement with the experimental measurements. It is show that FEM can be capable of predicting the welding residual stresses in girth-butt welded pipes effectively.

Key words: Finite element method, Girth welded pipes, Welding residual stress

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