电焊机2025，Vol.55Issue(12)：9-16,25,9.DOI:10.7512/j.issn.1001-2303.2025.12.02
基于数值模拟的钛合金管对接焊缝残余应力及疲劳寿命研究
Research on Residual Stress and Fatigue Life of Butt Weld of Titanium Alloy Pipe on Numerical Simulation
XU Shaofeng 1LU Lili 1LIN Tengfei 1HAN Zheng 1FENG Guocai 1GONG Ya 1REN Liping1
作者信息
- 1. Nuclear Power Institute of China,Chengdu 610213,China
- 折叠
摘要
Abstract
To investigate the residual stress distribution characteristics and fatigue life of titanium alloy tube butt welds,a nu-merical simulation model for welding processes was established based on ABAQUS.The double ellipsoid heat source model was employed to characterize the heat flux distribution of tungsten inert gas(TIG)welding.The temperature field and re-sidual stress during welding were solved using a sequentially coupled thermo-elastoplastic method,and experimental valida-tion was conducted through the full strain release technique.Based on the FE-SAFE platform,the Brown-Miller model was applied to predict the fatigue life of the tube butt weld.Results indicate that the simulation results exhibit high consistency with experimental measurements.Significant axial compressive stress exists at the weld surface center,reaching a maximum value of-240 MPa.The residual stress gradually transitions from compressive to tensile stress when moving from the weld center toward the base metal.Under service conditions,the maximum residual stress occurs in the weld heat-affected zone,with a predicted service life of 104.2 cycles,meeting the required service life specifications.The multi-field coupling simula-tion methodology and life prediction model developed in this study provide theoretical support and technical reference for optimizing titanium alloy welding processes,controlling weld quality,and enhancing equipment reliability.关键词
钛合金管对接焊缝/残余应力/疲劳寿命/有限元仿真/焊接工艺Key words
Titanium alloy tube butt welds/residual stress/fatigue life/finite element simulation/welding process分类
矿业与冶金引用本文复制引用
XU Shaofeng,LU Lili,LIN Tengfei,HAN Zheng,FENG Guocai,GONG Ya,REN Liping..基于数值模拟的钛合金管对接焊缝残余应力及疲劳寿命研究[J].电焊机,2025,55(12):9-16,25,9.
