摘要
对Q345钢的T型单边焊接接头在弯曲循环载荷下的疲劳裂纹产生位置进行了研究,并计算了结构件的名义循环应力最大位置(不考虑焊接引起的截面变化),实际循环应力最大位置(考虑焊接引起的截面变化)。结果表明:疲劳试验中的名义应力最大位置不能反映焊接结构件的真实应力分布情况,而通过考虑焊接引起的截面变化的理论计算和有限元仿真得出的应力分布较为准确,由此得到的最大应力处为焊趾处,与裂纹位置一致。
The location of fatigue crack of T-type single-side welded joint of Q345 steel under bending cyclic load is studied,and the maximum position of nominal cyclic stress(regardless of the change of section caused by welding)and the maximum position of actual cyclic stress(considering the change of section caused by welding)are calculated.The results show that the maximum position of nominal stress in fatigue test can not reflect the real stress distribution of welded structure,but the stress distribution obtained by theoretical calculation and finite element simulation considering the change of section caused by welding is more accurate.The maximum stress obtained is at the weld toe,which is consistent with the crack position.
作者
骆波
邵力
张洵浩
卢曦
Luo Bo;Shao Li;Zhang Xunhao;Lu Xi(College of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《农业装备与车辆工程》
2021年第3期21-24,共4页
Agricultural Equipment & Vehicle Engineering
基金
国家自然科学基金资助项目(51975379)
上海自然科学基金资助项目(19ZR1435500)。
关键词
T型焊
弯曲疲劳
有限元分析
应力场
T-joint weld
bending fatigue
finite element analysis
stress field
