| T型单边焊接接头弯曲疲劳裂纹位置研究 |
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| 引用本文： | 骆波,邵力,张洵浩,卢曦.T型单边焊接接头弯曲疲劳裂纹位置研究[J].农业装备与车辆工程,2021(3). |
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| 作者姓名： | 骆波 邵力 张洵浩 卢曦 |
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| 作者单位： | 上海理工大学机械工程学院 |
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| 基金项目： | 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)。 |
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| 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。
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| 关 键 词： | T型焊 弯曲疲劳 有限元分析 应力场 |
Study on Bending Fatigue Crack Location of T-Type Single-side Welded Joint |
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| Luo Bo,Shao Li,Zhang Xunhao,Lu Xi.Study on Bending Fatigue Crack Location of T-Type Single-side Welded Joint[J].Agricultural Equipment & Vehicle Engineering,2021(3). |
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| Authors: | Luo Bo Shao Li Zhang Xunhao Lu Xi |
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| Institution: | (College of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China) |
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| Abstract: | 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. |
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| Keywords: | T-joint weld bending fatigue finite element analysis stress field |
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