| 基于盲孔法的网架焊接空心球节点球面焊趾处残余应力的测试 |
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| 引用本文： | 李洋,雷宏刚. 基于盲孔法的网架焊接空心球节点球面焊趾处残余应力的测试[J]. 科学技术与工程, 2020, 20(7): 2816-2822 |
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| 作者姓名： | 李洋 雷宏刚 |
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| 作者单位： | 太原理工大学建筑与土木工程学院,太原030024;太原理工大学建筑与土木工程学院,太原030024 |
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| 基金项目： | 国家自然科学基金(51578357)第一作者：李 洋(1994—),男,山西太原人,研究生,主要研究方向为钢结构疲劳。通信作者：雷宏刚,男,教授,博士研究生导师。主要从事钢结构研究。E-mail：lhgang168@126.com |
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| 摘 要： | 基于盲孔法对3种规格的焊接空心球节点球面焊趾处焊接残余应力进行了试验测量,根据常规模型和Kirsch理论解对比计算了本次试验选取的应变片的应变释放系数。依据Scara-Mangas经验公式对计算得到的球面径向、环向焊接残余应力进行塑性修正,最终得出球面焊接残余应力分布图。探讨了焊接残余应力对工程领域中节点疲劳的影响。
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| 关 键 词： | 焊接残余应力 焊接空心球节点 盲孔法 |
| 收稿时间： | 2019-06-01 |
| 修稿时间： | 2019-11-08 |
Test and Research on Residual Stress of Hollow Ball Joints in Grid Welding Based on Blind Hole Method |
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| Li Yang,Lei Honggang. Test and Research on Residual Stress of Hollow Ball Joints in Grid Welding Based on Blind Hole Method[J]. Science Technology and Engineering, 2020, 20(7): 2816-2822 |
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| Authors: | Li Yang Lei Honggang |
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| Affiliation: | College of Architecture and Civil Engineering,Taiyuan University of Technology;China,College of Architecture and Civil Engineering,Taiyuan University of Technology;China |
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| Abstract: | Based on the blind hole method, the residual stress of the spherical weld toe of three kinds of welded hollow spherical joints was tested.The strain release factors of the strain gauge selected in this test is calculated according to the conventional model and the Kirsch theoretical solution. According to the Scara-Mangas empirical formula, the calculated spherical radial and circumferential welding residual stresses are plastically modified, and the residual stress distribution of the spherical welding is finally obtained. The influence of welding residual stress on joint fatigue in engineering field is discussed. |
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| Keywords: | welding residual stress welded hollow spherical joints blind hole method |
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