文章摘要
邹阳帆,王非凡,李文亚,等.回填式搅拌摩擦点焊接头多点拉剪行为研究[J].精密成形工程,2019,11(6):35-41.
ZOU Yang-fan,WANG Fei-fan,LI Wen-ya,et al.Tensile-shear Behavior of Refill Friction Stir Spot Welded Multi-Point Joints[J].Journal of Netshape Forming Engineering,2019,11(6):35-41.
回填式搅拌摩擦点焊接头多点拉剪行为研究
Tensile-shear Behavior of Refill Friction Stir Spot Welded Multi-Point Joints
投稿时间:2019-08-29  修订日期:2019-11-10
DOI:10.3969/j.issn.1674-6457.2019.06.006
中文关键词: 回填式搅拌摩擦点焊  2219铝合金  多点接头  力学性能  数值模拟
英文关键词: refill friction stir spot welding  2219 aluminum alloy  multi-point joint  mechanical properties  numerical simulation
基金项目:国家自然科学基金(U1637601)
作者单位
邹阳帆 1. 西北工业大学 材料学院 凝固技术国家重点实验室 陕西省摩擦焊接工程技术重点实验室西安 710072 
王非凡 2. 北京宇航系统工程研究所北京 100076 
李文亚 1. 西北工业大学 材料学院 凝固技术国家重点实验室 陕西省摩擦焊接工程技术重点实验室西安 710072 
杨夏炜 1. 西北工业大学 材料学院 凝固技术国家重点实验室 陕西省摩擦焊接工程技术重点实验室西安 710072 
禇强 1. 西北工业大学 材料学院 凝固技术国家重点实验室 陕西省摩擦焊接工程技术重点实验室西安 710072 
谷晨 3. 首都航天机械有限公司北京 100076 
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中文摘要:
      目的 研究焊点数量及分布对回填式搅拌摩擦点焊接头力学性能的影响。方法 选取2 mm的2219-O和8 mm的2219-CS铝合金板,采用试验研究和数值模拟相结合的方式,研究不同焊点数量(2点、3点和4点)及焊点分布对回填式搅拌摩擦点焊接头力学性能的影响,以及在拉剪力作用下接头的应力分布状态。结果 多点接头成形良好,无飞边、毛刺产生;随着焊点数量的增加,接头力学性能逐渐提高,并且当上板受力侧焊点数量分布较多时,接头承载力较高。结论 在拉剪过程中,靠近上板受力侧的焊点承受较大作用力。当受力侧仅有一个焊点时,该焊点附近应力集中比较明显;当受力侧有两个平行焊点时,焊点平分载荷。当焊点数为4且呈正四边形分布时,接头承载力较高。
英文摘要:
      The paper aims to investigate the influence of the number and distribution of welding spots on the mechanical properties of refill friction stir spot welded joints. 2 mm 2219-O and 8 mm 2219-CS aluminum alloy were selected. A combination of experiment and numerical simulation was used to study the effect of welding spots number (2 points, 3 points and 4 points) and their distribution on the mechanical properties and the stress distribution under the shear test. The results showed that the multi-point joint was well formed, without flash and burr. With the increase of welding spots, the mechanical property of joints was improved gradually. When more welding spots were distributed on the stressed side of the upper plate, the joint strength was higher. The simulation results show that in tensile –shear test, the welding joints near the stressed side of the upper plate bear the larger force. When there is only one welding spot on the stressed side, the stress concentration near the welding spot is obvious. However, when there are two solder joints parallel to the stressed side, the joint stress distribution is more uniform. Therefore, when there are 4 solder joints and the distribution is quadrilateral, the mechanical properties of joints are higher.
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