摘要
以J-11为填充胶粘剂,采用CO2脉冲激光对低碳钢Q195进行了激光点焊-胶接复合连接试验。对不同焊点排布情况下复合接头的断裂过程进行了研究。结果表明,当只有1个焊点时,复合接头在拉剪载荷作用下,复合接头两端的胶接部分首先开裂,焊点部分最后断裂;当焊点排布方向与受力方向一致时,复合接头内焊点外侧的胶层首先开裂,然后是焊点之间的胶层发生断裂,最后是焊点部分开裂;当焊点排布方向与受力方向垂直时,复合接头内的胶接部分先开裂,焊点部分随后断裂。另外,采用有限元方法对不同焊点排布方式的复合接头受一定拉剪力时,接头内的应力分布情况进行分析,解释焊点排布方式带来的影响,分析结果与试验结果相吻合。
The CO2 pulse laser is used in laser spot weld bonding test using Q195 mild steel and adhesive J-11. The fracture process of laser spot weld bonded （LWSB） joints with different spot arrangements is studied. The results show that the adhesive bonded area in LWSB joint firstly fractures, and then the spot fractures, when there is only one spot in LSWB joint. When the spot arrangement in LSWB joint is parallel to the load direction, the fracture sequence is the adhesive bonded area outside of the spot, and the adhesive bonded area inside of the spot. When the spot arrangement in LSWB joint is vertical to the load direction, the adhesive bonded area of the LWSB first fractures, then the adhesive bonded area and the spot fracture together. Besides, the finite element modeling is used to analyze the influence of spot arrangement in LSWB joint on stress distribution under some tensile-shear condition. The calculated results are in good agreement with the experimental results.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2013年第10期83-90,共8页
Chinese Journal of Lasers
关键词
激光技术
激光点焊-胶接复合
焊点排布
断裂过程
有限元模拟
应力分布
laser technique
laser spot weld bonding spot arrangement
fracture process finite element modelingstress distribution
