基于异种钢材焊点失效的仿真建模方法及验证  

Simulation Method and Verification Based on Dissimilar Steel Welding Spot Failure

作　　者：李金柱 石兴博 张赛[1,2] 任鹏飞 田杰斌[1,2] 罗原 Li Jinzhu;Shi Xingbo;Zhang Sai;Ren Pengfei;Tian Jiebin;Luo Yuan(China Automotive Technology&Research Center Co.,Ltd.,Tianjin 300300,China;CATARC(Tianjin)Automotive Engineering Research Institute Co.,Ltd.,Tianjin 300300,China)

机构地区：[1]中国汽车技术研究中心有限公司,天津300300 [2]中汽研(天津)汽车工程研究院有限公司,天津300300

出　　处：《机电工程技术》2022年第5期40-43,共4页Mechanical & Electrical Engineering Technology

基　　金：山东省重点研发计划项目(重大科技创新工程)(编号:2019TSLH0103)。

摘　　要：目前点焊是车身主要的连接方式,当发生汽车碰撞时,焊点连接的失效将对整车的碰撞性能产生影响,进而产生不必要的损失,所以对焊点失效模拟的研究对提高汽车碰撞的模拟精度有非常重要的意义。针对整车不同材料之间焊点性能不同而导致失效模拟精度不高的问题,通过试验测试和仿真数值模拟方法对电阻点焊的失效进行研究,构建两种金属板材不同焊点力学性能试验获取焊点不同方向失效参数,通过口字型梁的压溃仿真与试验结果对比,验证了两种金属板材焊点失效参数的有效性。结果表明,焊点不同方向的受力差异较大,试验测试得到的焊点失效参数能真实反映焊点受力和失效情况,仿真得到的峰值载荷与试验结果的误差小于2.9%,可以满足工程开发要求。At present,spot welding is the main connection mode of vehicle body.In case of vehicle collision,the failure of weld joint connection will affect the collision performance of the whole vehicle,and then produce unnecessary losses.Therefore,the research on weld joint failure simulation is of great significance to improve the simulation accuracy of vehicle collision.Aiming at the problem that the failure simulation accuracy is not high due to the different properties of solder joints between different materials of the whole vehicle,the failure of resistance spot welding was studied through experimental test and simulation numerical simulation methods,the mechanical property test of different solder joints of two kinds of metal plates was constructed,and the failure parameters of solder joints in different directions was obtained.The effectiveness of the failure parameters of solder joints of two kinds of metal plates was verified by comparing the crushing simulation and test results of I-beam.The results show that the stress of solder joints in different directions varies greatly.The solder joint failure parameters obtained from the test can truly reflect the stress and failure of solder joints.The error between the peak load obtained by simulation and the test results is less than 2.9%,which can meet the requirements of engineering development.

关 键 词：异种材料 焊点失效 仿真 

分 类 号：TG44[金属学及工艺—焊接]