Pradeep Kumar Jeyaraj
Department of Production Engineering, PSG College of Technology, Coimbatore 641 004, Tamil Nadu, India.
Materials (Basel). 2018 Jun 14;11(6):1010. doi: 10.3390/ma11061010.
The temperature distribution occurring at the interface while joining a simple electrical contact comprising of a copper wire and a copper sheet using ultrasonic metal welding was analyzed using finite element method. Heat flux due to plastic deformation and friction was calculated and provided as input load for simulation of temperature distribution. The results of temperature obtained from simulation are found to be in good agreement with the results of temperature from experiments measured using thermocouple. Special focus was given to how the heat generated at the wire⁻sheet interface affect the strength of the joint in tension. With the knowledge of heat generated at the interface while welding, it is possible to control the strength of the joint and produce defect free joints. Based on the results from finite element analysis and experiments, it is observed that the influence of heat developed due to friction and plastic deformation of metallic specimens has a significant effect on the progress of welding and strength of the joint.
采用有限元方法分析了在使用超声金属焊接连接由铜线和铜片组成的简单电触头时，界面处出现的温度分布。计算了由于塑性变形和摩擦产生的热通量，并将其作为模拟温度分布的输入载荷。发现模拟得到的温度结果与使用热电偶测量的实验温度结果吻合良好。特别关注了线-片界面处产生的热量如何影响接头的拉伸强度。了解焊接时界面处产生的热量后，就有可能控制接头的强度并生产无缺陷接头。基于有限元分析和实验的结果，可以观察到金属试样的摩擦和塑性变形产生的热量对焊接过程和接头强度有显著影响。
