Real Time Monitoring of Spot-welded Joints under Service Load Using Lead Zirconate Titanate (PZT) Transducers
, This paper proposes a non-destructive method to evaluate the mechanical behavior spot-welded joints under service load using Lead Zirconate Titanate (PZT) transducers.A numerical model was developed to understand the response of the Resistance Spot Welding (RSW)joint under service load.Results showed that an opening between the jointed metal sheets of ST14 occurred under tension load, which decreased the contact area hence reduced the strength of the stress wave received by the PZT sensor.Five single lap joint specimens were tested under tension load while being monitored by PZT sensing system and Digital Image Correlation (DIC) system in real time.The data obtained from the DIC system validated the developed numerical model.By comparing the energy index of the signal obtained from the PZT sensing system before loading and after unloading, it was concluded that the RSW joint was intact under service load.Experimental results demonstrated that the proposed non-destructive method based on the active sensing with the energy index can monitor not only the load on a RSW joint but also its health status.
Piezoelectric materials health monitoring PZT (Lead Zirconate Titanate) RSW (Resistance Spot Welding) DIC (Digital Image Correlation) FEM (Finite Element Method) active sensing
Ping Yao Botong Zheng Mina Dawood Linsheng Huo Gangbing Song
School of Electrical and Mechanical, Guangdong Polytechnic Normal University, China;Department of Me Department of Civil and Environmental Engineering, University of Houston, Houston, TX 77204, USA State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, L Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA
国内会议
广州
英文
170-185
2016-12-01（万方平台首次上网日期，不代表论文的发表时间）