EXPERIMENTAL STUDY OF THE STRUCTURE HEALTH MONITORING BASED ON PIEZOELECTRIC IMPEDANCE TECHNOLOGY

摘要：

This paper presents an experimental study on the application of piezoelectric lead-zirconate-titanate(PZT)-based active sensing techniques for nondestructive evaluation(NDE) of civil structure. Based on the theory of the electromechanical coupling property and the interaction between piezoelectric elements and structures, the basic principle of piezoelectric impedance technology for structure health monitoring is put forward. Using steel plate with crack and bolt-jointed aluminum plate as examples, the change of impedance signatures are examined by PZT transducers. Experimental results show that the variation of the piezoelectric impedance of PZT patches which are near the crack is much larger than that far away from the crack; The increase of the size of the man-made crack obviously enlarges the variation of impedance detected; Bolts loosening has much more influence on the impedance of PZT patches nearby than those far away.

作者: Jian Gao Xing Shen Jinhao Qiu

作者单位: The Key Lab for Smart Materials & Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

会议类型: 国际会议

会议名称: The Second International Conference on Smart Materials & Structures in Aerospace Engineering(第二届航空宇航智能材料与结构国际研讨会)

会议地点: 南京

会议语种:英文

页码: 304-309

在线出版日期: 2006-09-24（万方平台首次上网日期，不代表论文的发表时间）