Recent Advances in Piezoelectric Wafer Active Sensors for Structural Health Monitoring Applications

Sensors

Victor Giurgiutiu¹  Hanfei Mei¹  Asaad Migot¹  MohammadFaisal Haider¹  Roshan Joseph¹ 

[1] Department of Mechanical Engineering, University of South Carolina, 300 Main Street, Columbia, SC 29208, USA;

关键词: structural health monitoring;    piezoelectric wafer active sensors;    active sensing;    passive sensing;    damage detection;    acoustic emission;   

DOI  :  10.3390/s19020383

来源: DOAJ

【 摘 要 】

In this paper, some recent piezoelectric wafer active sensors (PWAS) progress achieved in our laboratory for active materials and smart structures (LAMSS) at the University of South Carolina: http: //www.me.sc.edu/research/lamss/ group is presented. First, the characterization of the PWAS materials shows that no significant change in the microstructure after exposure to high temperature and nuclear radiation, and the PWAS transducer can be used in harsh environments for structural health monitoring (SHM) applications. Next, PWAS active sensing of various damage types in aluminum and composite structures are explored. PWAS transducers can successfully detect the simulated crack and corrosion damage in aluminum plates through the wavefield analysis, and the simulated delamination damage in composite plates through the damage imaging method. Finally, the novel use of PWAS transducers as acoustic emission (AE) sensors for in situ AE detection during fatigue crack growth is presented. The time of arrival of AE signals at multiple PWAS transducers confirms that the AE signals are originating from the crack, and that the amplitude decay due to geometric spreading is observed.

【 授权许可】

Unknown