Recent Advances in Piezoelectric Wafer Active Sensors for Structural Health Monitoring Applications
- Univ. of South Carolina, Columbia, SC (United States); DOE/OSTI
- Univ. of South Carolina, Columbia, SC (United States)
- Univ. of South Carolina, Columbia, SC (United States); Thi-Qar Univ., Nasiriyah (Iraq)
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.
- Research Organization:
- Univ. of Mississippi, Oxford, MS (United States); Univ. of South Carolina, Columbia, SC (United States)
- Sponsoring Organization:
- National Aeronautics and Space Administration (NASA); US Air Force Office of Scientific Research (AFOSR); US Department of the Navy, Office of Naval Research (ONR); USDOE Office of Nuclear Energy (NE)
- Grant/Contract Number:
- NE0000726; NE0008400
- OSTI ID:
- 1613847
- Journal Information:
- Sensors, Journal Name: Sensors Journal Issue: 2 Vol. 19; ISSN SENSC9; ISSN 1424-8220
- Publisher:
- MDPI AGCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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