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Predictive Simulation in Structural Health Monitoring With Piezoelectric Wafer Active Sensors for Risk-Informed In-Service Inspection

[+] Author Affiliations
Victor Giurgiutiu

University of South Carolina, Columbia, SC

Paper No. PVP2011-57358, pp. 965-972; 8 pages
doi:10.1115/PVP2011-57358
From:
  • ASME 2011 Pressure Vessels and Piping Conference
  • Volume 6: Materials and Fabrication, Parts A and B
  • Baltimore, Maryland, USA, July 17–21, 2011
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4456-4
  • Copyright © 2011 by ASME

abstract

Piezoelectric wafer active sensors (PWAS) are lightweight and inexpensive enablers for a large class of structural health monitoring (SHM) applications. The presentation will start with a brief review of PWAS physical principles and basic modeling. Then, the presentation will consider the several ways in which PWAS can be used for damage detection: (a) embedded guided-wave ultrasonics, i.e., pitch-catch, pulse-echo, phased arrays, thickness mode; (b) high-frequency modal sensing, i.e., the electro-mechanical (E/M) impedance method; (c) passive detection, i.e., acoustic emission and impact detection. Emphasis will be placed on recent developments. Special attention will be given to the mechatronics predictive modeling of the complete cycle from electrical excitation through piezoelectric transduction, ultrasonic acoustic waves, and finally reverse piezoelectric transduction to generate the received electric signal. Power and energy aspects of this process will be considered and discussed. The presentation will end with conclusions and suggestions for further work.

Copyright © 2011 by ASME

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