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Degradation of Sensor Systems in Multifunctional Composites

[+] Author Affiliations
Mohammad Mehdizadeh, Sabu John, Chun Wang

RMIT University, Bundoora, VIC, Australia

Michael Bannister

CRC–Advanced Composite Structures, Fishermans Bend, VIC, Australia

Viktor Verijenko

Defense Material and Technology Centre (DMTC) Ltd., Hawthorn, VIC, Australia

Paper No. SMASIS2010-3697, pp. 115-124; 10 pages
doi:10.1115/SMASIS2010-3697
From:
  • ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1
  • Philadelphia, Pennsylvania, USA, September 28–October 1, 2010
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-4415-1 | eISBN: 978-0-7918-3886-0
  • Copyright © 2010 by ASME

abstract

Structural health monitoring (SHM) systems are increasingly being considered for implementation in aerospace structures. As the application of SHM systems increase, it will be important to define standardized procedures to test durability, reliability, and longevity of the systems. The work presented in this paper is some preliminary work on the integrity of Piezoelectric sensors itself when used to monitor the strains in structures. This study involved the measurements of pertinent electrical properties of these sensors over 100,000 cycles of fatigue loading. Marked changes in the capacitance and inductance of these sensors highlighted deleterious structural changes in the sensor itself without any discernible change in the structure it is supposed to monitor. This might have significant implications in the reliability assessment of sensory data from SHM systems.

Copyright © 2010 by ASME

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