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Failure Identification Methodology for Woven Composites Incorporating Sensor Degradation

[+] Author Affiliations
James Pearson, Mohanraj Prabhugoud, Mohammed Zikry, Kara Peters

North Carolina State University

Paper No. IMECE2004-61802, pp. 31-40; 10 pages
doi:10.1115/IMECE2004-61802
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Materials
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Materials Division
  • ISBN: 0-7918-4712-8 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

The long-term goal of this project is the development of embedded, optimally distributed, multi-scale sensing methodologies that can be integrated into material systems for failure identification in structural systems. The coupling of sensor data fusion with a three-dimensional predictive framework will provide insight and understanding of events that are difficult, if not impossible, in any experimental study, such as subsurface damage and crack nucleation in structural systems. The current work presents an experimental study of the survivability and degradation behavior of an optical fiber Bragg grating sensor, surface mounted on a woven fiber composite material system during multiple low velocity impacts. The results reveal that as sensor degradation occurs, additional coupling phenomena other than Bragg reflection are observed in the grating sensor. From these additional modes, information on the sensor/host bond and fiber degradation is obtained.

Copyright © 2004 by ASME

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