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Proceedings Paper

NDE of composites via quadrupole resonance spectroscopy
Author(s): Stephanie A. Vierkoetter; Catherine R. Ward; David M. Gregory; Suresh M. Menon; Dennis P. Roach
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Paper Abstract

Quadrupole Resonance (QR) has recently been shown to be a feasible method for the non-contact measurement of strain in polymeric fiberglass-reinforced composites. Tiny crystals of a QR active additive are embedded into the composite or are applied as part of a surface coating. Strains in the composite are transferred to the additive crystals. These crystals can be interrogated via radio frequency pulses provided by a single-sided radio frequency coil. Thus, the additive crystals give rise to a strain dependent QR frequency response. The QR frequency and line width from composites containing additive are found to be sensitive parameters for the measurement of tensile strain. The QR active additive that was embedded in the composite matrix was found to be inert and non-intrusive.

Paper Details

Date Published: 1 August 2003
PDF: 9 pages
Proc. SPIE 5046, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites II, (1 August 2003); doi: 10.1117/12.484298
Show Author Affiliations
Stephanie A. Vierkoetter, Quantum Magnetics, Inc. (United States)
Catherine R. Ward, Quantum Magnetics, Inc. (United States)
David M. Gregory, Quantum Magnetics, Inc. (United States)
Suresh M. Menon, Menon & Associates, Inc. (United States)
Dennis P. Roach, Sandia National Labs. (United States)


Published in SPIE Proceedings Vol. 5046:
Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites II
Andrew L. Gyekenyesi; Peter J. Shull, Editor(s)

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