NDE of composites via quadrupole resonance spectroscopy

Stephanie A. Vierkoetter; Catherine R. Ward; David M. Gregory; Suresh M. Menon; Dennis P. Roach

doi:10.1117/12.484298

1 August 2003 NDE of composites via quadrupole resonance spectroscopy

Stephanie A. Vierkoetter, Catherine R. Ward, David M. Gregory, Suresh M. Menon, Dennis P. Roach

Proceedings Volume 5046, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites II; (2003) https://doi.org/10.1117/12.484298
Event: NDE for Health Monitoring and Diagnostics, 2003, San Diego, California, United States

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.

Citation Download Citation

Stephanie A. Vierkoetter, Catherine R. Ward, David M. Gregory, Suresh M. Menon, and Dennis P. Roach "NDE of composites via quadrupole resonance spectroscopy", Proc. SPIE 5046, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites II, (1 August 2003); https://doi.org/10.1117/12.484298

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