14 September 1994 Microwave detection of defects in glass-reinforced polymer composites
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The potential of microwaves for defect and flaw detection in glass reinforced polymer composites is investigated. Specially fabricated thick glass reinforced polymer composite samples with several types of embedded defects are used for these measurements. An open- ended rectangular waveguide is utilized as a sensor. Microwave images were created by scanning the samples. These images demonstrate the ability of microwaves for detecting and locating defects and voids of different sizes and shapes in such reinforced plastic composites. The standoff distance and the frequency are studied as a means of increasing detection sensitivity. Comparative measurements illustrate the superiority of this technique over other nondestructive inspection (NDI) methods used on some samples.
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Stoyan I. Ganchev, Stoyan I. Ganchev, Gary W. Carriveau, Gary W. Carriveau, Nasser Qaddoumi, Nasser Qaddoumi, } "Microwave detection of defects in glass-reinforced polymer composites", Proc. SPIE 2275, Advanced Microwave and Millimeter-Wave Detectors, (14 September 1994); doi: 10.1117/12.186712; https://doi.org/10.1117/12.186712

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