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31 March 1998 Nondestructive evaluation of fatigue changes of composite structure by laser-excited ultrasonic waves
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Abstract
Wide-band acoustic spectroscopy with laser excitation of ultrasound was carried out for glass-fiber-reinforced composite samples. Attenuation coefficient of ultrasonic waves in these samples was measured in the frequency range 1 divided by 20 MHz. Resonant peaks of ultrasound attenuation were found for green-state composite samples caused by periodic structure of composite. Transformation of ultrasound attenuation spectra was observed for samples after service life testing because of fatigue changes of composite structure.
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Alexander A. Karabutov and Natalia B. Podymova "Nondestructive evaluation of fatigue changes of composite structure by laser-excited ultrasonic waves", Proc. SPIE 3396, Nondestructive Evaluation of Materials and Composites II, (31 March 1998); https://doi.org/10.1117/12.301515
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