9 June 2006 Laser optoacoustic method for nondestructive porosity evaluation of graphite-epoxy composites
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Proceedings Volume 6162, International Conference on Lasers, Applications, and Technologies 2005: Laser Sensing, Imaging, and Information Technologies; 61620I (2006) https://doi.org/10.1117/12.674997
Event: International Conference on Lasers, Applications, and Technologies 2005, 2005, St. Petersburg, Russian Federation
Abstract
The laser ultrasonic method for nondestructive quantitative local evaluation of graphite-epoxy composites porosity is developed with only one surface of a sample or a product is available. The excitation and the registration of ultrasonic transients is carried out with the specially designed opto-acoustic transducer, which allows one to obtain both a temporal profile and a frequency spectrum of backscattered opto-acoustic signals. The empirical dependence of the volume content of pores (porosity) of a composite vs. the noise component power of a backscattered transient is obtained in the range of porosity of (0÷0,15). The experimental results prove the possibility to employ the laser opto-acoustic method for porosity evaluation of composite materials and products both during manufacturing and operation.
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A. A. Karabutov, I. M. Pelivanov, N. B. Podymova, "Laser optoacoustic method for nondestructive porosity evaluation of graphite-epoxy composites", Proc. SPIE 6162, International Conference on Lasers, Applications, and Technologies 2005: Laser Sensing, Imaging, and Information Technologies, 61620I (9 June 2006); doi: 10.1117/12.674997; https://doi.org/10.1117/12.674997
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