Laser optoacoustic method for nondestructive porosity evaluation of graphite-epoxy composites

A. A. Karabutov; I. M. Pelivanov; N. B. Podymova

doi:10.1117/12.674997

9 June 2006 Laser optoacoustic method for nondestructive porosity evaluation of graphite-epoxy composites

A. A. Karabutov, I. M. Pelivanov, N. B. Podymova

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.

Citation Download Citation

A. A. Karabutov, I. M. Pelivanov, and 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); https://doi.org/10.1117/12.674997

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