Relation between the ultrasonic attenuation and the porosity of a RTM composite plate

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Abstract

We propose a comparative study of X-ray tomography and ultrasonic reflection methods, for determining the porosity of a composite plate realized in LOMC with an industrial process. We measure the attenuation of ultrasound propagating in the thickness by using 10 MHz plane transducer in pulse-echo mode. Comparing these results to the 2D porosity tomographic map allows establishing a relation between attenuation and porosity. A C-scan picture of the plate given by the echoes reflected by the rear surface also provides a local information on the attenuation. Furthermore, we propose a method for the mapping of the reflecting sources as the included bubbles and the interfaces resin/fibers.

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Duong, N. T., Duclos, J., Bizet, L., & Pareige, P. (2015). Relation between the ultrasonic attenuation and the porosity of a RTM composite plate. In Physics Procedia (Vol. 70, pp. 554–557). Elsevier. https://doi.org/10.1016/j.phpro.2015.08.015

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