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Application of laser-ultrasonics to the inspection of composite materials

Abstract : In this paper, we describe a laser-ultrasonics system that comprises a high power short pulse laser for ultrasound generation by thermoelastic effect, a long pulse receiving laser for detecting ultrasound off the surface, an optical scanner and a data analysis system for data acquisition and processing. The application of the technique to the inspection of large area panels and contoured specimens is illustrated by two examples. Several recent developments aimed at understanding more quantitatively the generation aspect in composite materials and at modeling the whole generation and flaw detection process are also presented. The technology appears quite suitable and sufficiently advanced to be applicable to the inspection of detached components following manufacturing and for the in-service inspection of aircraft.
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Submitted on : Friday, March 18, 2016 - 4:47:27 PM
Last modification on : Friday, June 5, 2020 - 11:06:02 PM

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  • HAL Id : hal-01290241, version 1

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Jean-Pierre Monchalin, Marc Choquet, R. Héon, P. Bouchard, C. Padioleau, et al.. Application of laser-ultrasonics to the inspection of composite materials. CANCOM'93 2nd Canadian International Composites Conference and Exhibition, Sep 1993, Ottawa, Canada. ⟨hal-01290241⟩

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