Inspection of composite materials by laser-ultrasonics

Abstract : In this paper, we describe a system that has been developed, which comprises a high power short pulse laser for ultrasound generation, a long pulse receiving laser for ultrasound detection, a demodulating interferometer, an optical scanner and a data analysis system for data acquisition and processing. Following many tests performed on composite parts in the laboratory, we present demonstration tests performed with this system on a CF-18 aircraft in a maintenance hangar. These tests show that the technology is now sufficiently advanced to be readily applicable to the inspection of detached components following manufacturing and for the in-service inspection of aircrafts. Recents developments of quantitative models which describe the generation of ultrasound in composite materials are outlined, as well as on-going improvements to the detection sensor.
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Submitted on : Thursday, March 17, 2016 - 11:54:54 PM
Last modification on : Monday, March 19, 2018 - 10:38:02 PM

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  • HAL Id : hal-01290236, version 1

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Jean-Pierre Monchalin, C. Néron, G. Vaudreuil, Alain Blouin, D. Drolet, et al.. Inspection of composite materials by laser-ultrasonics. International Conference on Composite Materials and Energy (Enercomp 95), May 1995, Montréal, Canada. Proceedings of the International Conference on Composite Materials and Energy : Enercomp 95, May 8-10, 1995, Montreal Bonaventure Hilton, Montreal, Quebec, Canada. 〈hal-01290236〉

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