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- W2008451036 abstract "The feasibility of an integrated system for permanent detection and estimation of damaging impacts on composite plates has been evaluated. This system is based on the existence, during a damaging impact, of an intense acoustic emission in the high frequency range. This acoustic emission is registered by a network of piezoelectric sensors and is used to obtain estimations of the location of damaging impacts and estimations of damage areas. Experiments have been carried out with carbon-epoxy plates equipped with four small and thin disc-shaped piezoelectric sensors. Each plate has been impacted using a weight drop machine equipped with a Boeing window. The impact energy varies from 2 J to 6 J for 16 plies coupons and from 4 J to 8 J for 32 plies coupons. The procedure used to identify the damage as a noise source from the signals received by the sensors allows to localize them with an accuracy of a few centimeters. It is also possible to obtain a nearly linear relation between the amplitude of the identified noise source and the projected area of the damage. It is then possible to estimate the damage area in a plate from the amplitude of the noise source after a calibration of the sensors of a reference plate." @default.
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- W2008451036 date "2000-08-24" @default.
- W2008451036 modified "2023-10-15" @default.
- W2008451036 title "<title>Piezoelectric transducer network for dual-mode (active/passive) detection, localization, and evaluation of impact damages in carbon/epoxy composite plates</title>" @default.
- W2008451036 doi "https://doi.org/10.1117/12.396391" @default.
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