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Proceedings Paper

Damage and damaging impact monitoring by PZT sensor-based HUMS
Author(s): Daniel L. Osmont; Marc Dupont; Remi Gouyon; Michel B. Lemistre; Daniel L. Balageas
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Paper Abstract

The feasibility of an integrated system for permanent detection of damaging impacts on composite structures has been evaluated. This system is based on the existence, during the damaging impact, of an intense acoustic emission in the high frequency range. This acoustic emission is registered by a network of piezoelectric sensors. Experiments are carried out with carbon-epoxy plates equipped with four miniaturized disc- shaped piezoelectric sensors. Both fully embedded and surface positioned sensors are used. Each plate is impacted using a weight drop machine equipped with a Boeing window. The impact energy varies from 2 J to 6 J for 16 ply coupons and from 4 J to 8 J for 32 ply coupons. The procedure used to identify the damaged area as a noise source from the signals received by the sensors allows localizing them with an accuracy of a few centimeters. It also allows to correlate the <<amplitude>> of the identified noise source to the area of the damage. It is then possible to estimate the damaged area from the amplitude of the noise source.

Paper Details

Date Published: 12 June 2000
PDF: 8 pages
Proc. SPIE 3986, Smart Structures and Materials 2000: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (12 June 2000); doi: 10.1117/12.388095
Show Author Affiliations
Daniel L. Osmont, ONERA (France)
Marc Dupont, ONERA (France)
Remi Gouyon, ONERA (France)
Michel B. Lemistre, ONERA (France)
Daniel L. Balageas, ONERA (France)


Published in SPIE Proceedings Vol. 3986:
Smart Structures and Materials 2000: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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