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Smart EMI monitoring of thin composite structures

Selva, Pierre and Cherrier, Olivier and Budinger, Valerie and Lachaud, Frédéric and Morlier, Joseph Smart EMI monitoring of thin composite structures. (2011) In: 16th International Conference on Composite Structures (ICCS16), 28-30 June 2011, Porto, Portugal .

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Abstract

This paper presents a structural health monitoring (SHM) method for in-situ damage detection and localization in carbon fibre reinforced plates (CFRP). The detection is achieved using the electromechanical impedance (EMI) technique employing piezoelectric transducers as high-frequency modal sensors. Numerical simulations based on the finite element method are carried out so as to simulate more than a hundred damage scenarios. Damage metrics are then used to quantify and detect changes between the electromechanical impedance spectrum of a pristine and damaged structure. The localization process relies on artificial neural networks (ANN) whose inputs are derived from a principal component analysis of the damage metrics. It is shown that the resulting ANN can be used as a tool to predict the in-plane position of a single damage in a laminated composite plate.

Item Type:Conference or Workshop Item (Other)
Audience (conference):International conference proceedings
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Institution: Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
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Deposited By:Joseph Morlier

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