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Comportement mécanique et caractérisation par implant piézoélectrique ultrasonore intégré d'un matériau composite

Abstract : The increasing demands to improve the performance of aerospace and other engineering Systems require a new class of structures, such as smart structures. These can be defined as the system that has built-in capability or with intrinsic sensors that perceive and process the operating environments, and take effective action to fulfil the intended mission. The future of smart structure technology is very promising. There has been considerable interest in the use of piezoelectric materials in conjunction with the light-weight and high-strength/modulus polymeric composites as one type of smart structures. This work presents a health monitoring study of composites incorporating an integrated piezoelectric sensor. Firstly, experimental research is focused on examining the effects of the embedded sensors on the structural integrity of composites subjected to tensile and 3-point bending loads. A series of specimen composites (laminated composites and sandwich) with and without embedded piezoelectric sensors were fabricated. The composite specimens with PZT sensors embedded in the mid-plane were tested in static, fatigue and creep loading while continuously monitoring the response by the acoustic emission technique. The acoustic signals were analysed using the classification k-means methoc in order to identify the different damage and to follow the evolution of these various mechanisms for both types of materials (with and without sensor).
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  • HAL Id : tel-00955508, version 1

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Sahir Masmoudi. Comportement mécanique et caractérisation par implant piézoélectrique ultrasonore intégré d'un matériau composite. Autre [cond-mat.other]. Université du Maine, 2013. Français. ⟨NNT : 2013LEMA1023⟩. ⟨tel-00955508⟩

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