FIBERS-BASED COMPOSITE STRUCTURES WITH INTEGRATED PIEZO-CERAMICS
Résumé
Currently, in different industrial fields as transport or aerospace, a research effort is lead concerning
structural weight reduction. One of the most promising solutions is the use of composite
structures and, in particular, the fibers-based composite structures. In the same time, there is
an intensification of the operational dynamic environment and an increase of durability requirements.
One way to manage this point is to design and manufacture adaptive composite
structures. To integrate new functionalities inside mechanical structures, it is necessary to develop
a real fully distributed set of transducers and to include them at the heart of composite
materials that is to say during the manufacturing process.
In this paper, a design approach based on engineering system theory is developed for fibersbased
composite structures including several piezoceramic transducers, electrically independent.
These structures are manufactured in our laboratory. Several characterization needs are
identified so as to well-design these complex structures. An experimental non-destructive procedure
based on the analysis of anti-resonance and resonance frequencies of the transducers is
proposed for determining the initial material coefficients of interest. Moreover, an experimental
process is identified to obtain the global mechanical parameters of the fibers-based composites
we produced.