Programmable Metacomposite for controlling noise and vibrations

Abstract: 

Research activities in smart materials and adaptive structures are of a great interest for many years. New technologies are now available for implementing smart cells inside architected material allowing us to design and construct a new class of smart materials that we can call “programmable metacomposites”. These new generalized composites allow integration of dense and distributed set of smart materials, electronics, chip sets and power supply system inside material, for implementing distributed control strategies. This paves the way to imagine new strategies to control vibroacoustic flow in a large frequency band and implement unconventional behavior such as non-reciprocal wave propagation.

After a short state of art, the wave diffusion control by means of piezoelectric metacomposites is firstly presented and analysed. Concepts of energy lensing are also presented. On a second step one deeply presents acoustical wave reciprocity breaking by means of electroacoustic meta-liner. Implementation and industrial applications of an acoustical diode prototype allows to show all the potential of such new technologies. We will end by presenting non-linear acoustic metasurface and its potential for reaching a new class of distributed vibroacoustic programmable behaviors.

Key Words: Non-reciprocity, waves, Metacomposite, adaptive vibroacoustic, impedance optimization

Le mardi 6 mai 2025 à 11h00 / Amphithéâtre François Canac, LMA

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