title: Experimental demonstration of ordered and disordered multiresonant metamaterials for lamb waves.
abstract: We demonstrate the experimental realization of a multiresonant metamaterial for Lamb waves, i.e., elastic waves propagating in plates. The metamaterial effect comes from the resonances of long aluminum rods that are attached to an aluminum plate. Using time-dependent measurements, we experimentally prove that this metamaterial exhibits wide band gaps as well as sub- and suprawavelength modes for both a periodic and a random arrangement of the resonators. The dispersion curve inside the metamaterial is predicted through hybridizations between flexural and compressional resonances in the rods and slow and fast Lamb modes in the plate. We finally underline how the various degrees of freedom of such system paves the way to the design of metamaterials for the control of Lamb waves in unprecedented ways.
authors: Institut des Sciences de la Terre, UMR 5275, Université Joseph Fourier, 38000 Grenoble, France.
authors: Matthieu
authors: M
authors: Rupin
authors: Institut Langevin, ESPCI ParisTech and CNRS UMR 7587, PSL Research University, 1 rue Jussieu, 75005, Paris, France.
authors: Fabrice
authors: F
authors: Lemoult
authors: Institut Langevin, ESPCI ParisTech and CNRS UMR 7587, PSL Research University, 1 rue Jussieu, 75005, Paris, France.
authors: Geoffroy
authors: G
authors: Lerosey
authors: Institut des Sciences de la Terre, UMR 5275, Université Joseph Fourier, 38000 Grenoble, France.
authors: Philippe
authors: P
authors: Roux