Article Dans Une Revue Journal of the Acoustical Society of America Année : 2022

Soft elastomers: a playground for guided waves

Résumé

Mechanical waves propagating in soft materials play an important role in physiology. They can be natural, such as the cochlear wave in the inner ear of mammalians, or controlled, such as in elastography in the context of medical imaging. In a recent study, Lanoy, Lemoult, Eddi, and Prada [Proc. Natl. Acad. Sci. U.S.A. 117(48), 30186–30190 (2020)] implemented an experimental tabletop platform that allows direct observation of in-plane guided waves in a soft strip. Here, a detailed description of the setup and signal processing steps is presented as well as the theoretical framework supporting them. One motivation is to propose a tutorial experiment for visualizing the propagation of guided elastic waves. Last, the versatility of the experimental platform is exploited to illustrate experimentally original features of wave physics, such as backward modes, stationary modes, and Dirac cones.
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Dates et versions

hal-03864234 , version 1 (21-11-2022)

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Alexandre Delory, Fabrice Lemoult, Maxime Lanoy, Antonin Eddi, Claire Prada. Soft elastomers: a playground for guided waves. Journal of the Acoustical Society of America, 2022, 151 (5), pp.3343-3358. ⟨10.1121/10.0011391⟩. ⟨hal-03864234⟩
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