We experimentally demonstrate that a rainbow-based metamaterial, created by a graded array of resonant rods attached to an elastic beam, operates as a mechanical delay-line by slowing down surface elastic waves to take advantage of wave interaction with resonance. Experiments demonstrate that the rainbow effect reduces the amplitude of the propagating wave in the host structure. At the same time, it dramatically increases both the period of interaction between the waves and the resonators and the wavefield amplitude in the rod endowed with the harvester. Increased energy is thus fed into the resonators over time: we show the enhanced energy harvesting capabilities of this system.
Experimental investigation of amplification, via a mechanical delay-line, in a rainbow-based metamaterial for energy harvesting
De Ponti, J. M.;Riva, E.;Ardito, R.;Braghin, F.;Corigliano, A.;
2020-01-01
Abstract
We experimentally demonstrate that a rainbow-based metamaterial, created by a graded array of resonant rods attached to an elastic beam, operates as a mechanical delay-line by slowing down surface elastic waves to take advantage of wave interaction with resonance. Experiments demonstrate that the rainbow effect reduces the amplitude of the propagating wave in the host structure. At the same time, it dramatically increases both the period of interaction between the waves and the resonators and the wavefield amplitude in the rod endowed with the harvester. Increased energy is thus fed into the resonators over time: we show the enhanced energy harvesting capabilities of this system.File | Dimensione | Formato | |
---|---|---|---|
5.0023544.pdf
accesso aperto
Descrizione: Articolo principale
:
Publisher’s version
Dimensione
2.87 MB
Formato
Adobe PDF
|
2.87 MB | Adobe PDF | Visualizza/Apri |
supplementarymaterial.pdf
accesso aperto
Descrizione: Materiale supplementare
:
Publisher’s version
Dimensione
10.63 MB
Formato
Adobe PDF
|
10.63 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.