Input-Independent Energy Harvesting in Bistable Lattices from Transition Waves

Scientific Reports
Myungwon Hwang, Andres F Arrieta

Abstract

We demonstrate the utilisation of transition waves for realising input-invariant, frequency-independent energy harvesting in 1D lattices of bistable elements. We propose a metamaterial-inspired design with an integrated electromechanical transduction mechanism to the unit cell, rendering the power conversion capability an intrinsic property of the lattice. Moreover, focusing of transmitted energy to desired locations is demonstrated numerically and experimentally by introducing engineered defects in the form of perturbation in mass or inter-element forcing. We achieve further localisation of energy and numerically observe a breather-like mode for the first time in this type of lattice, improving the harvesting performance by an order of magnitude. Our approach considers generic bistable unit cells and thus provides a universal mechanism to harvest energy and realise metamaterials effectively behaving as a capacitor and power delivery system.

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Citations

Oct 12, 2019·Nature Communications·Martin BrandenbourgerCorentin Coulais
Aug 20, 2019·Proceedings. Mathematical, Physical, and Engineering Sciences·Alexander P BrowningMatthew J Simpson
Mar 6, 2021·Physical Review Letters·Myungwon Hwang, Andres F Arrieta

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