Enhanced Energy Harvesting of Flexural Waves in Elastic Beams by Bending Mode of Graded Resonators

Ponti, Jacopo Maria De; Iorio, Luca; Riva, Emanuele; Braghin, Francesco; Corigliano, Alberto; Ardito, Raffaele

doi:10.3389/fmats.2021.745141

Cited by 25 publications

(15 citation statements)

References 47 publications

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“…Although the literature on the mechanisms for wave manipulation using PCs and acoustic MMs is vast, including examples of wave conversion (Chaplain et al, 2020;De Ponti et al, 2021), scattering (Yang et al, 2016;Cao et al, 2021), cloaking (Farhat et al, 2008;, and topological effects (Mousavi et al, 2015;Foehr et al, 2018), the literature on bioinspired structures concerning their dynamic properties, and in special, wave manipulation and the effects of viscoelasticity, which are certainly relevant for biological structures, is considerably more restrict. Thus, in the next section, a literature review is presented on different bioinspired PCs and acoustic MMs.…”

Section: Local Resonance and Twodimensional Mmsmentioning

confidence: 99%

Bioinspired acoustic metamaterials: From natural designs to optimized structures

Poggetto

2023

Front. Mater.

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Artificial structures known as phononic crystals and acoustic metamaterials can be designed by spatially arranging one or more materials to obtain desired wave manipulation characteristics. The combination of various materials in complex composites is also a common feature of biological systems, which have been shaped in the course of evolution to achieve excellent properties in various requisites, both static and dynamic, thus suggesting that bioinspired concepts may present useful opportunities to design artificial systems with superior dynamic properties. In this work, a set of biological systems (nacre composites, spider webs, fractals, cochlear structures, and moth wings) and corresponding bioinspired metamaterials are presented, highlighting their main features and applications. Although the literature on some systems is vast (e.g., fractals), spanning multiple length scales for both structural and acoustic applications, much work remains to be explored concerning other biological structures (e.g., moth wings). Especially, bioinspired systems achieved by considering diverse objectives seem to be a promising yet relatively unexplored field of research.

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Section: Local Resonance and Twodimensional Mmsmentioning

confidence: 99%

Bioinspired acoustic metamaterials: From natural designs to optimized structures

Poggetto

2023

Front. Mater.

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“…The two piezoelectric patches of one pair of parasitic beams are connected in series. Because the base excitation is symmetric, the antisymmetric modes of the pair of parasitic beams is not excited [33]. This means each pair is free from out-of-phase vibration and charge cancellation.…”

Section: Setupmentioning

confidence: 99%

“…Building on the seminal results contained in a series of three articles recently published by De Ponti et al [31,32,33], we re-engineer and optimise a graded metamaterial-based energy harvester. For conciseness, this is referred to as "graded-harvester" hereafter.…”

Section: Introductionmentioning

confidence: 99%

A Graded Metamaterial for Broadband and High-capability Piezoelectric Energy Harvesting

Zhao,

Thomsen,

De Ponti

et al. 2022

Preprint

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This work studies a broadband graded metamaterial, which integrates the piezoelectric energy harvesting function targeting low-frequency structural vibrations, lying below 100 Hz. The device combines a graded metamaterial with beam-like resonators, piezoelectric patches and a self-powered piezoelectric interface circuit for energy harvesting. Based on the mechanical and electrical lumped parameters, an integrated model is proposed to investigate the power performance of the proposed design. Thorough numerical simulations were conducted to analyse the spatial frequency separation capacity and the slow-wave phenomenon of the graded metamaterial for broadband and high-capability piezoelectric energy harvesting. Experiments with realistic vibration sources show that the harvested power of the proposed design yields a five-fold increase with respect to conventional harvesting solutions based on single cantilever harvesters. Our results reveal the significant potential on exploitation of graded metamaterials for energy-efficient vibration-powered devices.

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“…The underlying physics, capable of inducing spatial segregation of frequency components, relies on the ability to locally decrease the propagation speed along the array. Such graded line arrays of resonators have been theorised, designed and manufactured also for energy harvesting applications , De Ponti et al 2021, De Ponti et al, 2022. Inspired by the advanced performances of chiral lattice materials (Bacigalupo et al, 2016, Bacigalupo et al, 2017, Bacigalupo et al, 2019 for elastic wave control and auxetic properties, we decide to combine chirality with local resonance.…”

Section: Introductionmentioning

confidence: 99%

Resonant meta-lattices for wave confinement and energy harvesting

iorio¹,

Ponti²,

Ardito³

et al. 2022

Proceedings of the 8th International Symposium on Solid Mechanics

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Precise control of elastic waves is a challenge for many applications in the field of mechanical vibrations, ultrasonic inspection, and energy harvesting. Inspired by the advanced wave manipulation performances of elastic substrates with resonators, we design an elastic meta-lattice with local resonators capable of redirecting and confining elastic energy. The proposed structure is made of square unit cells with a chiral structure, and local resonators at the corners. The interplay between chirality and local resonance allows to redirect elastic waves within the unit cell, amplifying the wavefield in the resonators. By implementing piezoelectric coupling in the resonators, the meta-lattice can be tailored for energy harvesting applications, minimising energy losses due to wave scattering.

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Enhanced Energy Harvesting of Flexural Waves in Elastic Beams by Bending Mode of Graded Resonators

Cited by 25 publications

References 47 publications

Bioinspired acoustic metamaterials: From natural designs to optimized structures

Bioinspired acoustic metamaterials: From natural designs to optimized structures

A Graded Metamaterial for Broadband and High-capability Piezoelectric Energy Harvesting

Resonant meta-lattices for wave confinement and energy harvesting

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