Shape optimization of piezoelectric energy harvesters of variable thickness

Hurtado, A. Calderon; Peralta, Patricio; Ruiz, Rafael O.; Alamdari, Mehrisadat Makki; Atroshchenko, Elena

doi:10.1016/j.jsv.2021.116503

Cited by 11 publications

(2 citation statements)

References 35 publications

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“…The thickness of the substrate [40], unit-cell numbers [22,24], and cross-section properties [21] have been identified as key parameters of PEH. Here, with reference to the FEM analysis, we discussed the influence of these parameters on the output power of AS PEH to optimize its structure.…”

Section: Discussionmentioning

confidence: 99%

Multimode auxetic piezoelectric energy harvester for low-frequency vibration

He,

Kurita,

Narita

2024

Smart Mater. Struct.

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Herein, we propose a piezoelectric energy harvester (PEH) capable of vibrating in multi-degrees-of-freedom. The resonant frequency, working bandwidth, and output power of the PEH were improved by introducing an auxetic structure (AS). The proposed PEH exhibited a symmetric serpentine structure with a doubly clamped configuration comprising several proof masses at the junctions. Finite element method simulation was conducted to investigate the characteristics of an AS PEH and a plain-structure PEH. Prototypes of the PEHs were manufactured by three-dimensional printing technology, and their performance was evaluated through vibrational energy-harvesting experimental tests. The results showed that introducing the AS reduced the first and second resonant frequencies by 49% and 44%, respectively, considerably improved the output power in the first mode (up to 2548%) and narrowed the frequency bandgap between the first two resonance modes by 29%. The proposed multimode AS PEH can operate in a low-frequency environment of less than 20 Hz. Finally, we discussed several ways of optimizing the AS. It has been found that the PEH performance could be further improved by selecting a reasonable thickness for the AS, increasing the number of periodic unit cells, and using an AS with a variable cross-section unit cell.

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Section: Discussionmentioning

confidence: 99%

Multimode auxetic piezoelectric energy harvester for low-frequency vibration

He,

Kurita,

Narita

2024

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…This study originates this boundary condition fundamentally, and since this paper's focus is introducing this new boundary design, it studies a standard rectangular piezoelectric case study for sensitivity analysis. Nonetheless, the present fundamental idea can be applied to advanced piezoelectric materials (such as functionally graded piezoelectric [17] and piezocomposite materials [18]) and configurations (such as non-uniform [19], variable thickness [20], and hybrid piezo-magnetic harvesters) for complex and high-performance energy conversion systems. Analytical modeling of the PEHs under the FPB condition is presented for a piezoelectric composite material.…”

Section: Introductionmentioning

confidence: 99%