Design and optimization of variable stiffness piezoelectric energy harvesters

Cao, Yajun; Huang, Huaxiong

doi:10.1016/j.compstruct.2022.115204

Cited by 5 publications

(2 citation statements)

References 57 publications

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“…This growing demand has prompted researchers to delve into the creation of energy harvesting technologies. Consequently, a  Corresponding Author: Amin-farrokh@modares.ac.ir substantial portion of these endeavors has been directed towards vibrational energy extraction employing piezoelectric materials, chosen for their advantageous frequency response and remarkable efficiency [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: -Introductionmentioning

confidence: 99%

Investigating the Impact of Substrate Defects on the Operational Performance of a Silicon-Substrate Bimorph Piezoelectric Energy Harvester

Jamshiddoust,

Karamooz,

Farrokhabadi

2024

Preprint

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Cracks are prevalent defects found in micro-electromechanical systems, influencing both the operational dynamics and performance of these structures. These cracks have the potential to alter the stiffness of the structure and impact various parameters such as resonance frequency, voltage, and output power. This transformation may eventually result in structural failure over a defined period. Hence, it is imperative to diagnose and detect structural cracks. In this study, we introduce a semi-analytical method to examine transverse cracks occurring within the mid-layer of a bimorph piezoelectric energy harvester. The investigation encompasses reductions in stiffness and variations in capacitance resulting from mid-layer transverse cracks. From a microscale perspective, we employ a stress transfer technique based on crack density to quantify stiffness reduction caused by mid-layer cracks. Analytical outcomes concerning the influence of cracks in the mid-layer of the bimorph are obtained using assumptions derived from the Euler-Bernoulli beam theory and substantiated through finite element analysis. The consequences of these imperfections on mechanical parameters such as resonance frequency, as well as electrical parameters like output electrical power, are deliberated upon. It is observed that the existence of cracks in the mid-layer of the bimorph piezoelectric energy harvester leads to a decline in its resonance frequency, accompanied by an increase in voltage and output power, indicative of impending device malfunction. This research facilitates the identification of defects in MEMS by monitoring the harvester's operational performance.

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Section: -Introductionmentioning

confidence: 99%

Investigating the Impact of Substrate Defects on the Operational Performance of a Silicon-Substrate Bimorph Piezoelectric Energy Harvester

Jamshiddoust,

Karamooz,

Farrokhabadi

2024

Preprint

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“…de Almeida (2019) obtained the optimum parameters of laminated composite structures like square plate and shallow shell structure, using harmony search optimization scheme. Cao and Huang (2022) presented optimization of variable stiffness curvilinear fiber energy harvester using iso-geometric topology optimization to obtain the fiber orientation and topology. Muthalif et al (2021) performed an optimization technique in the context of energy harvesting with seven piezoelectric patch shapes attached with a simply supported laminated composite plate by varying fiber orientations.…”

Section: Introductionmentioning

confidence: 99%

Electro-structural modeling of smart laminated composite plate under hygrothermal environment for optimum vibration energy harvesting

Panda

Srinivas

2023

Journal of Intelligent Material Systems and Structures

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Smart laminated composite structures with piezoelectric patches are widely used in vibration control applications in several engineering fields. Precise mathematical models are required for the coupling of base structural and piezoelectric field variables. This paper presents the electro-structural analysis and optimization studies of piezoelectric energy harvester with laminated composite substrate plate subjected to base excitations. The coupled electro-mechanical equations are derived from recently proposed first-order shear deformation theory via the Hamilton’s principle by considering hygrothermal effects. The coupled-field solution is obtained from Ritz-approximation and validated with three-dimensional finite element analysis. Effects of multiple piezoelectric patch topologies over the plate surface on the open-circuit voltage and displacement response are illustrated. Furthermore, the influences of piezoelectric-patch sizes, ply-orientation, size, and location of the tip mass are initially studied on the magnitude of output power and efficiency. An optimization study is conducted to identify the geometric and material variables for improvement of the harvester power output and efficiency.

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Electromagnetic vibrational harvester based on U-shaped ferromagnetic cantilever: A novel two-magnet configuration

Gandia,

Garaio,

Beato-López

et al. 2024

Energy Conversion and Management: X

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Design and optimization of variable stiffness piezoelectric energy harvesters

Cited by 5 publications

References 57 publications

Investigating the Impact of Substrate Defects on the Operational Performance of a Silicon-Substrate Bimorph Piezoelectric Energy Harvester

Investigating the Impact of Substrate Defects on the Operational Performance of a Silicon-Substrate Bimorph Piezoelectric Energy Harvester

Electro-structural modeling of smart laminated composite plate under hygrothermal environment for optimum vibration energy harvesting

Electromagnetic vibrational harvester based on U-shaped ferromagnetic cantilever: A novel two-magnet configuration

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