Usefulness of inclined circular cylinders for designing ultra-wide bandwidth piezoelectric energy harvesters: Experiments and computational investigations

Wang, Junlei; Zhang, Chengyun; Yurchenko, Daniil; Abdelkefi, Abdessattar; Zhang, Mingjie; Liu, Huadong

doi:10.1016/j.energy.2021.122203

Cited by 25 publications

(7 citation statements)

References 64 publications

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“…Changes in the inclination angle of the circular cylinder with respect to incoming flow in order to broaden the effective wind speed bandwidth of the piezoelectric energy harvester were investigated by researchers. [ 37 ] Energy harvesting characteristics of the system under different inclination angles were proposed and results were supported by the experimental study. The cylinder with a certain inclination angle was obtained, which could effectively increase the torsional vibration within a certain range of the wind speed, thus resulting a high voltage output.…”

Section: Introductionmentioning

confidence: 86%

Energy Harvesting by V‐Shape Bluff Bodies with Various Apical Angles Attached to a Revolute Joint

Özkan,

Basaran,

Erkan

2023

Energy Tech

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This study parametrically investigates the efficiency of an integrated energy harvesting system that consists of a piezoelectric patch attached to a cantilever beam and V‐shape bluff bodies with various apical angles. V‐shape bluff bodies are connected to a cantilever beam with a revolute joint that represents a two degrees‐of‐freedom configuration. The mechanical energy of the galloping and fluttering motions, resulted from the vortex shedding appears downstream of the bluff bodies, is converted into electricity by means of a piezoelectric patch. The apical angle of the V‐shape geometries, varies between 0° and 180°, is the main parameter where the generated voltages and the related power curves are the major results for the evaluation of the efficiency of this harvesting system. Based on the experimental examinations, the maximum output power of 0.295 mW is produced at a wind speed of 10 m/s for the apical angle of 180° and the electrical resistance of 230 kΩ. Moreover, the proposed energy harvester system can still produce usable output power for the apical angles ranges from 0° to 20° and from 170° to 180°.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 86%

Energy Harvesting by V‐Shape Bluff Bodies with Various Apical Angles Attached to a Revolute Joint

Özkan,

Basaran,

Erkan

2023

Energy Tech

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“…The hexagonal conformation of regular honeycomb cells ensures an equitable distribution of forces throughout the structure, thereby yielding an outstanding comprehensive load-bearing capability [56]. By contrast, the inclined- [57] and staggered-square [58] configurations demonstrate superior direction-specific mechanical properties. Most notably, re-entrant auxetic honeycombs exhibit a negative Poisson’s ratio; this unique attribute denotes that these structures, when subjected to uniaxial tension, expand in the orthogonal direction, rather than exhibiting the conventional contraction.…”

Section: Parametric Analysismentioning

confidence: 99%

Equivalent in-plane elastic moduli of honeycomb materials under hypergravity conditions

Wang,

Lü

2023

Proc. R. Soc. A.

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Honeycomb materials frequently encounter hypergravity conditions in both aerospace and biological contexts during phases such as launch, reentry or under centrifugal motion. The significant body force engendered by hypergravity induces alterations in the microstructure of honeycomb materials, which in turn, influences their macroscopic mechanical behaviour. Leveraging the stiffness of the beam element as a pivotal variable, we successfully derived the equivalent moduli of the honeycomb material under hypergravity conditions. We further proposed the concept of a ‘hypergravity factor’, elucidating that the density of the base material, the dimensions of honeycomb cells and the magnitude of the hypergravity contribute to amplifying hypergravity effects. The results, numerically validated through finite-element simulations, could be reduced to the case that neglects body force. The critical buckling load of the honeycomb material under hypergravity can be assessed by setting the derived moduli to zero. In the presence of hypergravity, a honeycomb material undergoes a transition into a gradient material along the hypergravity direction, thereby exacerbating anisotropy. This phenomenon is theoretically expected to occur in virtually all porous materials. The analytical framework adopted, which employs beam stiffness as an intermediary variable, facilitates the extension of these results to honeycomb materials which encompass beam elements with functional gradients or varying cross-sectional morphologies.

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“…Introducing piezoelectric materials on small scales enables us to develop beneficial applications for such structures. Further, the use of piezoelectric materials in different structures, such as circular cylinders [1] and beams [2], have been studied for energy harvesting purposes. It is noteworthy that vibration-based energy harvesting has numerous positives, including high efficiency, reasonable expense, and significant resilience [3].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the vibration behavior of nano piezoelectric rod using surface effects and non-local elasticity theory

et al. 2023

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Due to the importance of the analysis of piezoelectric nanorods and their different conditions in engineering problems, in this research, for the first time, both nonlocal elasticity theory and surface energy theory have been used simultaneously to model the piezoelectric nanorod. the natural frequency values of the system have been extracted using the Galerkin weighted residual method. By applying an external excitation voltage, the forced vibrations of nonlocal nanorods with surface effects are presented. the results are reported for different vibrational modes, and the impact of different parameters such as dimensions, nonlocal parameters, and surface effects are investigated. the results of this study prove that the nonlocal elastic theory is more effective than the surface energy theory on the vibration behavior of piezoelectric nanorods. Also, the effect of piezoelectric properties is enhanced by the nano scaling of the rods.

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Usefulness of inclined circular cylinders for designing ultra-wide bandwidth piezoelectric energy harvesters: Experiments and computational investigations

Cited by 25 publications

References 64 publications

Energy Harvesting by V‐Shape Bluff Bodies with Various Apical Angles Attached to a Revolute Joint

Energy Harvesting by V‐Shape Bluff Bodies with Various Apical Angles Attached to a Revolute Joint

Equivalent in-plane elastic moduli of honeycomb materials under hypergravity conditions

Investigation of the vibration behavior of nano piezoelectric rod using surface effects and non-local elasticity theory

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