Monolithic modeling and finite element analysis of piezoelectric energy harvesters

Ravi, Srivathsan; Zilian, Andreas

doi:10.1007/s00707-017-1830-7

Cited by 16 publications

(11 citation statements)

References 21 publications

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“…The electrodes are assumed to continuously cover the entire top and bottom surfaces of the upper and lower piezoelectric layers. In this case, the electric potential on each surface does not change in the axial direction of the beam, which is also called the equipotential condition [23]. The mechanical effects and the resistance of the electrodes are negligible.…”

Section: Strong Form Equationsmentioning

confidence: 98%

“…Apart from analytic approaches with closed-form solutions generally used in the aforementioned research, the approximate solutions using the finite element (FE) method are also proposed, e.g., models based on Euler-Bernoulli assumptions by [6,21,22], a linear three-dimensional (3D) model by [23]. Finite element modeling is particularly valuable when studying the electromechanical behavior of complex PEHs because closed-form solutions are only available to PEHs with simple configurations [23].…”

Section: Introductionmentioning

confidence: 99%

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A geometrically nonlinear shear deformable beam model for piezoelectric energy harvesters

2021

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An electromechanical model for beam-like piezoelectric energy harvesters based on Reissner’s beam theory is developed in this paper. The proposed model captures first-order shear deformation and large displacement/rotation, which distinguishes this model from other models reported in the literature. All governing equations are presented in detail, making the associated framework extensible to investigate various piezoelectric energy harvesters. The weak formulation is then derived to obtain the approximate solution to the governing equations by the finite element method. This solution scheme is completely coupled, and thus allows for two-way interaction between mechanical and electrical fields. To validate this model, extensive numerical examples are implemented in the linear and nonlinear regime. In the linear limit, this model produces results in excellent agreement with reference data. In the nonlinear regime, the large amplitude response of the piezoelectric beam induced by strong base excitation or fluid flow is considered, and the comparison of results with literature data is encouraging. The ability of this nonlinear model to predict limit cycle oscillations in axial flow is demonstrated.

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Section: Strong Form Equationsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A geometrically nonlinear shear deformable beam model for piezoelectric energy harvesters

2021

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“…Energy harvesters are those devices which can collect energy from the external sources like wind energy, solar power, thermal energy, etc. Specifically, the electromechanical energy harvester can collect energy from the mechanical vibrations [126][127][128][129][130][131][132]. Recently, the newly designed energy harvester which collect energy from the fluctuation of the vibrations (strain gradient) was proposed.…”

Section: Energy Harvestersmentioning

confidence: 99%

Flexoelectric materials and their related applications: A focused review

et al. 2019

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Flexoelectricity refers to the mechanical-electro coupling between strain gradient and electric polarization, and conversely, the electro-mechanical coupling between electric field gradient and mechanical stress. This unique effect shows a promising size effect which is usually large as the material dimension is shrunk down. Moreover, it could break the limitation of centrosymmetry, and has been found in numerous kinds of materials which cover insulators, liquid crystals, biological materials, and semiconductors. In this review, we will give a brief report about the recent discoveries in flexoelectricity, focusing on the flexoelectric materials and their applications. The theoretical developments in this field are also addressed. In the end, the perspective of flexoelectricity and some open questions which still remain unsolved are commented upon.

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“…Among them, collecting the vibration energy available in the environment and converting it into useful electrical energy has been attracting intensive attention of researchers in recent years [5][6][7][8][9]. Vibration-based piezoelectric EHs have a particular appeal due to their simple structures and high energy densities [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A novel multimodal and multidirectional energy harvester by asymmetric 3D skeletal frame structures

Fattahi

Mirdamadi

2020

J Braz. Soc. Mech. Sci. Eng.

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Designing multimodal and multidirectional energy harvester (EH) topologies with high-strain areas is among the most demanding and critical obstacles encountered in powering small electronics and wireless sensor networks. These deficiencies are highly considerable by utilizing the conventional cantilever beam EHs. In order to overcome these challenges, effective structural design is required. In this paper, two different 3D asymmetric skeletal frame topologies are designed and introduced for energy harvesters. The vibrational behaviors of the proposed structures are investigated using finite element method and compared to corresponding 1D beam and 3D symmetric frame topologies. Furthermore, the electromechanical responses of the aforementioned EHs are obtained showing the advantages in more detail. The results imply that the asymmetric frames can simultaneously solve the main problems of EHs in a successful manner.

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Monolithic modeling and finite element analysis of piezoelectric energy harvesters

Cited by 16 publications

References 21 publications

A geometrically nonlinear shear deformable beam model for piezoelectric energy harvesters

A geometrically nonlinear shear deformable beam model for piezoelectric energy harvesters

Flexoelectric materials and their related applications: A focused review

A novel multimodal and multidirectional energy harvester by asymmetric 3D skeletal frame structures

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