Nonlinear analysis of functionally graded piezoelectric energy harvesters

Derayatifar, Mahdi; Tahani, Masoud; Moeenfard, Hamid

doi:10.1016/j.compstruct.2017.09.030

Cited by 32 publications

(27 citation statements)

References 29 publications

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“…In the considered system, the substrate layer is assumed to be made of pure metallic constituent while the piezoelectric layers are composed of both metallic and piezoelectric materials. The physical properties of each point of the functionally graded material obey the power-law function (Derayatifar et al, 2017), expressed as…”

Section: Formulationmentioning

confidence: 99%

“…Functionally graded piezoelectric materials (FGPMs) have been developed to remove discontinuity and render the sensing and actuating structures with a low level of stress concentration. By optimizing the volume fraction of two constituent phases it is possible to produce larger displacements resulting in higher output power (Derayatifar et al, 2017). The principle can also help designers to increase the lifetime of energy harvesting devices.…”

Section: Introductionmentioning

confidence: 99%

“…They subsequently analyzed the time domain frequency of FGPMs subjected to random vibration (Amini et al, 2016). Dealing with nonlinear vibration of bimorph FGPMs is another study carried out with some research team (Derayatifar et al, 2017). They considered the geometrical nonlinear terms (von Ka´rma´n nonlinearities) with the assumption of the Rayleigh beam theory.…”

Section: Introductionmentioning

confidence: 99%

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Performance of non-uniform functionally graded piezoelectric energy harvester beams

Hajheidari

Stiharu

Bhat

2020

Journal of Intelligent Material Systems and Structures

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The appearance of functionally graded piezoelectric materials has solved the lamination problem of the conventional piezoelectric structures. Functionally graded piezoelectric materials are the new materials with unexplored capabilities. This article theoretically investigates the effects of non-uniformity on the performance of the functionally graded piezoelectric material cantilever beams subjected to harmonic excitation. The governing equations are derived based on Timoshenko and Euler–Bernoulli beam theories. The finite element method with the application of superconvergent element is employed here for the discretization and the vibration analysis of the system. This model is validated by comparing the numerical results with the experimental results of piezoelectric energy harvesters of conventional shapes available in the open literature. Parametric studies are carried out with respect to the effects of tapering ratios, the degree of non-uniformity, load resistance, and the volume fraction parameter on the electrical output power and the fundamental resonance frequency. It was observed that the application of diverging beams noticeably enhances the power output per mass of piezoelectric element extracted while decreases the natural frequency which is advantageous for scavenging energy from ambient surroundings. The results reveal that there is an optimal value for the non-homogeneous parameter leading to the maximized harvested energy under different operating conditions.

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Section: Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance of non-uniform functionally graded piezoelectric energy harvester beams

Hajheidari

Stiharu

Bhat

2020

Journal of Intelligent Material Systems and Structures

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“…Amini et al (2015, 2016) proposed a finite element (FE) model for bimorph energy harvester made of functionally graded layers, and studied the effect of grading index on linear response of FGPEH for deterministic and random excitation. Derayatifar et al (2017) studied FGPEH beam with attached tip mass. They considered the geometric nonlinearity and using energy method derived nonlinear coupled governing equations and then studied the effect of grading index on free and forced nonlinear vibration responses.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of a functionally graded piezoelectric energy harvester under magnetic interaction

Derayatifar

Chandramohan

Packirisamy

et al. 2021

Journal of Intelligent Material Systems and Structures

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The aim of this embodiment is to present an analytical analysis of a functionally graded piezoelectric energy harvester consisting of a flexible functionally graded piezoelectric layers carrying magnetic mass at the free end. The magnetic tip mass is in interaction with a permanent magnet which is located at a distance from the top of the tip mass. The oscillation of the harvester happens via excitation of the base. Using Rayleigh’s beam theory and Hamilton’s principle and considering geometric nonlinearity, the coupled electromechanical governing equations have been developed. The nonlinear frequency response of the piezoelectric energy harvester beam has also been studied under base excitation. A parametric study has been carried out to investigate the effect of grading index and magnetic force on responses of both free vibration and induced excitation cases. The results were compared with those obtained using three-dimensional finite element model developed in COMSOL Multiphysics 5.5 commercial software and good agreement has been observed. The results from both the analytical method and simulation confirm that tuning the design parameters of grading index and magnetic gap to the optimal value results in a considerable change in the performance of the energy harvester.

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“…Functionally Graded Ceramics (FGCs) are designed to withstand a variety of severe operative conditions, including high temperatures, corrosive environments, abrasion, mechanical, and thermal‐induced stresses . An overview of the FGC structures already developed and their main application fields is proposed in Table .…”

Section: Introduction To Fgmsmentioning

confidence: 99%

Functionally graded ceramics for biomedical application: Concept, manufacturing, and properties

Petit

Montanaro

Palmero

2018

Int J Applied Ceramic Tech

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Functionally Graded Materials (FGMs) represent a novel approach for the realization of innovative properties and/or functions that conventional homogeneous materials cannot accomplish. In conventional materials, in fact, the composition or the structure is uniform over the volume; on the opposite, in FGMs such features gradually change from layer to layer, with the aim of realizing a gradation of properties over the volume and performing a set of specified functions. Among FGMs, special attention is given today to Functionally Graded Ceramics (FGCs), designed and developed to withstand a variety of severe operative conditions, including high temperatures, corrosive environments, abrasion, mechanical, and thermal induced stresses. An important application field of FGCs is for medical prosthetic devices and artificial tissues, taking inspiration from the several examples of living tissues with graded structures. After an introduction on the rationale for using FGCs in the biomedical field, the 3 main types of graded materials developed today (eg, composition, porosity and microstructural graded ceramics) are here reviewed, highlighting the most innovative technologies used to develop them, their potentials and challenging features in comparison with the monolithic counterparts. K E Y W O R D S

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Nonlinear analysis of functionally graded piezoelectric energy harvesters

Cited by 32 publications

References 29 publications

Performance of non-uniform functionally graded piezoelectric energy harvester beams

Performance of non-uniform functionally graded piezoelectric energy harvester beams

Dynamic analysis of a functionally graded piezoelectric energy harvester under magnetic interaction

Functionally graded ceramics for biomedical application: Concept, manufacturing, and properties

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