Flexoelectric and surface effects on the electromechanical behavior of graphene-based nanobeams

Shingare, K.B.; Kundalwal, S. I.

doi:10.1016/j.apm.2019.12.021

Cited by 17 publications

(10 citation statements)

References 79 publications

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“…If we consider both flexoelectric and surface effects, then the bending rigidity becomes ~4.5 times the bending rigidity, without considering the effect of flexoelectricity when the plate thickness is considered as 10 nm. Effective bending rigidity of the plate, considering both flexoelectric and surface effects, is determined by referring to Reference [8]. However, for the sake of brevity, results with surface effects are not considered for the remaining results.…”

Section: Pointmentioning

confidence: 99%

“…2021, 5, x of flexoelectricity when the plate thickness is considered as 10 nm. Effe gidity of the plate, considering both flexoelectric and surface effects, is d ferring to Reference [8]. However, for the sake of brevity, results with s not considered for the remaining results.…”

Section: Pointmentioning

confidence: 99%

“…Contrary to the piezoelectricity, flexoelectricity exits only in all dielectric materials. In addition to this, for the active control of lightweight smart structures subjected to static/dynamic loading conditions, these piezoelectric structures with flexoelectric effect plays significant role [6][7][8][9][10]. For instance, the most common and extensively used monolithic piezoelectric materials are lead zirconate titanate (PZT) and polyvinylidene fluoride (PVDF).…”

Section: Introductionmentioning

confidence: 99%

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Analytical Solution for Static and Dynamic Analysis of Graphene-Based Hybrid Flexoelectric Nanostructures

Shingare

Naskar

2021

J. Compos. Sci.

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Owing to their applications in devices such as in electromechanical sensors, actuators and nanogenerators, the consideration of size-dependent properties in the electromechanical response of composites is of great importance. In this study, a closed-form solution based on the linear piezoelectricity, Kirchhoff’s plate theory and Navier’s solution was developed, to envisage the electromechanical behaviors of hybrid graphene-reinforced piezoelectric composite (GRPC) plates, considering the flexoelectric effect. The governing equations and respective boundary conditions were obtained, using Hamilton’s variational principle for achieving static deflection and resonant frequency. Moreover, the different parameters considering aspect ratio, thickness of plate, different loadings (inline, point, uniformly distributed load (UDL), uniformly varying load (UVL)), the combination of different volume fraction of graphene and piezoelectric lead zirconate titanate are considered to attain the desired bending deflection and frequency response of GRPC. Different mode shapes and flexoelectric coefficients are also considered and the results reveal that the proper addition of graphene percentage and flexoelectric effect on the static and dynamic responses of GRPC plate is substantial. The obtained results expose that the flexoelectric effect on the piezoelastic response of the bending of nanocomposite plates are worth paying attention to, in order to develop a nanoelectromechanical system (NEMS). Our fundamental study sheds the possibility of evolving lightweight and high-performance NEMS applications over the existing piezoelectric materials.

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Section: Pointmentioning

confidence: 99%

Section: Pointmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analytical Solution for Static and Dynamic Analysis of Graphene-Based Hybrid Flexoelectric Nanostructures

Shingare

Naskar

2021

J. Compos. Sci.

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“…They showed the enhancement in the active damping property of the smart structures, which caused a reduction in respective vibrations. Most recently, a graphene-based PZC was also being studied by Shingare et al [23][24][25][26] They predicted electromechanical properties of the graphene-based nanocomposites with micromechanical model based on the mechanics of materials (MOM), 27 modified strength of materials and finite element (FE) approach. Their results showed enhanced out-ofplane piezoelectric constant (e 33 ) as compared to inplane piezoelectric constant (e 31 ); the similar trend was also observed by Ray and Batra team.…”

Section: Introductionmentioning

confidence: 99%

Dynamic modelling and analysis of smart carbon nanotube-based hybrid composite beams: Analytical and finite element study

Gupta

Ray

Patil

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this work, the carbon nanotube-based hybrid carbon fibre-reinforced composite smart beam constraining the layer of an active constrained layer damping treatment is investigated using an in-house finite element model based on first-order shear deformation theory. The effect of in-plane and transverse-plane actuation of the integrated active constrained layer damping treatment layer on the damping characteristics of the novel smart cantilever hybrid carbon fibre-reinforced composite beam is considered. The parameters affecting the damping characteristics of the hybrid carbon fibre-reinforced composite substrate beam such as the volume fraction of both carbon nanotubes and carbon fibre, and the aspect ratio are also studied. Besides, the micromechanical model based on the mechanics of materials approach is developed to estimate the effective elastic coefficient of novel hybrid carbon fibre-reinforced composite lamina. The effective properties of hybrid carbon fibre-reinforced composite are predicted quantitatively by considering non-bonded interaction formed between carbon nanotubes and the polymer matrix. It is revealed that due to the incorporation of carbon nanotubes into the epoxy matrix, the effective longitudinal, transverse and shear properties of the hybrid carbon fibre-reinforced composite lamina are significantly enhanced. Our outcomes explore that the damping performance of the laminated hybrid carbon fibre-reinforced composite smart beam considering the incorporation of carbon nanotubes shows substantial improvement as compared to the base composite. To bring more clarity, the quantitative relative performance of hybrid carbon fibre-reinforced composite and base composite is presented. Our fundamental analysis sheds the light on the opportunities of developing efficient, high-performance and lightweight carbon nanotubes-based micro-electro-mechanical systems smart structures such as sensors, actuators and distributors.

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“…The buckled PZT (or lead zirconate titanate, Pb[Zr(x)Ti(1 − x)]O 3 ) nanoribbons can sustain large strain gradients and give a rise of up to 70% enhancement of the apparent piezoelectric performance as a result of the flexoelectric effect. By studying the electromechanical behavior of graphene-based nanocomposite beams, Kishor and Kundalwal [13] found that the flexoelectric and surface effects on the static response of GNC (graphene-based nanocomposite) nanobeams were significant and could not be ignored. Qi et al [14] established a flexoelectric curved microbeam model based on the flexoelectric theory, incorporating strain gradient and polarization gradient.…”

Section: Introductionmentioning

confidence: 99%

Active Actuating of a Simply Supported Beam with the Flexoelectric Effect

Fan

Min

2020

Materials

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Piezoelectric materials with the electro-mechanical coupling effect have been widely utilized in sensors, dampers, actuators, and so on. Engineering structures with piezoelectric actuators and sensors have provided great improvement in terms of vibration and noise reduction. The flexoelectric effect—which describes the coupling effect between the polarization gradient and strain, and between the strain gradient and electric polarization in solids—has a fourth-rank order tensor electro-mechanical coupling coefficient, and in principle makes the flexoelectricity existing in all insulating materials and promises an even wider application potential in vibration and noise control. In the presented work, a flexoelectric actuator was designed to actuate a simply supported beam. The electric field gradient was generated by an atomic force microscopy probe. Flexoelectric control force and moment components could be induced within the flexoelectric control layer. As flexoelectricity is size-dependent, the key parameters that could affect the actuating effect were examined in case studies. Analytical results showed that the induced flexoelectric control moment was strongly concentrated at the probe location. The controllable transverse displacement of the simply supported beam was calculated with the modal expansion method. It was found that the controllable transverse displacement was dependent on the probe location as well.

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Flexoelectric and surface effects on the electromechanical behavior of graphene-based nanobeams

Cited by 17 publications

References 79 publications

Analytical Solution for Static and Dynamic Analysis of Graphene-Based Hybrid Flexoelectric Nanostructures

Analytical Solution for Static and Dynamic Analysis of Graphene-Based Hybrid Flexoelectric Nanostructures

Dynamic modelling and analysis of smart carbon nanotube-based hybrid composite beams: Analytical and finite element study

Active Actuating of a Simply Supported Beam with the Flexoelectric Effect

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