Effect of flexoelectricity on the electromechanical response of graphene nanocomposite beam

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

doi:10.1007/s10999-018-9417-6

Cited by 21 publications

(6 citation statements)

References 68 publications

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“…Here, the results of resonant frequencies of hybrid flexoelectric plates are presented to investigate the effect of flexoelectricity and different modes by varying in-plane dimension with respect to plate thickness. Figure 11 demonstrates the effect of flexoelectricity on the resonant frequency of hybrid flexoelectric GRPC plate for different modes, such as (1, 1), (2, 2), (3,3), (4,4) and (5,5), with respect to plate thickness. The results shown in .…”

Section: Modal Analysis Of Hybrid Flexoelectric Grpc Platementioning

confidence: 99%

“…Piezoelectric material exhibits the property to generate the electrical response to an applied homogeneous strain and vice versa. Moreover, the flexoelectric effect was observed by Mashkevich and Tolpygo [1] and defined as the spontaneous electric response to an applied strain gradient (inhomogeneous strain) and is allowed by symmetry in all materials [2][3][4][5]. Similar to piezoelectric effect, the flexoelectric effect is also characterized into two types: (i) direct flexoelectric effect, which is coupling between the electric response (in terms of polarization or electric field) and gradient of mechanical responses (stress gradient i.e., higher order stress or strain gradient); and (ii) converse flexoelectric effect, which refers to coupling between the mechanical responses (stress/strain) and gradient of electric response (electric field gradient/polarization gradient).…”

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: Modal Analysis Of Hybrid Flexoelectric Grpc Platementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Shingare

Naskar

2021

J. Compos. Sci.

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“…The source of anomalous piezoelectric properties in non-piezoelectric materials is the violation of the structural symmetry on the surfaces and interfaces [8][9][10][11][12][13][14]. Due to high mechanical strength and elasticity, much attention in this direction has been attracted by carbon nanostructures subjected to various modifications [2,[15][16][17][18][19][20][21]. It has been experimentally and theoretically proven that a graphene sheet demonstrates surface piezoelectricity and flexoelectricity when non-centrosymmetric pores are formed in it [19,22], when creating a bending moment and biaxial strain [9,15,17], and through the selective surface adsorption of atoms [2,16,19,23].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Piezoelectric Properties of Aligned Multi-Walled Carbon Nanotubes

et al. 2021

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Recent studies reveal that carbon nanostructures show anomalous piezoelectric properties when the central symmetry of their structure is violated. Particular focus is given to carbon nanotubes (CNTs) with initial significant curvature of the graphene sheet surface, which leads to an asymmetric redistribution of the electron density. This paper presents the results of studies on the piezoelectric properties of aligned multi-walled CNTs. An original technique for evaluating the effective piezoelectric coefficient of CNTs is presented. For the first time, in this study, we investigate the influence of the growth temperature and thickness of the catalytic Ni layer on the value of the piezoelectric coefficient of CNTs. We establish the relationship between the effective piezoelectric coefficient of CNTs and their defectiveness and diameter, which determines the curvature of the graphene sheet surface. The calculated values of the effective piezoelectric coefficient of CNTs are shown to be between 0.019 and 0.413 C/m2, depending on the degree of their defectiveness and diameter.

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“…[30,31] Flexoelectricity impact on the electromechanical behavior of piezoelectric GEN beams were studied using the mechanics of materials in ref. [32] The failure mechanics and elasticity modulus of a metallic nanocomposite made of CNT and aluminum were studied by developing a bridging cell multiscale model in ref. [33].…”

Section: Introductionmentioning

confidence: 99%

Damped harmonic vibrations of axisymmetric graphene‐enhanced cylinders in thermal environment

Moradi‐Dastjerdi

Behdinan

2021

Polymer Composites

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In this paper, the structural damping behavior of axisymmetric nanocomposite cylinders enhanced with randomly oriented graphene nanosheets has been explored by a mesh-free solution. The static responses of such nanocomposite cylinders under internal pressure and exposed to thermal environment are assumed as the initial condition of harmonic vibrations. Using the shape functions of moving least squares (MLS), an axisymmetric mesh-free solution has been developed to approximate the displacement field of the graphene-enhanced nanocomposite (GEN) cylinders. Along the thickness of these cylinders, different nonlinear functionally graded (FG) patterns are considered for the distribution of graphene nanosheets. The mechanical properties of graphene and polymer are considered to vary with temperature, and the overall properties of nanocomposite are calculated using a modified Halpin-Tsai (HS) technique. The effects of thermal environment, graphene content, graphene dispersion, and cylinder dimension on the structural damped harmonic vibrations of axisymmetric GEN cylinders have been examined. The results indicate that the use of graphene nanosheets and their distribution significantly affect the damped harmonic vibrations of axisymmetric polymeric cylinders such that the increase of graphene content results in damped vibrations with higher frequency and shorter stationary time. In addition, thermal environment reduced the frequency of vibrations, but it has an insignificant impact on the stationary time of vibrations.

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Effect of flexoelectricity on the electromechanical response of graphene nanocomposite beam

Cited by 21 publications

References 68 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

Analysis of the Piezoelectric Properties of Aligned Multi-Walled Carbon Nanotubes

Damped harmonic vibrations of axisymmetric graphene‐enhanced cylinders in thermal environment

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