Probing the prediction of effective properties for composite materials

2021

J. Compos. Sci.

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: Resultsmentioning

confidence: 99%

“…Making use of Equations ( 37) and (38) into Equation (36), one can derive the transverse deflection of the SS plate. w(x, y) =…”

Section: Closed-form Solution For Static Analysis Of Grpc Platesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2021

J. Compos. Sci.

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“…The effective properties of GRHC were evaluated using a three-phase MOM model with consideration of graphene volume fraction which is considered 0.2 times volume fraction of PZT-5H which is taken from Shingare and Naskar 57 and are enlisted in Table 2. These properties of GRHC are used to envisage the electrostatic response of hybrid nanorods (NR).…”

Section: Resultsmentioning

confidence: 99%

Compound influence of surface and flexoelectric effects on static bending response of hybrid composite nanorod

The Journal of Strain Analysis for Engineering Design

2022

Nanoscale beams and rods are extensively used in several nano-electro-mechanical systems (NEMS) and their applications such as sensors and actuators. The surface and flexoelectricity phenomena have an extensive effect on nanosized structures and are related to their scale-dependent characteristics. This article presents the effect of different surface parameters and flexoelectricity on the electrostatic response of graphene-reinforced hybrid composite (GRHC) nanorods (NRs) using the theory of linear piezoelectricity, Euler-Bernoulli (EB), and Galerkin residual method. Based on these theories, the theoretical and finite element (FE) model is produced to investigate the static bending deflection of GRHC NRs when subjected to point and uniformly distributed load (UDL) considering different boundary conditions: cantilever (FC), fixed-fixed (FF), and simply supported (SS). This proposed FE model provides a useful tool for analyzing and investigating the outcomes of analytical models, which are found to be in good agreement. Our results presented in this article reveal that the effect of surface and flexoelectricity on the static bending response of GRHC NRs is noteworthy. These effects diminish with increased thickness/diameter of NR, and hence, these effects can be neglected for large-sized structures. The results presented here would help to identify the desired electrostatic response of GRHC NRs in terms of static bending response for a range of NEMS using different loading and boundary conditions as well as graphene volume fraction. This current study offers pathways for developing new proficient novel GRHC materials with enhanced control authority and present models can be exploited for numerous other materials as well as line-type structural systems such as beams, wires, rods, column/piers, and piles to study their global response.

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“…(Kiani, 2018) examined the free vibration of composite plates incorporated with GPLs to study large amplitudes with the help of iso-geometric finite element (FE) modeling. Researchers (Karsh et al, 2019;Kundalwal, 2019, 2020;Shingare and Naskar, 2021a;Trinh et al, 2020;Vaishali et al, 2020;Naskar et al, 2017) studied the electromechanical response of hybrid graphene-based nanocomposites (GNC) including beam, plate, wire, and shell by incorporating piezoelectric graphene nanofiber in a polyimide matrix. In such studies, they assumed graphene as nanofiber and found the effect of size-dependent phenomena (piezoelectricity, flexoelectricity, and surface effect) on these non-FGM GNC structures.…”

Section: Introductionmentioning

confidence: 99%

Flexoelectricity and surface effects on coupled electromechanical responses of graphene reinforced functionally graded nanocomposites: A unified size-dependent semi-analytical framework

Mechanical Systems and Signal Processing

Mondal

et al. 2022

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