Analysis of wave-particle drag effect in flexoelectric semiconductor plates via Mindlin method

Qu, Yu; Zhu, Feng; Pan, Ernian; Jin, Feng; Hirakata, Hideki

doi:10.1016/j.apm.2023.01.040

Cited by 18 publications

(3 citation statements)

References 32 publications

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“…The majority of piezoelectric materials exhibit class mm2 symmetry [75]. Similarly, most commonly used flexoelectric materials exhibit class m3m symmetry [70,76,77], which has a higher symmetry order. Since we model both piezoelectric and flexoelectric effects in the current study, we use the constitutive relations for the lower symmetry order, i.e.…”

Section: One-dimensional Model For Flexoelectric Actuator–plate Inter...mentioning

confidence: 99%

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A flexoelectric actuator model with shear-lag and peel stress effects

Rout

Kapuria

2023

Proc. R. Soc. A.

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Flexoelectric materials are being extensively studied in recent years for potential sensing, actuation, energy harvesting and structural health monitoring applications. However, no analytical model exists in the literature to predict the stress transfer between a flexoelectric transducer and the host structure, considering bonding compliance. In this article, we present an analytical model for the interfacial stresses and deformations of flexoelectric patch actuator(s) bonded to an isotropic host plate considering both shear-lag and peel stress effects at the interface(s). The model is valid for both piezoelectric and flexoelectric effects. The system’s one-dimensional governing equations are derived consistently from the three-dimensional equations for linear dielectric solids obtained using the bulk electric Gibbs energy density function and extended Hamilton’s principle. The transducer and substrate, modelled as classical Kirchhoff plates, undergo both extension and bending deformations. The formulation produces a seventh-order differential equation for the interfacial shear stress, which is solved analytically, satisfying all boundary conditions. The solution is validated by comparing with the available results for piezoelectric actuators with a non-rigid interface and those of flexoelectric actuators based on the pin-force-moment model assuming a rigid interface. Detailed numerical studies are presented to show the effect of the plate, actuator and adhesive parameters on the interfacial stresses and deformations. Finally, the size effect of the actuators at the micro-scale is illustrated.

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Section: One-dimensional Model For Flexoelectric Actuator–plate Inter...mentioning

confidence: 99%

“…This configuration can be used to excite two fundamental modes in the host plate: (i) pure extension and (ii) bending (as reported in, e.g. [77,79]). On the other hand, the single-actuator configuration will always induce both extension and bending.…”

Section: One-dimensional Model For Flexoelectric Actuator–plate Inter...mentioning

confidence: 99%

A flexoelectric actuator model with shear-lag and peel stress effects

Rout

Kapuria

2023

Proc. R. Soc. A.

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“…Thus, all physical fields in the composite fiber change only along the axial coordinate z , so the composite fiber can be simplified as a 1D rod model. In addition, the scale effect exists in nanoscale structures, such as strain gradient effects, [ 22 ] flexoelectric effects, [ 23 ] etc. However, our focus is not the scale effects; thus, we ignore the size effects in this study.…”

Section: D Theoretical Modelmentioning

confidence: 99%

Study on Nonlinear Dynamic Responses of the p–n GaN/AlN Heterojunction in Piezoelectric Semiconductor Composite Fibers

Zhang,

Tan,

Wang

et al. 2023

Physica Status Solidi (a)

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In this study, a PN GaN/AlN heterojunction in a piezoelectric semiconductor composite fiber driven by dynamic magnetic loads is studied. The numerical results of nonlinear dynamic responses of a composite PN heterojunction subjected to a time‐harmonic magnetic load and a pulse magnetic load are obtained by the finite element method, respectively. The effect of different magnetic loads on the I‐V curve and piezoelectric behavior of a composite PN heterojunction are investigated. Numerical results show that when driven by uniformly dynamic magnetic loads, the electromechanical fields show a significant asymmetry due to the electric nonlinearity. The time‐harmonic magnetic loads drive the round‐trip motion of electrons and holes, and the dynamic electric behaviors driven by pulsed magnetic loads are nonlinear pulse motions. Further analysis of the PN heterojunction subjected to the bias voltage shows that positive magnetic loads increase the depletion layer’s width but decrease the carrier concentration. The results presented in this study have a referential significance to contactless performance tuning of a PSC heterojunction structure and new‐generation piezotronic devices.This article is protected by copyright. All rights reserved.

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