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- 实验方案
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Frequency characteristics of a GPL-reinforced composite microdisk coupled with a piezoelectric layer
摘要： This is the ?rst research on the frequency analysis of a graphene nanoplatelet composite (GPLRC) microdisk in the framework of a numerical-based generalized differential quadrature method. The stresses and strains are obtained using the higher-order shear deformable theory. Rule of mixture is employed to obtain varying mass density, thermal expansion, and Poisson’s ratio, while module of elasticity is computed by modi?ed Halpin–Tsai model. Governing equations and boundary conditions of the GPLRC microdisk covered with piezoelectric layer are obtained by implementing Hamilton’s principle. Regarding perfect bonding between the piezoelectric layer and core, the compatibility conditions are derived. In addition, due to the existence of piezoelectric layer, Maxwell’s equation is derived. The results show that outer-to-inner ratio of radius (Ro/Ri), ratios of length scale and nonlocal to thickness (l/h and μ/h), ratio of piezoelectric to core thickness (hp/h), applied voltage, and GPL weight fraction (gGPL) have signi?cant in?uence on the frequency characteristics of the GPLRC microdisk. Another important consequence is that in addition to the nonlinear indirect effects of applied voltage on the natural frequency of the GPLRC microdisk covered with piezoelectric for each speci?c value of Ro/Ri, the impact of the Ro/Ri on the natural frequency is indirect. A useful suggestion of this research is that, for designing the GPLRC circular microplate at the low value of the Ro/Ri should be more attention to the gGPL and Ro/Ri, simultaneously.
关键词： Higher-order shear deformable theory,Halpin–Tsai model,Microdisk,Piezoelectric layer,Hamilton’s principle,Maxwell’s equation,Generalized differential quadrature method,Frequency analysis,Graphene nanoplatelet composite (GPLRC)
更新于2025-09-19 17:13:59
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Influence of system parameters on buckling and frequency analysis of a spinning cantilever cylindrical 3D shell coupled with piezoelectric actuator
摘要： In this research, buckling and vibrational characteristics of a spinning cylindrical moderately thick shell covered with piezoelectric actuator carrying spring-mass systems are performed. This structure rotates about axial direction and the formulations include the Coriolis and centrifugal effects. In addition, various cases of thermal (uniform, linear, and nonlinear) distributions are studied. The modeled cylindrical moderately thick shell covered with piezoelectric actuator, its equations of motion, and boundary conditions are derived by the Hamilton’s principle and based on a moderately cylindrical thick shell theory. For the first time in the present study, attached mass-spring systems has been considered in the rotating cylindrical moderately thick shells covered with piezoelectric actuator. The accuracy of the presented model is verified with previous studies. The novelty of the current study is consideration of the applied voltage, rotation, various temperature distributions, and mass-spring systems implemented on proposed model using moderately cylindrical thick shell theory. Generalized differential quadrature method is examined to discretize the model and to approximate the governing equations. In this study, the simply supported conditions have been applied to edges (cid:2) ? (cid:3)=2, 3(cid:3)=2 and cantilever (clamped–free) boundary conditions has been studied in x ? 0, L, respectively. Finally, the effects of the applied voltage, angular velocity, temperature changes, and spring-mass systems on the critical voltage, critical angular speed, critical temperature, and natural frequency of the structure are investigated.
关键词： cantilever cylindrical moderately thick shell,piezoelectric layer,spring-mass systems,spinning,Various thermal loading
更新于2025-09-12 10:27:22
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[IEEE 2018 International Conference on Actual Problems of Electron Devices Engineering (APEDE) - Saratov, Russia (2018.9.27-2018.9.28)] 2018 International Conference on Actual Problems of Electron Devices Engineering (APEDE) - Strain-Tuned Multi-Channel Coupler Based on the Lateral Structure
摘要： We observe strain-induced spin-wave routing in the bilateral composite multilayer. By means of Brillouin light scattering, we study the spin-wave transport across three adjacent magnonic stripes, which are strain coupled to a piezoelectric layer. The strain may effectively induce voltage-controlled dipolar spin-wave interactions. We experimentally demonstrate the basic features of the voltage-controlled spin-wave switching. We show that the spin-wave characteristics can be tuned with an electrical field due to piezoelectricity and magnetostriction of the piezolayer and layered composite and mechanical coupling between them.
关键词： spin-wave transport,piezoelectricity,Brillouin light scattering,voltage-controlled spin-wave switching,strain-induced spin-wave routing,magnonic stripes,piezoelectric layer,magnetostriction,voltage-controlled dipolar spin-wave interactions
更新于2025-09-04 15:30:14