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The plane problem of piezoelectric curved beam which is polarized in the radial direction is considered within the frame of state space. The piezoelectric material is assumed to be transverse isotropic and all the elastic stiffness, piezoelectric and dielectric constants are constants. The symplectic method uses the displacements, the electrical potential function and their conjugate variables (stresses,...
This paper applies the symplectic method to solve the plane problem of functional graded piezoelectric materials (FGPM) whose elastic stiffness, piezoelectric and dielectric constants vary exponentially with the axial coordinate. After introducing the displacements (the electrical potential function) and their conjugate stress (electric displacement), the problem is formulated within the frame of...
This paper focuses on not only the isotropic chiral but also gyrotropic chiral materials with primary interest in dispersion, realization of double negative materials (DNG) and negative refractive index. To take into account the dispersion, the Condon model together with Tellegen's definition of chiral media is used for the frequency dependence of three parameters (permittivity, permeability and chirality)...
The behavior of wave propagation, the possibility of backward eigenwaves, the realization of negative refractive index, and the impedance of the eigenmodes of gyrotropic chiral media are examined in detail. Since the gyrotropic parameters in the permittivity and permeability tensors favor the realization of the negative refraction in gyrotropic chiral medium, the negative-index media (NIM) can be...
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