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Two dimensional equations are derived for multiferroic circular cylindrical panels with small aspect ratio. The displacement, electrical potential and magnetic potential are assumed to be of zero-order of the radial thickness. The frequency equation is presented for a multiferroic cylindrical panel composed of CoFe2O3 and BaTiO3 with four edges simply supported. Numerical examples show clearly the...
This paper focuses on the delamination detection in composite beams using electro-mechanical impedance (EMI) signatures, which is directly related to the structure's mechanical impedance. A model of a laminated beam including a delamination as well as installed PZT transducers is presented. Furthermore, the model has to take into account the dynamic behavior of the piezoelectric patches and simulate...
The laminated piezoelectric cantilever actuators under constant voltage are investigated. Based on partial differential equations for the plane problem of piezoelectric materials, the stress function and electric displacement function are assumed to be undetermined polynomials, which can be acquired through successive integrations. The analytical solutions are then obtained, with the integral constants...
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...
The focus of this paper is to study an infinite composite hollow cylinder consisting of a homogeneous piezoelectric layer and a functionally graded elastic layer. A general linear spring-layer model is employed to characterize the interface between the two layers, which may be perfect or imperfect. Directly based on the three-dimensional exact equations of elasticity and piezoelasticity, the state...
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