The scattering of P-waves by a piezoelectric particle with FGPM interfacial layers in a polymer matrix
| Autor: | Hossein M. Shodja, M.T. Kamali |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Piezoelectric coefficient Scattering Mechanical Engineering Applied Mathematics Isotropy Mathematical analysis Polymer matrix Equations of motion Axisymmetry FGPM coating Condensed Matter Physics Legendre function Piezoelectricity Classical mechanics Spherical piezoelectric inhomogeneity P-wave Materials Science(all) Mechanics of Materials Modeling and Simulation Modelling and Simulation General Materials Science Scattering cross-section Legendre polynomials Longitudinal wave |
| Zdroj: | International Journal of Solids and Structures. 47(18-19):2390-2397 |
| ISSN: | 0020-7683 |
| DOI: | 10.1016/j.ijsolstr.2010.04.030 |
| Popis: | Propagation of P-wave in an unbounded elastic polymer medium which contains a set of nested concentric spherical piezoelectric inhomogeneities is formulated. The polymer matrix is made of Epoxy and is isotropic; each phase of the inhomogeneity is made of a different piezoelectric material and is radially polarized and has spherical isotropy. Note that the individual phases are homogeneous, and all interfaces are perfectly bonded. The scattered displacement and electric potentials in the matrix are expressed in terms of spherical wave vector functions and Legendre functions, respectively. The transmitted displacement and electric potentials within each phase of the piezoelectric particle are expressed in terms of Legendre functions. The equations of motion and electrostatics in each phase of the piezoelectric inhomogeneity lead to a system of coupled second order differential equations, which is solved using the generalized Frobenius series. The present theory is extended to the case where the core of the inhomogeneity is made of PZT-4 and its coating is made of functionally graded piezoelectric material (FGPM) whose microstructural composition varies smoothly from PZT-4 at the core–coating interface to Epoxy at the coating–matrix interface. The effects of different types of variation in the electro-mechanical properties of FGPM on scattering cross-section and other electro-mechanical fields are addressed. The present theory is valid for arbitrary coating thickness, and arbitrary frequencies. |
| Databáze: | OpenAIRE |
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