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The Scattering of Electro-Elastic Fields of an SH-Wave in a
Piezoelectric Medium by an Eccentric Two-Phase Circular
Piezoelectric Micro Sensor

Jarfi, Hamid | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43446 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Mohammadi Shodja, Hossein
  7. Abstract:
  8. This thesis presents an analytical solution for determination of the
    electro-elastic media subjected to an anti plane shear harmonic wave containing a multi-phase cylindrical fiber whose electro-elastic properties differ from those of the matrix. Both the matrix and the coated-fiber system are transversely isotropic piezoelectric materials with symmetry and poling axes parallel to the fiber axis. The coating can have variable thickness. The dynamic electro-mechanical equivalent inclusion method (DEMEIM) is presented and employed as an extension of dynamic equivalent inclusion method (DEIM) in order to take into account the electro-mechanical coupling. Accordingly, the coating-fiber system is considered as a doubleinhomogeneity system replaced by an equivalent electro-elastic double inclusion problem with proper distribution of the eigenstrain, eigenelectric and eigenbody-force fields. The scattered electro-elastic fields are obtained in terms of Bessel, Hankel and polynomial functions by means of the Green’s function method. The exact expression for total scattering crosssection is obtained as well. The effects of electro-mechanical properties of the phases as well as the effect of the wave number on the scattered fields are examined
  9. Keywords:
  10. Piezoelectric ; Electro-Elastic Field ; Electromechanical Equivalent Inclusion Method (EMEIM) ; Scattering Cross Section ; Harmonic Plane Wave ; Two-Phase Sensor

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