Derivation of Single Phase Material Properties Equivalent to 1-3 Piezoelectric Composites by the Resonant Method

공진법을 이용한 1-3형 압전복합체의 단일상 등가물성 도출

  • Received : 2011.07.03
  • Accepted : 2011.09.22
  • Published : 2011.10.31


Piezoelectric composites have been widely used in broadband acoustic transducers because of their lower acoustic impedance and higher electro-mechanical coupling factor. However, their complex structure has placed many limitations on the design of various transducers. This paper suggests the methodology to substitute the 1-3 piezocomposites by a single-phased material that has properties equivalent to those of the piezocomposites. The resonant method and finite element analysis (FEA) are used to derive the equivalent properties that can accurately depict resonant properties at various vibration modes of the piezocomposites. Validity of the suggested method is confirmed by comparing frequency characteristics of fabricated 1-3 piezocomposite specimens and FEA models. Further, accuracy of the derived material constants is checked by applying the equivalent properties to FEA models of the single phase material for various resonant modes.


Piezocomposite;Resonant Method;Equivalent Properties;Homogenization;Finite Element Analysis;Resonator


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