Abstract
An investigation of the effect of initial stress on the lateral modes in 1-3 piezocomposites is conducted. The Governing equations, taking into account the piezoelectricity, initial stress, and initial strain, are developed for the piezocomposites. Analytical solutions of the mechanical displacement and electric potential function are obtained based on the Bloch waves theory. Influence of the initial stress on the lateral modes frequencies and the stop band are discussed in detail, respectively. The conclusion reached indicates that the lateral mode frequencies increase with the piezoelectricity of the piezocomposites, but decrease with the poling initial stress in piezocomposites.
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