Geometric effects on the stopband structure of 2-2 piezoelectric composite plates

Piezoelectric composites have become an important part of medical transducer design over the past several years. A critical issue in the proper design of these materials is an understanding of the stopband edge resonances which produce a net piezoelectric response. Previous work has been done showing the stopband structure for 2-2 composite plates which have a unit cell length greater than the plate thickness (d>t). A simple model for predicting the stopband resonance frequencies in 2-2 composite plates with the length of the unit cell smaller than the plate thickness (d>