A periodic finite element formulation for the design of 2-2 composite transducers

A procedure based on a periodic finite element analysis is proposed to optimize 2-2 composite transducers. The principle of this approach consists in reducing parasitic Lamb wave propagation which may be guided by the structure by a proper choice of volume fraction of the PZT and the polymer. This information is deduced from the dispersion curve. The validity of the theoretical analysis is checked experimentally using 2 MHz 2-2 composite transducers.