MODELING AND MEASUREMENT OF NONLINEAR DYNAMIC BEHAVIOR IN PIEZOELECTRIC CERAMICS WITH APPLICATION TO 1-3 COMPOSITES

The nonlinear vibratory behavior of a 1-3 piezoceramic composite is ch aracterized theoretically and experimentally. The developed theoretica l model for the electroelastic behavior of the 1-3 composite follows c onventional assumptions made by prior investigators but includes nonli near terms to account for hysteresis in the embedded PZT phase. Experi mental measurements of the quasistatic and dynamic mechanical response of the 1-3 with embedded PZT-4 or PZT-5H phases to harmonic electrica l excitation over a range of excitation frequencies and two different mechanical lending conditions quantify the nature and level of nonline arity and illustrate its dependence on the type of PZT material and th e mechanical coupling conditions of the 1-3 to its surroundings. Good agreement exists between theoretical predictions and experimental meas urements. (C) 1998 Acoustical Society of America. [S0001-4966(98)03211 -1]