The Simulation of Rate-Dependent Behavior of Ferroelectroelastic Materials under Cyclic Loading

Resumo

A phenomenological model of the nonlinear coupled electromechanical behavior of a polycrystalline ferroelectric piezoceramics under the complex multi-axis exposure is developed while considering sensitivity to the loading rate and is aimed at solving boundary value problems. The ability to describe creep effects and sensitivity of the hysteresis curves to the external exposure frequency is considered in the context of a single model. The predicted data are compared to the experimental results on macroscopic samples of PZT PIC 151 piezoceramic subjected to cyclic loading. The juxtaposition of theoretical data with those simulated via other models reveals better accuracy of the model proposed in the present study.