Equivalent circuit model of magnetostrictive/piezoelectric laminate composite

Abstract

In this paper we development an equivalent circuital model of magnetostrictive/piezoelectric laminate composite for predict its behavior in presence of dynamic electromagnetic fields. From magnetostrictive and piezoelectric constitutive equations, and using an equation of motion, we obtained magnetic-mechanical-electric equations, and then built a symmetric ad-hoc equivalent circuit about the magnetoelectric coupling. The circuit is used to predict the voltage coefficients of Terfenol/PZT laminate. It is found that the laminates have significantly higher ME coefficients near resonance frequency and that the ME voltage coefficient is significantly higher when laminate works in T-T mode respect to L-T mode.