Network formalism for modeling functionally gradient piezoelectricplates and stacks and simulations of RAINBOW ceramic actuators

摘要

A simple network representation is given for a stack of thin,nhomogeneous piezoelectric plates, executing a single thickness mode ofnmotion. All plates may differ in thickness and material properties,nincluding dielectric loss, ohmic conductivity, and viscous loss. Eachnplate is driven by a thickness-directed electric field, and all stacknelements are connected electrically in series. Functionally gradientnsingle plates and composites are readily modeled by the network, to andesired precision, using a sequence of circuit elements representingnstepwise variations in material properties and layer thicknesses.nSimulations of RAINBOW (reduced and internally biased oxide wafer)nceramics are given