Experimental investigation and modelling of piezoelectric actuator hystereses for FE analysis of smart structures

摘要

This paper presents a method to predict the actuation strain in a smart cantilever beam numerically with the help of experimental parameter identification in combination with a finite element code. The hysteretic electric field-strain relation of an unconstrained laminar piezoceramic actuator is measured directly by Michel-son interferometry. The observed nonlinear material behaviour is modelled by a classical Preisach model. This is used for the determination of the piezoelectric coupling coefficient, which depends nonlinearly on the strains. For the numerical investigation of the active structure a finite element code is interacting in an iterative procedure with the Preisach model.