Finite element modelling on time dependent ferroelectric behaviour of 1-3 piezocomposites

Experiments are conducted to measure the effective properties and also the time dependent behaviour of 1-3 piezocomposites and bulk piezoceramics subjected to cyclic electric field at room temperature under quasi static loading condition in the non-linear regime. Experimental dielectric and butterfly hysteresis show that 1-3 piezocomposite exhibits the time dependent behaviour. Hence a viscoelastic based numerical model has been proposed to predict the time dependent effective properties of 1-3 piezocomposites and bulk piezoceramics. The predicted effective properties are incorporated in the proposed 3D finite element based micromechanical model to predict the time dependent non-linear electromechanical behaviour of 1-3 piezocomposites and compared with experimental observations. The experimental and simulated results show that the presence of epoxy polymer constituent in 1-3 piezocomposite has an influence on the non-linear time dependent electromechanical response of 1-3 piezocomposite.