Coupled model for the determination of full electroelastic sets of 1–3 piezocomposites with various pillar shapes

Due to their enhanced properties with respect to conventional piezoelectric ceramics, 1-3 piezocomposite materials are predominant in high performance transducer applications. The determination of their effective electroelastic modulus has been the subject of numerous investigations. Simple modeling of the thickness mode is well documented in literature, however precise simple modeling of the full effective modulus is less abundant. A coupled model is proposed to predict the complete electroelastic moduli of 1-3 piezocomposites. The main aim of this model is to deliver accurate effective elastic, dielectric and piezoelectric parameters while taking into account the internal geometry of the composite. Various piezoelectric pillar shapes and spatial distribution were tested to assess the effect on the effective parameters.