Investigations on non-linear temperature-dependent electro-mechanical response of 1-3 type piezocomposites

An investigation on temperature-dependent behaviour of 1-3 piezocomposites is carried out under electro-mechanical coupled loading condition for different fiber volume fractions and bulk piezoceramics. Effective properties of 1-3 piezocomposite are measured using resonance based method for different operating temperatures. A simple homogenization technique is proposed for predicting the effective properties of 1-3 piezocomposites at elevated temperatures. A thermodynamically consistent uni-axial non-linear constitutive model is developed to predict thermo-electro-mechanical behavior of 1-3 piezocomposites. The predicted effective properties are incorporated in the proposed uni-axial model. The responses of piezocomposites subjected to electric field and mechanical stress are calculated and compared with experimental observations for room and elevated temperatures.