Experimental and theoretical investigation on the thermo-electro-elastic properties of Macro-Fiber Composites (MFC)

The effective thermo-electro-elastic properties of Macro-Fiber Composites (MFC) are evaluated by means of an analytical model based on ‘equivalent layered approach’ using the concepts of ‘rule of mixtures’ and ‘series and parallel capacitance theory’. To account for the complex electric field distribution and the constituents shape and position, a numerical model based on finite element calculations is developed using ‘unit-cell approach’. The piezoelectric charge constants of MFCs are experimentally evaluated by applying electrical load in various thermal environment (27 °C to 70 °C). The proposed models are validated with the results available in literature, experimental values and the data from the manufacturer. Also, effect of thermal environment on the effective constants of MFCs for various volume fraction of piezoceramic phase is investigated.