Sensing and drivingrnperformance of micro–nanornpiezoelectric fibre composites

摘要

The cellular model of 1-3-type piezoelectric fibre composites has been established and simplified to be a seriesrnparallel hybrid model, and the equivalent mechanical and electrical parameters of the characteristic cell with arnconstitutive relationship between the piezoelectric phase and polymer phase were analysed. By using the optimisedrndesign, 1-3 piezoelectric fibre composites were fabricated, and their sensing performance in both the vertical andrnhorizontal directions was tested. The results indicate that the highest output voltage is in the vertical directionrn(sensitive direction, i.e. the polarisation direction) with values more than two times higher than that in thernhorizontal direction (insensitive direction). By loading a direct-current high voltage, the actuation performance of thernpiezoelectric fibre composites was tested, and the results show that the value of the maximum strain generated inrnthe vertical direction was more than two times higher than that in the horizontal direction (insensitive direction).rnThese results indicate that 1-3-type piezoelectric fibre composites can offer good orthotropic sensing and drivingrnperformance.