Multiscale model and experimental study of damage in piezoelectric fiber-based composite
The ability of piezoelectric materials to couple mechanical and electrical properties extends its role in Structural Health Monitoring (SHM) systems where it can be used both as a sensor and an actuator. Piezoelectric Fibre Composites (PFCs) offer better integrity and higher-ductility for SHM purposes of composite structures. Nevertheless, the electromechanical behaviour of PFCs remains an open topic for research. In the current study, a micromechanical model based on transformation field analysis been used to quantify the overall material properties of electrically active composite structure, where the homogenized structural properties can be calculated. After, Finite Element Method (FEM) been utilized to study the modal behaviour of a more complex structure of PFCs Bimorph (PFCBs) based on the aforementioned micromechanical model. Furthermore, the proposed multi-scale model been validated toward an experimental modal analysis of PFCBs pristine sample. Damage been introduced to the experimental samples through introducing delamination between the PFC lamina and the supporting steel strip. Shift in the natural frequencies and the corresponding electrical response due to the delamination been reported.
Shalan, K.M.; AbdelMeguid, M.E.; Hatem, Tarek; and Bahei-El-Din, Yehia, "Multiscale model and experimental study of damage in piezoelectric fiber-based composite" (2014). Centre for Advanced Materials. 8.