On the design of a piezoelectric self-sensing smart composite laminate

The structural health monitoring of composite laminates is a rapidly emerging need in applications. Different real-time sensors integrated into have been proposed, such as fiber Bragg gratings and piezoceramics. However, their presence negatively affects the mechanical properties hosting laminate. This work proposes non-invasive method for piezoelectric functionalization by interleaving lead zirconate titanate micrometric powder between glass-fiber-reinforced polymer plies. effects different volume fractions on electromechanical were evaluated terms electrical response laminate inherent strength. demonstrated an sensitivity value that was up to 439% higher compared with embedded commercial disk (12.4 V/kN versus 2.3 V/kN). Impact tests revealed resistance interleaved comparable pristine laminates, whereas fragile leads delamination. Furthermore, analytical model proposed predict voltage coefficient g33 function properties, volumetric fractions, polarization process. matched experimental coefficients (R2=0.97), demonstrating its capability behavior composites define design guidelines.