Development of fiber-based piezoelectric sensors for the load monitoring of dynamically stressed fiber-reinforced composites

Abstract Continuous load monitoring of fiber-reinforced composites represents a complex challenge for the composite sector. In this paper, development and characterization piezoelectric sensors structural health applications based on polyvinylidene fluoride (PVDF) are presented. The basic sensor structures melt spun bicomponent filaments in core-sheath configuration. core is volumetric mixture polypropylene (PP) Pre-Elec PP, PP-compound modified with carbon black. sheath made PVDF. Three variants increasing ratio (50 vol.%, 60 vol.% 70 vol.%) manufactured analyzed by conducting optical resistance measurements as well tensile tests. subsequent process step, braided copper fine wires. PP braiding coaxial tricomponent yarn used inner outer electrode, respectively. By generating an electrostatic high voltage field between these electrodes, PVDF interlayer subjected to contact polarization initialize effect. characteristics thereby sensory potential produced yarns quantified fiber scale investigating their behavior during cyclic results different compared each other evaluating measured signal function induced stresses.