Damage monitoring of conductive glass fiber/epoxy laminated composites under dynamic mixed-mode fracture loading

Damage monitoring of conductive glass fiber/epoxy laminated composites is performed by observing the electro-fracture response under dynamic mixed-mode fracture loading. A three-dimensional network generated in these embedding carbon nanotubes (CNTs) matrix and reinforcing short fibers (80 µm, 150 350 µm) between laminates. modified split Hopkinson pressure bar setup used to load open notch flexure (MONF) specimens. four-point probe technique coupled with a high-frequency data acquisition system employed capture electrical within process zone high speed video camera crack propagation. Due bending effect, decreasing trend resistance change observed before damage initiation no fibers. However, fiber reinforced show minimal due less amount CNTs them moreover did not their position during elastic deformation. After initiation, rate increase almost five times higher containing 80 µm than those µm.