Delamination properties and in situ damage monitoring of z-pinned carbon fiber/epoxy composites

Carbon-fiber-reinforced composites with layer stacking structures are sensitive to delamination crack. To improve the interlaminar properties and further explore the capability of in situ damage monitoring of the laminate, CCF300 and CCF800 carbon fiber pins were selected to fabricate the z-pinned composites. Compared with the control sample, the G IC values of CCF300 and CCF800 z-pinned composites are increased by 398 and 378%, respectively....