Abstract
In the present study, microscopic damage progress in filament-wound carbon fiber reinforced plastics (CFRP) hoop-wrapped vessels with three different laminate thicknesses subjected to out-of-plane loading were investigated. Impact tests were conducted to investigate the effect of laminate thickness on the microscopic damage progress using a drop-weight testing device. Impact loading caused fiber damage under impact point and delamination along hoop and axial direction in the all types of FW-CFRP vessels. The depth of fiber damage became larger in thicker CFRP layer. On the other hand, damage depth ratio became smaller with increasing laminate thickness, similar to absorbed energy. These results prove that the FW-CFRP vessels with thicker CFRP layers are superior in the impact resistance.
