Abstract
Generally, the repair effectiveness of damages, such as delamination and transverse cracks, in fiber reinforced plastics has been evaluated based on the mechanical properties of specimens which include the repaired region. However, to discuss its effectiveness in detail, we should extract the repaired region from laminates. In this study, we tried to evaluate the effectiveness of repair using thermal fusion bonding (TFB) on the delamination generated by out-of-plane impact in carbon fiber reinforced polyamide 6 cross-ply laminate. Interlaminar shear test using double-notched specimen was also carried out to evaluate interlaminar shear strength at the region of repaired delamination, directly. As a result, the mechanical properties of region of repaired delamination was not recovered completely, while the delamination was closed geometrically by TFB in certain condition and the reflected wave from the crack in ultrasonic inspection was disappeared. In addition, it was possible to evaluate the shear strength in the region of repaired delamination by using interlaminar shear test using double-notched specimen.
