ABSTRACT
Failure loads and failure modes were generated and compared with the following parameters: scarf angles, roughness of grind tool and a number of external plies. Results showed that scarf angle was the critical parameter and the largest tensile strength was observed with the smallest scarf angle. Adhesively bonded scarf repairs provide a significant recovery of residual strength in damaged composite structure and are compared with external patch repairs, and scarf repairs have relatively high levels to minimize aerodynamic disturbance. Campilho investigated the tensile behavior of adhesive-bonded carbon/epoxy scarf repair using scarf angles ranging from 2° to 45°. Two distinct Plain weave carbon fiber fabric prepreg plied were used in the construction of the parent laminate and the repair patch. The repair specimens stiffness reduces as the adhesive modulus is much lower than the parent laminate. Besides, stiffness reduction experienced by the repairs prior to failure was caused by the softening of the adhesive layer at the bond edges.
