Investigation of the Effect of Fiber Reinforcement on Adhesively Repaired Composite Plates

In this study; fiber reinforcement effect on the circular hole perforated adhesively patch repaired woven glass fiber reinforced composite plates investigated with experimental study. The 8 layered woven glass fiber reinforced composite plates were using as composite plates and external patch. The fiber reionforcement angle of composite and external patch were changed as 0o, 15o, 30o and 45o. The circular hole in the center of composite plate was repaired with external patch and Loctite 9466 adhesive. The failure load was determined with static tensile tests. The repair performance was compared with un-perforated and un-repaired composite plates failure strength. As a result of the experimental studies; it was determined that the applied repair treatment increased the failure loads by 34% to 102% compared to notched plates. In addition, it was determined that the change in the patch fiber reinforcement angle was more effective on the failure loads. The largest failure loads were obtained for the plate repaired with a 30o fiber reinforcement angle patch compared to the notched plates.