Adhesively Bonded Composite Joints in Aerospace Application

Abstract

The use of adhesively bonded joints is significantly increasing in aerospace structures such as wings, frames, spoilers, tails and fuselage due to their advantage over mechanical fasteners. They are driven by the necessity for lightweight structures, exceptional sealing ability and design flexibility. However, conventional joint topology like single lap joints prompts higher peel stress, resulting in lower joint strength, and promotes early failure during their service. These disadvantages in composite laminates affect the efficacy and performance of full-scale components where joining is necessary. The current study aims to give insight on parameters that severely affect the performance of adhesive joints, such as the composite bonding process, surface preparation, material geometry (adhesive thickness, joint design) and material properties (adhesive and adherend material). The influence of environmental conditions such as temperature and humidity on joint durability are also deliberated briefly in this current review.