Investigation of the Mechanical Performance of Carbon Fiber Reinforced Polymer and Aluminum 2024 Alloy Lap Joints

Composite materials and lightweight aluminum alloys are in high demand for applications necessitating a balance of low weight and high strength, particularly in industries like aerospace and automotive. However, due to structural requirements, a combination of materials is often needed, leading to the need for effective joining methods. Bolted and riveted joints, while commonly used, introduce stress concentrations around the joints and holes. In contrast, adhesive joints emerge as the superior choice, ensuring even stress distribution and exhibiting excellent damping properties. This method proves especially advantageous for dissimilar material unions, eliminating the necessity for drilling holes. The present study focuses on a single lap joint, employing adhesive bonding to unite Carbon Fiber Reinforced Plastic and Aluminum Alloy 2024 adherends. Conforming to ASTM standards D5868 and D1002, specimens will be meticulously crafted and subjected to controlled testing conditions. The experiments have been meticulously recorded using a camera, with the application of Digital Image Correlation techniques for precise joint analysis.