Abstract
Adhesive bonding is widely used in the joining of metals and carbon fiber-reinforced plastics (CFRPs). Ultrasonic vibration was used to improve adhesive bonding of CFRP/Al alloy joints grafted with silane coupling agent, and the effect of the ultrasound on the bonding was studied. The surface of Al alloy was treated with a silane coupling agent, and then the ultrasonic vibration was applied on the adherend during the adhesive bonding process. The shear strength was tested, and the mechanism was analyzed by scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FTIR). It is found that the ultrasonic assisting can further promote the bonding of the Al alloy and the adhesive. For the test joins, the shear strength was increased by 267.50% using the silanization treatment plus the ultrasonic assisting. The ultrasonic assisting promoted the grafted epoxy group to react with the adhesive more sufficiently at the Al/adhesive interface by causing micro-mixing and intensified molecule collision, and thus more chemical bond was formed. Under the ultrasonic action, the interface and the adhesive layer became tighter owing to the impact contact at the interface and the oscillating flow in the adhesive layer. The ultrasonic vibration assisting increased the bonding strength by promoting the chemical bond and improving physical morphology.
Highlights
Development of the aerospace industry and automobile industry, requiring light weight, high reliability, and good dimensional stability, promotes the application of carbon fiber-reinforced plastics (CFRPs) and light metal materials, such as Al alloy [1,2,3,4]
Bonding stress of an adhesive joint can be evenly distributed throughout the bonding area, while the traditional joining approaches damage the continuity of load-carrying carbon fibers by puncturing [5,6,7]
Ultrasonic vibration was used to improve the adhesive bonding of CFRP/Al alloy joints grafted vibration was used to improve the adhesive bonding of CFRP/Al alloyBy joints grafted with Ultrasonic silane coupling agent
Summary
Development of the aerospace industry and automobile industry, requiring light weight, high reliability, and good dimensional stability, promotes the application of carbon fiber-reinforced plastics (CFRPs) and light metal materials, such as Al alloy [1,2,3,4]. Compared with conventional mechanical joining approaches, such as bolting and riveting, adhesive bonding stands out for its small stress concentration and light weight. Bonding stress of an adhesive joint can be evenly distributed throughout the bonding area, while the traditional joining approaches damage the continuity of load-carrying carbon fibers by puncturing [5,6,7]. Pantelakis and Tserpes [8] discussed the development and challenge of the adhesive bonding technology for composite materials in aircraft structure and proposed a numerical design method for bonding composite materials to Al alloy
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
