ABSTRACT
This chapter describes the two most common joining methods used in Polymer Matrix Composites (PMCs), namely, mechanical fastening and adhesive bonding. It describes joining of thermoplastic matrix composites using fusion bonding. The chapter addresses the repairing techniques of service-damaged PMCs. For thermoset matrix composites, the basic joining methods are mechanical fastening and adhesive bonding. Mechanical fastening and adhesive bonding are also used with thermoplastic matrix composites. The mechanical fasteners used with PMCs fall into three categories: bolts, rivets, and pins. Adhesive selection depends on a number of factors, such as the substrates to be bonded, adhesive application method, surface preparation requirement, adhesive bonding time, operating environment, stress levels, and cost. The quality and strength of bonded joints depend on the number and types of defects in bondline. Cocuring is a process in which curing and bonding are simultaneously achieved in the same curing cycle. The most common fusion bonding techniques for thermoplastic matrix composites are vibration welding and ultrasonic welding.
