Overlapped repair performance for carbon-PPS composites in vacuum-assisted thermal bonding

摘要

An overlapped repair with a continuous bonding area, was applied to carbon-PPS thermoplastic composites, and their strength recovery rate and failure behavior under mechanical loading were analyzed. This overlapped model has been designed to prevent the common and fundamental failures in conventional repair technologies through utilization of the volume fraction properties of continuous fibers. The same material was used for the parent and repair, and adhesion occurred via reversible thermal properties of the thermoplastic PPS polymer, without using additional adhesives. Under tensile and flexural loading, thickness ratios of 30% and 50% (damaged depth to the total thickness of the laminate) resulted in high strength recovery rates of 96% and 94%, respectively. The overlapped, bonded area on the surface of the parent material is the path of external load transfer between the parent and repair materials, maintaining uniform stress dispersion and increasing the fracture resistance.