It has long been a goal to produce a composite naval superstructure containing a metallic edge that can be easily welded to a metal decked vessel using conventional shipyard welding techniques such as arc welding. Production of metal to composite joint for naval vessels is in demand.
Comparing different hybrid joining methods, refill friction stir spot welding (RFSSW) is an excellent candidate as its peak process temperature is lower than the melting point of the base material, avoiding many fusion welding defects, such as hot cracks and high residual stress. However, the current application of RFSSW is limited to joining dissimilar metal workpieces.
The project examines the possibility of applying RFSSW, or similar stud forming methods, to join metal to composite with the assistance of numerical simulations to predict the performance and integrity of the hybrid joints.