Abstract
Friction spot welding (FSJ) process is very complicated in the aspects of material flow, heat generation and joining mechanism. Compared with friction stir welding (FSW) process for butt joint, FSJ process is used to join two pieces of plate in the direction of thickness. Although there are several papers describing simulation models for FSW process, we can not find any papers relating to simulation models for FSJ process. In order to simulate FSJ process efficiently, an axis-symmetric two dimensional FEM model with adaptive re-meshing algorism is proposed. By using the proposed model, temperature distribution, joining shape of the transverse section including toe flash on the surface and hook on the joining interface, can be simulated. The simulated results are well agreed with those of experiment. Furthermore, effects of clamp position and stirring direction on material flow and joining shape are investigated.
