Finite Element Studies on Friction Stir Welding Processes of Polyethylene Plates

One of the interesting state-of-the-art approaches to welding is theprocess offriction stir welding (FSW). In comparison with the fusion processes, FSW is an advantageous method as it is suitable for the non-fusion weldable allays and polymeric materials joining. Regarding the materials pure solid state joining, it also provides joints with leas distortion and enhanced mechanical properties. In the present work. a three-dimensional (3D) model based on finite element analysis was applied to study the thermal history and thermomechanical procedure in friction stir welding of high density polyethylene plate. The technique includes the tool mechanical reaction and the weld material thermomechanical procedure. The considered heat source in the model, includes thefriction among three items: the material, theprobe and the shoulder. Finally, the model was validated by measuring actual temperatures near the weld nugget using thermocouples, and good agreement was obtained for studied materials and conditions.