Enhanced friction model for Friction Stir Welding (FSW) analysis: Simulation and experimental validation

摘要: Abstract Friction is one of the main heat generation mechanisms in Stir Welding (FSW). This phenomenon occurs between pin and workpiece as rotating tool moves along weld line. An accurate friction model essential for obtaining realistic results a FSW simulation particular temperature, forces torque. In this work, modified Norton's law developed. The suggested enhanced aims at providing not only temperature field but also does exclusively relate frictional shear stress to sliding velocity; conversely it takes into account effect non-uniform pressure distribution under shoulder, latter has an important role process generation. Longitudinal, transversal vertical torque are numerically calculated. reflected these forces. particular, leads more estimation longitudinal comparison with obtained using former models. successfully validated by experimental measurements provided industrial partner (Sapa). analysis performed material characterization, calibration and, generally, assessment overall numerical strategy proposed simulation.