J. Phys. IV France 120 (2004) 677-680
Modelling friction stir welding with thermally coupled fluid dynamicsD. Schmitter and I.M. Zylla
University of Applied Sciences Osnabrueck Dep. of Material Sciences and Chemical Engineering Albrechtstr. 30, 49076 Osnabrueck, Germany
The computational fluid dynamics approach for high velocity deformation processes as friction welding  or friction stir welding can successfully predict certain process aspects including microstructure development, if the thermal behaviour is included properly. We model the solid state material flow in the thermomechanically affected zone of the friction stir process using the Navier Stokes equations for an incompressible non Newtonian fluid field representing the ideally plastic material movement. Viscosity is related to the ideally plastic flow stress depending on temperature and strain rate.
© EDP Sciences 2004