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Abstract
A finite element pseudosteady state thermal model takes the mechanical power as input data while distributing the total power input between surface and volume heat sources. A simple model for the material flow around the tool has been developed in order to take heat convection into account based on the shape of the thermomechanically affected zone. The model is assessed for a large number of different welding parameters. Special attention is given to the type of contact at the tool/workpiece interface, i.e. sliding, sticking or both and at the workpiece backing plate interface. The rotational material flow creates asymmetry in the temperature distribution between the two sides of the weld.
