TWI

A thermal-pseudo-mechanical model, based on the use of material temperature-dependent yield stress as the driver for heat input, was proposed for heat generation in friction stir welding, and simulation results were compared with experimental temperature measurements and classical thermal models. A temperature-dependent heat source was implemented in an Eulerian model incorporating the workpiece, tool and backing plate, and the thermal model was developed in Comsol 3.4 based on experimental welding of AA 7075-T6 instrumented with thermocouples. Contour plots of maximum temperature and total heat generation are reported as functions of process parameters (rotational speed and welding speed).

7th International Symposium, 20-22 May 2008, 2B: Modelling 1, Paper 02