TWI

The material point method based on NairnMPM software was employed to formulate a 2D model of elastoplastic material flow around a friction stir welding (FSW) tool probe and to examine 2D elastoplastic deformation and the frictional interaction at the tool to matrix interface. The model incorporated the Johnson-Cook material law to describe material constitutive behaviour and frictional contact and heat generation at the tool/matrix interface. The results obtained included thermal fields and plastic strain fields after rotational and translational motion of tool and clamps. Some limitations of the 2D model (such as the inability to deal with voids behind the probe) are discussed.

11th International Symposium, 17-19 May 2016, Session 5B: Modelling II, Paper 04