Stress accurate framework for the numerical simulation of FSW processes
- Dialami N. ,
- Chiumenti M. ,
- Cervera M. ,
- et al
- Dialami N. ,
- Chiumenti M. ,
- Cervera M. and
- Agelet de Saracibar C.
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Numerical simulation of the friction stir welding (FSW) process was undertaken by means of an arbitrary-Lagrangian-Eulerian (ALE) formulation and a fully coupled thermomechanical analysis was performed to account for the heat flux generated by plastic dissipation in the stir zone and frictional dissipation at the contact interface. The methodology was developed by dividing the computational domain into the workpiece (defined by rigid viscoplastic behaviour in the Eulerian framework), the pin (Lagrangian framework) and the stir zone (ALE formulation). The nonlinear stress field encountered in FSW processes was described by a finite element method based on a three-field mixed formulation. Tracers were used to visualise material flow around the pin. The method was illustrated with three examples: 3D transient coupled thermomechanical simulation of the FSW process, the effect of input process parameters on weldment quality, and 3D FSW simulation using a threaded pin. Experimental results were obtained for AA 2195-T8 aluminium alloy specimens.
10th International Symposium, 20-22 May 2014, Session 9B: Modelling II, Paper 03
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