Computational investigation on the periodic phenomena around a threaded pin during friction stir welding
- Chen G.Q. ,
- Shi Q.Y. ,
- Zhu Y.C. ,
- et al
- Chen G.Q. ,
- Shi Q.Y. ,
- Zhu Y.C. and
- Wang X.B.
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Periodic material phenomena around a threaded pin in friction stir welding (FSW) were investigated with a fully transient thermomechanically coupled numerical simulation, in which the transient motion of the threaded pin was included in the computation by fully transient control of the mesh. Butt joints in Al-Mg-Zn alloy plates (thickness 6 mm) were fabricated by FSW at a tool rotational speed of 800 rpm and a travel speed of 100 mm/min. Workpiece temperature was measured by thermocouples embedded in both advancing and retreating sides at various distances from the welding centreline. Numerical simulations based on computational fluid dynamics were undertaken to study the periodic variation of temperature, flow rate and strain rate in the vicinity of the threaded pin. The stronger variation of flow variables on the lower part of the pin was attributed to variation of the contact condition caused by tool rotation.
11th International Symposium, 17-19 May 2016, Session 2B: Modelling I, Paper 05
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