FE modelling of mechanical tensioning for controlling residual stresses in friction stir welds
- Richards D.G. ,
- Prangnell P.B. ,
- Withers P.J. ,
- et al
- Richards D.G. ,
- Prangnell P.B. ,
- Withers P.J. ,
- Williams S.W. ,
- Wescott A. and
- Oliver E.C.
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An finite element method (FEM) model, considering variables such as tensioning level, heat input and sheet geometry but ignoring mechanical tool effects, was developed to investigate the efficacy of the mechanical tensioning technique for controlling residual stresses in welded joints of AA-2024 alloy sheets (thickness 3 mm) made by friction stir welding (FSW). The FEM model was implemented in ABAQUS, and heat source calibration was achieved by matching thermal profiles from infrared imaging. Tensioning effects were considered under the effects of varying tool heat input power and tool traverse speed. Residual stress distributions were calculated for asymmetric welds and non-rectangular sheet geometries. Simulation results were compared with neutron diffraction measurements.
6th International Symposium, 10-13 Oct 2006, Session 5B: Residual Stresses, Paper 01
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