EFFECT OF VARIATION OF AXIAL LOAD ON MATERIAL DEFORMATIONS AND TEMPERATURE DISTRIBUTIONS IN FRICTION STIR WELDING

Acta Metall Sin

2007, Vol. 43

Issue (8): 868-874 DOI:

Research Articles

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EFFECT OF VARIATION OF AXIAL LOAD ON MATERIAL DEFORMATIONS AND TEMPERATURE DISTRIBUTIONS IN FRICTION STIR WELDING

大连理工大学工程力学系

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. EFFECT OF VARIATION OF AXIAL LOAD ON MATERIAL DEFORMATIONS AND TEMPERATURE DISTRIBUTIONS IN FRICTION STIR WELDING. Acta Metall Sin, 2007, 43(8): 868-874 .

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Abstract Fully coupled thermo-mechanical model of friction stir welding is used to analyze the effect of axial load on friction stir welding process. Results indicate that the insufficient axial load leads to the failure of the friction stir welding. The material deformation on the top surface is affected by the rotation of both the welding pin and the shoulder, which causes that the material deformation on the top surface is higher than the one near the bottom surface. The material deformation is not symmetric to the welding line. The material deformation on the advancing side is higher than the one on the retreating side. The asymmetry of the material deformation can be weakened with the increase of the axial load. The maximum temperature of the welding plate during the friction stir welding process is increased with the increase of the axial load. The temperature field near the welding tool in the nugget zone can become more homogeneous when the axial load is increased.

Key words: Friction stir welding fully coupled thermo-mechanical model finite element method equivalent plastic

Received: 04 December 2006

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