| Effect of viscosity on material behavior in friction stir welding process |
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| 作者单位： | State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering Mechanics，Dalian University of Technology，State Key Laboratory of Structural Analysis for Industrial Equipment，Department of Engineering Mechanics，Dalian University of Technology，State Key Laboratory of Structural Analysis for Industrial Equipment，Department of Engineering Mechanics，Dalian University of Technology，State Key Laboratory of Structural Analysis for Industrial Equipment，Department of Engineering Mechanics，Dalian University of Technology，State Key Laboratory of Structural Analysis for Industrial Equipment，Department of Engineering Mechanics，Dalian University of Technology，Dalian 116024，China，Dalian 116024，China，Dalian 116024，China，Dalian 116024，China，Dalian 116024，China |
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| 基金项目： | 国家自然科学基金;教育部长江学者和创新团队发展计划;国家重点基础研究发展计划(973计划) |
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| 摘 要： | 1 Introduction Friction stir welding(FSW) is a new solid-state joining process invented by TWI, in which joining of material is achieved without melting. The usual flaws such as slag-inclusions and porosity can be minimized or even can be eliminated in fr…
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| 关 键 词： | 机械关联模型 搅拌摩擦焊接 粘度 FSW |
| 收稿时间： | 2005-11-25 |
| 修稿时间： | 2006-05-08 |
Effect of viscosity on material behavior in friction stir welding process |
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| Authors: | ZHANG Hong-wu ZHANG Zhao BIE Jun ZHOU Lei CHEN Jin-tao |
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| Affiliation: | 1. Université Lille 1, Unité Matériaux Et Transformations, UMR CNRS 8207, 59655 Villeneuve dAscq, France;2. Université catholique de Louvain, Institute of Mechanics, Materials and Civil Engineering (iMMC), Louvain-la-Neuve, Belgium |
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| Abstract: | Temperature-dependent elastic viscoplastic material model was used for the numerical simulation of the friction stir welding process. The non-elastic response of the rate-dependent material in the large deformation problems was calculated by using the closest point algorithm. The numerical results show that the shape of the equivalent plastic strain looks like onion rings and the spacing of the rings is approximately equal to the forward movement of the tool in one rotation. The equivalent plastic strain is increased with the increase of viscosity coefficient due to the increase of friction stress in the pin-plate interface. The region which is influenced by the rotating tool is decreased with the decrease of viscosity coefficient. The radial and circumferential stresses in front of the pin are greater than the ones behind the pin. This difference can be reduced with the decrease of viscosity. |
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| Keywords: | rate-dependent model constitutive relationship radial return mapping algorithm friction stir welding |
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