| Numerical simulation of small section rectangular tube in parallel welding |
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| 作者姓名： | 王俊恒 高洪明 张广军 吴林 |
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| 作者单位： | State Key laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin, 150001. |
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| 摘 要： | The welding temperature field and deformation of parallel arrangement small-section rectangular tubes is calculated by using a non-contact model. After comparing the computed results with the experimentally measured results, it shows that there exist big errors when applying this model to the numerical simulation of small-section rectangular tube＇ s welding temperature field and deformation. Based on a simple analysis of the errors, a contact model is presented. The heat transfer and stress analysis between small-section rectangular tubes and clamping fixture are simulated by using direct constraints method, and then the laws of the temperature distribution, which coincide with experiment, are obtained. A further numerical analysis of the stress and deformation are made, it shows that a ＂T＂ shaped stress-field is formed in the vicinity of the weld. As the stress-field departs from the centroid of tubes＇, this leads to the small rectangular tubes not only have a longitudinal deflection, but also have a transverse bending and deformation.
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| 关 键 词： | 矩形管 接触点 应变能力 焊接技术 |
Numerical simulation of small section rectangular tube in parallel welding |
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| Wang Junheng,Gao Hongming,Zhang Guangjun,Wu Lin.Numerical simulation of small section rectangular tube in parallel welding[J].China Welding,2007,16(3):71-78. |
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| Authors: | Wang Junheng Gao Hongming Zhang Guangjun Wu Lin |
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| Affiliation: | State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin,150001 |
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| Abstract: | The welding temperature field and deformation of parallel arrangement small-section rectangular tubes is calculated by using a non-contact model. After comparing the computed results with the experimentally measured results, it shows that there exist big errors when applying this model to the numerical simulation of small-section rectangular tube's welding temperature field and deformation. Based on a simple analysis of the errors, a contact model is presented. The heat transfer and stress analysis between small-section rectangular tubes and clamping fixture are simulated by using direct constraints method, and then the laws of the temperature distribution, which coincide with experiment, are obtained. A further numerical analysis of the stress and deformation are made, it shows that a "T" shaped stress-field is formed in the vicinity of the weld. As the stress-field departs from the centroid of tubes', this leads to the small rectangular tubes not only have a longitudinal deflection, but also have a transverse bending and deformation. |
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| Keywords: | small-section rectangular tube contact direct constraints method strain deformation |
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