| 3D Finite Element Numerical Simulation of Residual Stresses on Electron Beam Welded BT20 Plates |
| |
| 作者姓名： | Lixing HUO Furong CHEN Yufeng ZHANG Li ZHANG Fangjun LIU and Gang CHEN
Welding Division College of Materials Science and Engineering Tianjin University Tianjin China
Aviation Techniques Institute of Beijing Beijing China |
| |
| 作者单位： | Lixing HUO，Furong CHEN，Yufeng ZHANG，Li ZHANG，Fangjun LIU and Gang CHEN
1)Welding Division，College of Materials Science and Engineering，Tianjin University，Tianjin 300072，China
2)Aviation Techniques Institute of Beijing，Beijing 100024，China |
| |
| 摘 要： | A three-dimensional finite-element model (FEM) used for calculating electron beam (EB) welding temperature and stresses fields of thin plates of BT20 titanium has been developed in which the nonlinear thermophysical and thermo-mechanical properties of the material has been considered. The welding temperature field, the distributions of residual stresses in as-welded (AW) and electron beam local post-weld heat treatment (EBLPWHT) conditions have been successfully simulated. The results show that: (1) In the weld center, the maximum magnitude of residual tensile stresses of BT20 thin plates of Ti alloy is equal to 60%- 70% of its yield strength σs. (2) The residual tensile stresses in weld center can be even decreased after EBLPWHT and the longitudinal tensile stresses are decreased about 50% compared to joints in AW conditions. (3) The numerical calculating results of residual stresses by using FEM are basically in agreement with the experimental results. Combined with numerical calculating results, the
|
3D Finite Element Numerical Simulation of Residual Stresses on Electron Beam Welded BT20 Plates |
| |
| Lixing HUO,Furong CHEN,Yufeng ZHANG,Li ZHANG,Fangjun LIU and Gang CHEN
Welding Division,College of Materials Science and Engineering,Tianjin University,Tianjin ,China
Aviation Techniques Institute of Beijing,Beijing ,China.3D Finite Element Numerical Simulation of Residual Stresses on Electron Beam Welded BT20 Plates[J].Journal of Materials Science & Technology,2004,20(1):117-120. |
| |
| Authors: | Lixing HUO Furong CHEN Yufeng ZHANG Li ZHANG Fangjun LIU Gang CHEN |
| |
| Affiliation: | Welding Division, College of Materials Science and Engineering, Tianjin University, Tianjin 300072, China |
| |
| Abstract: | A three-dimensional finite-element model (FEM) used for calculating electron beam (EB) welding temperature and stresses fields of thin plates of BT20 titanium has been developed in which the nonlinear thermophysical and thermo-mechanical properties of the material has been considered. The welding temperature field, the distributions of residual stresses in aswelded (AW) and electron beam local post-weld heat treatment (EBLPWHT) conditions have been successfully simulated.The results show that: (1) In the weld center, the maximum magnitude of residual tensile stresses of BT20 thin plates of Ti alloy is equal to 60%～ 70% of its yield strength σs. (2) The residual tensile stresses in weld center can be even decreased after EBLPWHT and the longitudinal tensile stresses are decreased about 50% compared to joints in AW conditions. (3)The numerical calculating results of residual stresses by using FEM are basically in agreement with the experimental results.Combined with numerical calculating results, the effects of electron beam welding and EBLPWHT on the distribution of welding residual stresses in thin plates of BT20 have been analyzed in detail. |
| |
| Keywords: | Electron beam local heat treatment Electron beam welding Titanium alloy Finite element method Residual stress |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《材料科学技术学报》浏览原始摘要信息 |
|
点击此处可从《材料科学技术学报》下载全文 |
