Measurement of Material Properties at Heating-Cooling for Residual Stress Analysis in Arc Welded Lap Joints of High Strength Steel Sheets
高張力鋼板の昇降温時における材料特性の測定とアーク溶接重ね継手の残留応力解析
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- Publication code
- 20244530
- Paper/Info type
- JSAE Transaction
Vol.55 No.5
- Pages
- 999-1004(Total 6 p)
- Date of publication
- Sep 2024
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
| Category(J) | 論文 Translation |
|---|---|
| Category(E) | Paper |
| Author(J) | 1) 大西 洋一郎, 2) 佐藤 健太郎, 3) 麻 寧緒, 4) 楢崎 邦男, 5) 安田 功一 |
| Author(E) | 1) Yoichiro Ohnishi, 2) Kentaro Sato, 3) Ninshu Ma, 4) Kunio Narasaki, 5) Koichi Yasuda |
| Affiliation(J) | 1) JFEスチール，大阪大学, 2) JFEスチール, 3) 大阪大学, 4) 大阪大学, 5) 大阪大学，JFEテクノリサーチ |
| Abstract(J) | 高強度鋼板のアーク溶接重ね継手の残留応力を正確に解析するため、昇温および降温時の材料特性を測定する方法を開発した。数値解析により降温時の材料特性を用いた残留応力は昇温時と降温時の両方で測定した材料特性を用いた場合と近く、溶接方向の引張残留応力は試験片への切断で最大約60%解放されることを確認した。 Translation |
| Abstract(E) | To precisely analyze residual stress in arc welded lap joints of high strength steel sheets, a method to measure material properties on both heating and cooling processes was developed. Then welding residual stresses in arc welded lap joints were analyzed by thermal elastic-plastic finite element method (FEM) using measured material properties on heating or cooling or both, respectively, for investigation of their effect on accuracy. The maximum temperature distribution on the surface of heat affected zone (HAZ) was measured and well predicted by welding thermal conduction analysis. When the material properties measured on heating only or cooling only or both were, respectively, used in thermal elastic-plastic FEM, the analyzed results showed that the distribution characteristics of welding residual stresses in arc welded joints of 780MPa high strength steel sheets are similar and their magnitude is different. The analyzed residual stress using material properties measured on cooling is closer to that using those measured on both heating and cooling. It was also confirmed by both analysis and measurement that the maximum longitudinal tensile residual stress in an arc welded original lap joint was released about 60% in the cut specimen for tensile-shear strength test and the transverse residual stress changed greatly in its distribution characteristics. |
