Development of Damage Model for Estimation of the Effect of Strain HIstory and Heterogeneous Microstrucure on Ductile Failure
| Project/Area Number |
24560132
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Production engineering/Processing studies
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| Research Institution | Osaka University |
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Principal Investigator |
OHATA Mitsuru 大阪大学, 工学(系)研究科(研究院), 准教授 (20294027)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 延性 / 成形限界 / 損傷 / 複合組織鋼 / シミュレーション / 歪履歴依存 / 不均質組織 / 延性損傷 / ひずみ履歴 / 二相組織鋼材 / 不均質 / 損傷モデル / バウシンガー効果 / 三次元数値解析 / 福相組織鋼材 / 延性破壊限界 / 数理損傷モデル / バウシンガー特性 / 複相組織鋼材 / 延性損傷限界 |
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| Outline of Final Research Achievements |
3D micro-structural FE-model was developed for analyzing the stress/strain localization behaviors by micro-structural strength mismatch. Ductile damage model for reproducing damage evolution up to micro-void/micro-crack formation was also propsed taking the "Baushinger effect" of the materials into account. The combination of the 3D micro-structural FE-model and the proposed numerical damge model was verified to predtic effect of strain history and volume fraction of a second phase of two-phase steel on dcutile fracture limit. This numeriacl simulation was found to correlate micro-structural characteristics with mechanical properties including stress-strain curve and strain history effect on dcutile failure of two-phase steel.
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Report
(4 results)
Research Products
(10 results)
