2021 Fiscal Year Final Research Report
Development of dislocation-density based crystal plasticity model for predicting the anisotropy in rolled sheet
| Project/Area Number |
19K05078
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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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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 結晶塑性 / 塑性加工 |
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| Outline of Final Research Achievements |
A dislocation density-based crystal plasticity model was used to predict the plastic anisotropy in aluminum alloy sheets. The crystal plasticity model was implemented into a commercial finite element software, and the cup drawing process was simulated. The equivalent strength of the dislocation interaction coefficients resulted in the predictions that agree with the experimental results. A procedure to modify the crystal orientations was proposed in order to improve the prediction accuracy further. These results were in good agreement with the experimental data and are better than the predictions based on a conventional macroscopic theory of plasticity.
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| Free Research Field |
塑性加工
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| Academic Significance and Societal Importance of the Research Achievements |
結晶塑性モデルを用いた塑性加工シミュレーションを実現したことは，技術の適用範囲の拡大ならびに産業界への技術移転を容易にするものであり，その価値は高い．結晶塑性モデルによる予測精度が巨視的塑性論よりも高いことは重要な結論である．つまり，本手法を適用することで，従来の解析精度よりも一段階精度の高い解析を実現できることを示した．本研究の成果によって，結晶塑性モデルに基づく成形シミュレーションが広く普及することが期待できる．
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