2021 Fiscal Year Final Research Report
Experimental study of phase transformation behavior of steel subjected to pre-plastic deformation and construction of elastic-plastic constitutive model
| Project/Area Number |
19K04067
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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 18010:Mechanics of materials and materials-related
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
Oshita Kenichi 東京農工大学, 工学(系)研究科(研究院), 助教 (60334471)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 相変態 / 変態塑性 / 構成式 |
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| Outline of Final Research Achievements |
To estimate the effect of pre-plastic deformation of austenitic phase on transformation plasticity, deformation behavior of phase transformation in S45C and SCM440 steel were measured. Furthermore, the equivalent plastic strain-dependent transformation plastic constitutive equation considering the influence of pre-stress in austenitic phase was constructed based on the test results.
The simple simulation of the hot-pressing process was performed using this equation. The calculated transformation plastic behavior using the proposed equation is more accurate than the ones using the conventional constitutive equation.
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| Free Research Field |
固体力学
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| Academic Significance and Societal Importance of the Research Achievements |
予塑性変形を受けた鋼材の多軸応力における変態塑性挙動に関する実験的な知見はこれまで単軸状態で得られるデータとそれを利用した材料モデルを再検討する観点においても重要な役割を果たすものと思われる．さらに得られた材料モデルの基づくシミュレーションにより成形不具合の予測精度が向上し，試行錯誤的なものづくりから試行錯誤レス（トライレス）への移行が促進される．
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