| Project/Area Number |
25420078
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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 | Institute of Physical and Chemical Research |
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Principal Investigator |
Sunaga Hideyuki 国立研究開発法人理化学研究所, 光量子工学研究領域, 研究員 (70442978)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAMURA Masato 国立研究開発法人理化学研究所, 光量子工学研究領域, 研究員 (00525595)
OTAKE Yoshie 国立研究開発法人理化学研究所, 光量子工学研究領域, チームリーダー (50216777)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKETANI Atsushi 国立研究開発法人理化学研究所, 光量子工学研究領域, 副チームリーダー (30222095)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | せん断加工 / 弾塑性FEM / 中性子計測 / 延性破壊 |
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| Outline of Final Research Achievements |
The simulation of fracture propagation is a highly nonlinear problem that is difficult to solve using elastoplastic FE codes, mainly because of the sudden change in the force equilibrium situation in fracture. Simulations of shearing processes of steel plates were carried out and the results showed good correlation with the experimental results. It was proved to be sufficiently robust and accurate to treat shear cutting.
A neutron diffraction measurement was performed to reveal microstructural aspects of the ductile fracture in ferritic steel. The diffraction patterns were continuously measured until the end of the fracture process. The measurement results showed that the volume fraction of the specified plane in lattices {110} for the axial loading direction increased almost proportionally to the material elongation during necking. The effect of the fracture was observed as a change in the volume fraction of {110} prior to the actual fracture.
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