| Project/Area Number |
23K13556
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 26030:Composite materials and interfaces-related
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| Research Institution | The University of Tokyo |
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Principal Investigator |
WAN YI 東京大学, 大学院工学系研究科(工学部), 講師 (90816844)
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| Project Period (FY) |
2023-04-01 – 2026-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2025: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2024: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2023: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | high-performance CFRP / internal geometry / mechanical property / failure criteria |
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| Outline of Research at the Start |
The stochasticity and variations in the mechanical properties of HDFC are unpredictable using the current failure criteria, which is the most urgent problem that needs to be solved to extend its application potential.
In this research proposal, novel failure criteria based on the complexity of the internal morphology of HDFC will be established. The potential and accelerate the social implementation of HDFC will be extended in both the view of material research and industrial applications of composite materials.
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| Outline of Annual Research Achievements |
Over the past year, research on HDFC has been conducted from two primary perspectives.
The first aspect involves detailed observations of internal geometry during fracture and failure under loading conditions. An advanced in-situ X-ray micro-CT facility was utilized to acquire the internal geometries under various loading conditions until the initial fracture occurred. Additionally, a specially developed digital volume correlation method was employed to analyze the 3D strain distribution and its correlation with the loading conditions and microcrack generation.
The second aspect focuses on modeling the stochastic features of HDFC, particularly concerning sheet molding compounds. The stochastic properties are characterized by sheets randomly generated using the Monte Carlo method.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Good results have been collected from the current experiments. The correlation between the internal geometry, strain distribution, and fracture initiation has been studied to aid in developing precise modeling methods for failure prediction.
Additionally, stochastic modeling has been conducted, and an extension of the model from elastic characterization to failure and dynamic features is currently underway.
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| Strategy for Future Research Activity |
In the next phase, extended in-situ X-ray micro-CT experiments with different HDFC samples will be conducted to assess the reliability of the data for modeling purposes. Given that only a few institutions worldwide have the capability to perform these experiments, it is crucial to establish the experimental plan promptly.
Furthermore, the data obtained from the in-situ X-ray micro-CT experiments and digital volume correlation analysis will be integrated into the stochastic model to verify its applicability.
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