The role of cracks on the out-of-plane rotations, plasticity and fracture in kirigami structures
| Project/Area Number |
18K18065
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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 60100:Computational science-related
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
Barbieri Ettore 国立研究開発法人海洋研究開発機構, 付加価値情報創生部門(数理科学・先端技術研究開発センター), 主任研究員 (10816284)
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| Project Period (FY) |
2018-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | kirigami / meshless / large deformations / large rotations / plates / analytical solutions / modelling / buckling / Kirigami / Fracture / Mechanics / Computational / Plasticity |
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| Outline of Final Research Achievements |
With my simulations, I clarified that the out-of-plane rotations could not emerge naturally as a consequence of the introduction of the cuts. Instead, they represent a mechanical instability that can be obtained only with a buckling analysis. Another achievement was the implementation of a large rotation plate theory.
This theory led me to obtain unforeseen results in folding of plates, which are akin more to origami structures. Folds in a sheet can be seen as discontinuities in the rotations, just like cracks are discontinuities in the displacements. This idea brought me to publish two papers in this field and opening up a new line of research. Finally, a significant accomplishment was the actual use of my computational and theoretical results in a real application. My collaborators manufactured multifunctional silk kirigami. My model guided and supported the experimental findings, provided insights into the deformation and fracture, including the presence of self-shielding cuts.
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| Academic Significance and Societal Importance of the Research Achievements |
切り紙の力学についての研究は発展途上であり、特にその変形様式によって、伸縮許容量がどのように変化するのかを理解することが大きな課題。本研究では、数値シミュレーションにより伸縮許容量を適切に見積もることが出来た。これらの成果は査読付き論文2編にて発表し、学術的に評価を受けた。また、得られた知見の応用範囲は広くその対象は伸縮可能な電子機器、エネルギー貯蔵装置、ヒーター、マイクロ波吸収服などのデバイスなど多岐に渡り、アメリカとの国際共同研究における製造技術開発にも貢献した。
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Report
(3 results)
Research Products
(14 results)
