Cellular solids having soft-and-stiff characteristics
| Project/Area Number |
25709001
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Partial Multi-year Fund |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Osaka University (2016)
The University of Tokyo (2013-2015) |
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Principal Investigator |
TANAKA Hiro 大阪大学, 工学(系)研究科(研究院), 助教 (70550143)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥21,450,000 (Direct Cost: ¥16,500,000、Indirect Cost: ¥4,950,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Fiscal Year 2013: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
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| Keywords | 柔剛特性 / 可変機構 / 8回回転対称 / 正方セル / 変形遷移 / 分岐現象 / ポアソン比 / セル構造体 / 8回回転対称性 |
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| Outline of Final Research Achievements |
It enables us to introduce a new mechanical design if structures potentially adjust their stiffness to reflect various changing circumstances. In this study, we proposed the concept of soft-and-stiff characteristics that the stiffness is passively switched according to different load conditions, and engaged the basic research going forward into its creation. Concretely, we numerically clarified that a specific cellular solid exhibits a deformation transition as increasing the internal stiffness and the overall stiffness changes dramatically during the transition. It was also proved that a similar transition mechanism exists within a periodic linked structure with low degrees of freedom. We in parallel developed the orthotropic laminated cellular structures retaining strong auxeticity in the stacking direction as a part of optimized structural system enhancements.
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Report
(5 results)
Research Products
(28 results)
