| Project/Area Number |
24360175
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
Takashi Kyoya 東北大学, 工学(系)研究科(研究院), 教授 (00186347)
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| Co-Investigator(Kenkyū-buntansha) |
KATO Junji 東北大学, 大学院工学研究科, 准教授 (00594087)
TERADA Kenjiro 東北大学, 災害科学国際研究所, 教授 (40282678)
中畑 和之 愛媛大学, 理工学研究科, 准教授 (20380256)
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| Co-Investigator(Renkei-kenkyūsha) |
NAKAHATA Kazuyuki 愛媛大学, 理工学研究科, 准教授 (20380256)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2012: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
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| Keywords | micro-crack / topology optimization / inverse-homogenization / non-destructive / simulation / マイクロクラック / トポロジー最適化 / 逆均質化法 / 非破壊検査 / シミュレーション / 非破壊検査法 / 波動伝搬解析 / マルチスケール解析 |
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| Outline of Final Research Achievements |
This research takes numerical approaches; EFIT and the inverse homogenization method using the finite element method; aimed at identifying the distribution of micro-cracks, which cause degradation of, and damage to, structures. The research proposed a series of methods using optimization algorithms to calculate the micro-crack distribution with material stiffness equivalent to that of the given anisotropic material, and examined how well the methods modeled the distribution. While previous studies on non-destructive testing simulation by means of topology optimization are able to identify only a few damaged parts in material, this method is able to reproduce the directions of damaged parts, micro-cracks: this improvement is a step forward in the development of this field.
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