2012 Fiscal Year Final Research Report
Fracture mechanics study on the reliability of sea transportation structures
| Project/Area Number |
22246108
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Naval and maritime engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
AIHARA Shuji 東京大学, 大学院・工学系研究科, 教授 (10373599)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHINARI Hitoshi 海上技術安全研究所, 上席研究員 (20167737)
SHIBANUMA Kazuki 東京大学, 工学系研究科(工学部), 助教 (30611826)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 材料 / 構造力学 |
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| Research Abstract |
Prevention of brittle fracture in large-scale sea transportation structures, such as mega-container ships, has been an urgent task because heavy-section steel plates are used in these structures. In the present study, experimental as well as numerical analyses were made for fast propagating brittle cracks. Reason to the discrepancy of the brittle crack propagation and arrest behaviors with crack length was clarified. Also, a numerical model was developed for analyzing crack propagation behaviors in welds with material and stress heterogeneities. These results are expected to contribute to the technology development for preventing and controlling brittle crack propagation in ship structures.
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