2013 Fiscal Year Final Research Report
Improvement of the Fatigue Life Estimation for Large Welded Built-up Structures Based on the Estimation of Fatigue Crack Growth Histories
| Project/Area Number |
21676007
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| Research Category |
Grant-in-Aid for Young Scientists (S)
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| Allocation Type | Single-year Grants |
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| Research Field |
Naval and maritime engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Research Collaborator |
MURAKAMI Koji 九州大学, 大学院・工学府, 技術専門職員
NIWA Toshio (独)海上技術安全研究所, 研究員 (10208267)
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| Project Period (FY) |
2009 – 2013
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| Keywords | 疲労 / 材料・構造力学 / 維持・管理 / 鋼構造 |
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| Research Abstract |
Main objectives of this research is the establishment of fatigue strength evaluation based on advanced fracture mechanics approach for the large welded built up structures, which enables to evaluate not only the fatigue performance but also the integrity of the structures from the crack length estimation and the loading conditions. Especially, “Fatigue crack growth estimation subjected biaxial loading with different phase of each loading direction” and “Fatigue crack evolution of a surface crack” were highlighted as the research topics in this study. In addition, improvement of fatigue crack growth considering the fatigue crack closure was conducted to support the main research topics.
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