Evaluation of crack propagation characteristics in consideration of the mechanical environment and the crystal structure of the fatigue crack tip
| Project/Area Number |
23360391
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | Nagasaki University |
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Principal Investigator |
KATSUTA Junichi 長崎大学, 工学(系)研究科(研究院), 准教授 (20161078)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2013: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2012: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2011: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
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| Keywords | 亀裂伝播 / 疲労亀裂 / 結晶組織 / 力学的環境 / 画像処理 / 疲労き裂 / 伝播経路 / 鋼材 / パーライト / ３次元形状 / 疲労き裂伝播 / 結晶組織の影響 / 疲労き裂の屈曲 / PIV法 / ヒステリシスループ |
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| Research Abstract |
This research has examined the evaluation method that considered the influence of the crystalline structures to the fatigue crack propagation evaluated only in mechanical environment. A purpose of the studies is to get the basics that a highly precise estimate method of fatigue life of the steel structures and the steel which the fatigue crack propagation improved develops.
The obtained results are clarification of the deformation at the fatigue crack tip using a high speed and large magnification video during the fatigue crack propagation test by the PIV method, calculation of the re-compressive plastic zone at the fatigue crack tip using the obtained deformation of the crack tip, and elucidation of the three-dimensional relation of the crystalline structures and the fatigue crack route.
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Report
(4 results)
Research Products
(22 results)
