Development of a Systems for Fatigue Life Assessment of Weld Structures
| Project/Area Number |
26289332
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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 |
Naval and maritime engineering
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2016: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2015: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
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| Keywords | 疲労亀裂 / 弾塑性 / 溶接構造 / 繰返し軟化 / 繰返し硬化 / 疲労 / き裂発生 / き裂伝播 / シミュレーション / 塑性 / き裂 / 寿命 / 継手 / 溶接 / 残留応力 |
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| Outline of Final Research Achievements |
The Finite Element analyses carried out in this paper aimed to examine the effect of the weld bead shape on the fatigue crack initiation and propagation lives of a non-load carrying fillet joint under cyclic loading condition. At the same time, the effect of the factors, such as cyclic loading amplitude/welding residual stress/pre-loading/bead shape, on the fatigue life were examined. Fatigue life is obtained as the total of crack initiation and propagation lives. The results numerically obtained were in good agreement with the experimental ones by the Japanese Society of Steel Construction (JSSC) and the result provides that comparing the factors of fatigue, the bead shape has a strong effect on the crack initiation life.
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Report
(4 results)
Research Products
(29 results)
