Improving Fatigue Strength of Welded Joints by Laser Peening
| Project/Area Number |
21360214
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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 |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2010: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2009: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
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| Keywords | レーザピーニング / 溶接 / 疲労 / 残留応力 / 大型試験体 |
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| Research Abstract |
Nozzle-type laser peening unit, which can apply to welding joints of large steel structures, was developed in this study. Then, it was elucidated by residual stress measurement that large and deep compressive residual stress was also generated by nozzle-type laser peening. Moreover, improving fatigue strength of welded joints after laser peening was ascertained by conducting fatigue tests using large specimens.
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Report
(5 results)
Research Products
(9 results)
