| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Laser peening can introduce compressive residual stress to the surface and, therefore, is effective in enhancing the fatigue strength. This study targets confirmation of enhancing fatigue lives due to laser-peening with low pulse energy in order to develop portable laser-peening system. As a result, laser-peening condition with low pulse energy was selected, and effects of the laser-peening were confirmed by residual stress measurements and fatigue experiment with large scale specimen. Moreover, the results were compared with that of other types of peening. Numerical analysis models of laser-peening were also studied.
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