| Project/Area Number |
25820276
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Building structures/Materials
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| Research Institution | Ariake National College of Technology |
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Principal Investigator |
Iwashita Tsutomu 有明工業高等専門学校, その他部局等, 准教授 (10332090)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2013: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | 脆性破壊 / 累積塑性変形能力 / ワイブル応力 / 損傷度 / 繰返し載荷 / 切欠き / 塑性変形能力 / 繰返し負荷 / 有限要素解析 |
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| Outline of Final Research Achievements |
The research purpose was to establish an estimation method of accumulated plastic deformation capacity determined by brittle fracture from notched specimens under cyclic loading.
The test results showed that a relationship between amplitude and plastic deformation capacity could assess occurrence of brittle fracture in a unified manner for different fracture toughness materials. Also, the results showed a high correlation between cumulative damages from fracture cycle number and accumulated plastic deformation capacity. Finally, an estimation method with the Weibull stress, which is the brittle fracture criterion, showed the possibility of predicting accumulated plastic deformation capacity for various loading patterns with a different amplitude.
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