| Project/Area Number |
20560089
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Waseda University |
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Principal Investigator |
KAWADA Hiroyuki Waseda University, 理工学術院, 教授 (20177702)
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| Co-Investigator(Kenkyū-buntansha) |
KOYANAGI Jun 宇宙航空研究開発機構(JAXA), 助教 (60386604)
小谷 正浩 早稲田大学, 理工学術院, 助手 (80547042)
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| Co-Investigator(Renkei-kenkyūsha) |
KOTANI Masahiro 早稲田大学, 理工学術院, 助手 (80547042)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2008: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | 破壊 / 複合材料 / 応力腐食割れ / 界面劣化 / FRP / 環境強度 / 長期信頼性 / 繊維強度低下 |
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| Research Abstract |
The aim of this research is to investigate the long term durability of GFRP in hydrothermal environment and to propose its lifetime prediction model. The GFRP under study is consisted with plain E-glass cloth and vinylester resin. The constant tensile load tests were conducted in hydrothermal environment (i.e. deionized water) and in air. The fracture occurred only in hydrothermal environment and the fracture time decreased with the increase in the applied stress and the temperature. The fracture time was predicted based on Reiner-Weissenberg criterion and the predicted results showed good agreement with the experimental data by considering the degradation induced by the hydrothermal aging and its acceleration by the increasing temperature.
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