2017 Fiscal Year Final Research Report
Fiber-optic AE sensing system to clarify the damage progress in CMC at ultra-high temperature
Project/Area Number |
15K06457
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Composite materials/Surface and interface engineering
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Research Institution | The University of Tokyo |
Principal Investigator |
Okabe Yoji 東京大学, 生産技術研究所, 准教授 (90313006)
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Research Collaborator |
YU Fengming 東京大学, 生産技術研究所, 特任研究員
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Project Period (FY) |
2015-04-01 – 2018-03-31
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Keywords | AE計測 / 光ファイバセンサ / 高温環境 |
Outline of Final Research Achievements |
Ceramics matrix composites (CMC) are expected to be used as heat-resistant lightweight structural materials. For the practical use of CMC, the complex damage progress in the material at high temperature should be clarified. In this research, the authors developed a novel remote acoustic emission (AE) measurement system using a phase-shifted fiber Bragg grating (PSFBG) fiber-optic sensor and succeeded in the precise AE measurement at high temperature of about 1000 degree Celsius. Then, AE waves measured in CFRP laminates could be categorized into three types of inherent microscopic damages of the CFRP. Moreover, regenerated FBG (RFBG) was produced from the PSFBG by annealing treatment as a heat-resistant fiber-optic sensor, and the RFBG could directly detect ultrasonic waves under high-temperature environment.
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Free Research Field |
構造健全性診断
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