| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| 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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