| Project/Area Number |
15360045
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | TOHOKU UNIVERSITY |
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Principal Investigator |
FUKUNAGA Hisao TOHOKU UNIVERSITY, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (50134664)
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| Co-Investigator(Kenkyū-buntansha) |
HU Ning TOHOKU UNIVERSITY, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (60250685)
OKABE Tomonaga TOHOKU UNIVERSITY, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (50344164)
KAMEYAMA Masaki TOHOKU UNIVERSITY, Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (30302178)
SUZUKI Hiroshi HACHINOHE INSTITUTE OF TECHNOLOGY, FACULTY OF ENGINEERING, PROFESSOR, 工学部, 教授 (90179242)
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥9,300,000 (Direct Cost: ¥9,300,000)
Fiscal Year 2004: ¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 2003: ¥5,300,000 (Direct Cost: ¥5,300,000)
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| Keywords | COMPOSITE MATERIAL / DAMAGE IDENTIFICATION / PIEZOELECTRIC MATERIAL / LAMB WAVE / DAMAGE GROWTH ANALYSIS / REAL-TIME MONITORING / HEALTH MONITORING / CFRP / 複合材料 |
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| Research Abstract |
In the present research, we have developed a real-time and automatic health monitoring method for smart composite structures with piezoelectric sensors, in order to improve the reliability and safety of composite structures. The conclusions obtained by the present study are summarized as follows :
1.We proposed a force identification method to estimate the location and history of impact force using dynamic responses of piezoelectric sensors embedded in composite laminates. The validity of the present method is verified through an impact experiment of CFRP laminated plates using impulse hummer, and it is shown that the location and history of impact force can be identified precisely in a few seconds after impact. A real-time damage monitoring method under impact force is also developed by using damage growth analysis.
2.We proposed a damage monitoring method of laminated composites based on an active sensing using piezoelectric actuators and sensors. The density of matrix cracking of cross-ply laminates under extension is identified effectively from the velocity variation of Lamb waves in laminated composites with and without damage.
3.Highly effective spectral analysis is developed to analyze the wave motion in laminated composites with matrix cracking or delamination.
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