Damage Detection of CFRP Bolted Joints Using Embedded Optical Fibers with BOCDA System
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- MINAKUCHI Shu
- 東京大学大学院新領域創成科学研究科
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- NAKAMURA Tatsuya
- 東京大学大学院新領域創成科学研究科
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- NADABE Takeaki
- 東京大学大学院新領域創成科学研究科
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- NISHIKAWA Masaaki
- 京都大学大学院工学研究科
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- TAKEDA Nobuo
- 東京大学大学院新領域創成科学研究科
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- KISHI Masato
- 東京大学大学院工学系研究科
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- HOTATE Kazuo
- 東京大学大学院工学系研究科
Bibliographic Information
- Other Title
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- 埋め込み光ファイバの分布型BOCDA計測によるCFRPボルト接合部の損傷検知
- ウメ コミ ヒカリ ファイバ ノ ブンプガタ BOCDA ケイソク ニ ヨル CFRP ボルト セツゴウブ ノ ソンショウ ケンチ
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Abstract
The authors proposed fiber-optic-based damage monitoring of carbon fiber reinforced plastic (CFRP) bolted joints. Optical fibers were embedded along bolt holes and strain change along the optical fiber induced by internal damage was measured by a Brillouin Optical Correlation Domain Analysis (BOCDA), which is a high spatial resolution distributed strain sensing system. This study began by investigating damage modes of CFRP bolted joints after bearing failure. Effective embedding positions of optical fibers were then proposed and their feasibility was evaluated by finite element analysis simulating the damage propagation in the bolted joint and consequent strain change. Finally, verification tests were conducted using specimens with embedded optical fibers at various positions. It was clearly shown that damage could be detected using residual strain due to fiber-microbuckling (kinking) damage or permanent deformation of neighboring plies. Furthermore, damage size and direction could be estimated from the change in the strain distribution. The system developed is quite useful for a first inspection of large-scale composite structures in aerospace applications.
Journal
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- JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES
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JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 59 (690), 176-182, 2011
THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES
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Keywords
Details 詳細情報について
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- CRID
- 1390282679447614208
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- NII Article ID
- 10030274766
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- NII Book ID
- AA11307372
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- ISSN
- 24323691
- 13446460
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- NDL BIB ID
- 11184957
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed