| Project/Area Number |
07555528
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
Material processing/treatments
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| Research Institution | Osaka City University |
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Principal Investigator |
FUKUDA Takehito Osaka City University, Depertment of Mechanical Engineering, Professor, 工学部, 教授 (40047155)
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| Co-Investigator(Kenkyū-buntansha) |
KITADE Shintaro Ishikawajima-Harima Heavy Industries, Technical Research Laboratory, Research En, 技術研究所, 研究員
OSAKA Katsuhiko Osaka City University, Depertment of Mechanical Engineering, Assistant Professor, 工学部, 講師 (10167299)
MOTOGI Shinya Osaka City University, Depertment of Mechanical Engineering, Associate Professor, 工学部, 助教授 (40221626)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1996: ¥3,200,000 (Direct Cost: ¥3,200,000)
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| Keywords | Autoclave molding / Advanced composite material / Expert system / Curing of matrix resin / Internal strain / Monitoring |
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| Research Abstract |
The objective of this research project is to construct an expert system for the autoclave molding process of advanced composite materials by using optical fiber sensors. The following results were obtained ; 1. Using the expert system developed in this project, a system for in-situ monitoring of the internal strain by optical fiber sensors was constructed. This system is available and effective for controlling the molding conditions. The system is effectively applied to real-time monitoring of the internal strain of uni-directional composite laminates.
2. Basic measuring techniques for construction of date base indispensable for molding by expert system could be established. The specific results are as follows ;
(1) Relation between degree of cure of the resin obtained by dielectric constant monitoring and the internal strain measured by optycal sensors was specified.
(2) It was shown that ultrasonic wave velocities propagating in cured laminates could be a good indicator of the degree of cure of composites. This shows that the optimum cure conditions can be estimated not only by in-situ monitoring with optical fibers but also by ultrasonic way applied to already cured materials.
(3) The fracture toughness was estimated in conjunction with the molding pressure, by which the relation between the fracture toughness and the curing pressure was established.
(4) The effects of implantation of optical fibers into composite materials on the compressive strength were investigated. This gave basic data for optimum method of embedding the optical fibers by which the internal strain is measured.
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