Development of Expert System for Autoclave Molding of Advanced Composite Materials Using Optical Fiber Sensor

利用光纤传感器开发先进复合材料热压罐成型专家系统

• 批准号: 07555528
• 负责人: FUKUDA Takehito
• 金额: $ 2.05万
• 依托单位: Osaka City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555528/
• 关键词: Autoclave molding; Advanced composite material; Expert system; Curing of matrix resin; Internal strain; Monitoring

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.

本研究旨在建构一个以光纤感测器为核心之先进复合材料热压罐成型制程专家系统。获得了以下结果：1。利用本计画所开发之专家系统，建构一光纤感测器量测混凝土内部应变之系统。该系统可有效地控制成型条件。该系统有效地应用于单向复合材料层合板内部应变的实时监测.建立了用专家系统建立造型所必需的数据库的基本测量技术。具体结果如下：（1）确定了由介电常数监测得到的树脂固化度与由光学传感器测得的内部应变之间的关系。(2)结果表明，超声波在固化层合板中的传播速度可以很好地反映复合材料的固化程度。这表明，最佳固化条件不仅可以通过光纤原位监测来估计，还可以通过应用于已固化材料的超声波方式来估计。(3)结合成型压力估算了断裂韧性，建立了断裂韧性与固化压力之间的关系。(4)研究了在复合材料中植入光纤对复合材料抗压强度的影响。这为测量光纤内部应变的最佳埋设方法提供了基础数据。

项目成果

Shinya MOTOGI: "Relationship between Ultrasonic Wave Velocities and Degree of Cure in Fiber Composite Laminates Determined by Dielectric Constant Monitoring" Proc.of 3rd International Symposium of Textile Composites in Building Construction. 1. 357-364 (1

Shinya MOTOGI：“通过介电常数监测确定纤维复合材料层压材料中超声波速度与固化程度之间的关系”，第三届建筑施工中纺织复合材料国际研讨会论文集。

Shintaro KITADE: "Microscopic Observations of Optical Fibers Embedded in Curing Process into Composite Laminates" Proc. of the 4th Japan International SAMPE Symposium and Exhibition. 1. 112-117 (1995)

Shintaro KITADE：“复合材料层压板固化过程中嵌入光纤的显微观察”Proc。

北出真太郎: "光ファイバを用いたFRP積層板の衝撃損傷試験" 材料. 44. 1196-1200 (1995)

Shintaro Kitade：“使用光纤的 FRP 层压板的冲击损伤测试”材料 44. 1196-1200 (1995)。

Takehito FUKUDA: "Vibration Measurement of Fiber Composite Beam Using Interferometric Michelson Fiber Optic Sensor with Digital Processing" Proc. of the 10th International Conference on Composite Materials. 5. 339-346 (1995)

Takehito FUKUDA：“使用具有数字处理功能的干涉式迈克尔逊光纤传感器进行纤维复合梁的振动测量”Proc。

Jianye JLANG: "Use of Optical Fiber Sensors in Autoclave Molding of GFRP Laminates" Proc.of 11th International Conference on Composite Materials. (1997)

建业吉朗：“光纤传感器在 GFRP 层压板热压罐成型中的应用”第 11 届国际复合材料会议论文集。