History Memorable Monitoring System for Composites using Electrical Impedance Changes

历史难忘的利用电阻抗变化的复合材料监测系统

• 批准号: 15560062
• 负责人: TODOROKI Akira
• 金额: $ 2.37万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560062/
• 关键词: Composites; Carbon Fiber; Delamination; Monitoring; Electrical Resistance; Electrical Potential; 電気抵抗変化; ひずみ; マトリックス割れ; 無線; 電気インピーダンス; 硬化; CFRP

Carbon Fiber Reinforced Polymer (CFRP) laminates are applied to many aerospace structures. Several processing methods of the CFRP laminates have been adopted to fabricate the CFRP structures. Cure monitoring of composite structures is crucial for quality control and improvement of mechanical properties of structures. After curing, strain monitoring of the CFRP structures is very important to confirm integrities of processing, as well as vibration monitoring and applied stress monitoring to know the condition of the external loading. Since the delamination is invisible or difficult to detect by visually, the delamination causes low reliability for primary structures. To improve the low reliability, smart systems of delamination identifications in-service are desired. A structural health monitoring system to monitor the delaminations is one of the desired approaches. Matrix cracking simply causes fuel leak when a lot of matrix cracking occurs in a CFRP fuel tank. These damages of matrix … More cracking and delaminations are significant for aerospace applications. Recently, an electrical impedance change method is employed to detect the internal damages of CFRP laminates. The electrical resistance change method does not require expensive instruments. Since the method adopts a reinforcement carbon fiber itself as a sensor, this method does not cause reduction of strength, and it is applicable to existing CFRP structures.In the present research, therefore, the electrical impedance change method is adopted for sensors of cure monitoring, strain monitoring, matrix crack monitoring and delamination monitoring. These successful results enable us to monitor a lot of information of the CFRP laminates by means of the electrical resistance and capacitance changes in many applications. Not only the individual successful results, a new united concept of the electrical resistance change method is proposed here. Object-oriented programming system is adopted for analyses of composites. Class "composites" is designed here to represent composite materials and history of the target composite component. All of the curing applied strain and damage information monitored using the electrical impedance change method is input in the memory of the "composite" class. By means of the electrical impedance change method, we can obtain the personal resume of the composite components. Less

碳纤维增强聚合物（CFRP）层压板应用于许多航空航天结构。碳纤维复合材料层合板的几种加工方法被用于制造碳纤维复合材料结构。复合材料结构的固化监测是控制结构质量和提高结构力学性能的关键。固化后CFRP结构的应变监测对于确认加工的完整性、振动监测和外加应力监测对于了解结构的外载荷情况具有重要意义。由于分层是不可见的或难以用视觉检测到的，分层导致初级结构的可靠性低。为了改善低可靠性，需要在役的智能分层识别系统。结构健康监测系统是监测分层的理想方法之一。当CFRP燃料箱发生大量基体开裂时，基体开裂只会导致燃油泄漏。这些损伤对航空航天应用具有重要意义。近年来，采用电阻抗变化法检测CFRP复合材料的内部损伤。电阻变化法不需要昂贵的仪器。由于该方法采用增强碳纤维本身作为传感器，因此该方法不会造成强度的降低，适用于现有的CFRP结构。因此，在本研究中，固化监测、应变监测、基体裂纹监测和分层监测传感器采用电阻抗变化法。这些成功的结果使我们能够在许多应用中通过电阻和电容的变化来监测CFRP层压板的大量信息。除了个别成功的结果外，本文还提出了一种新的电阻变化法的统一概念。采用面向对象的程序设计系统对复合材料进行分析。类“composites”在这里被设计为表示复合材料和目标复合部件的历史。使用电阻抗变化法监测的所有固化应变和损伤信息都输入到“复合”类的存储器中。通过电阻抗变化法，我们可以得到复合元件的个人简历。少

项目成果

稲田貴臣, 轟章: "電気容量変化の交流周波数依存を用いたCFRPの成形モニタリング"材料. 52・8. 922-926 (2003)

Takaomi Inada、Akira Todoroki：“利用电容变化的交流频率依赖性来监测 CFRP 的形成”材料 52・8 (2003)。

Electrical resistance change method for monitoring delaminations of CFRP laminates: effect of spacing between electrodes

• DOI: 10.1016/j.compscitech.2004.05.018
• 发表时间: 2005
• 期刊: Composites Science and Technology
• 影响因子: 9.1
• 作者: A. Todoroki;Miho Tanaka;Y. Shimamura

Electric Resistance Change Method for cure/Strain/Damage Monitoring of CFRP Laminates

用于 CFRP 层压板固化/应变/损伤监测的电阻变化方法

• 发表时间: 2004
• 期刊: Key Engineering Materials 270-273
• 作者: K.Kasaba;K.Katagiri;A.Murakami;G.Sato et al.;Akira Todoroki
• 通讯作者: Akira Todoroki

Electrical resistance change of unidirectional CFRP due to applied load

• DOI: 10.1299/jsmea.47.357
• 发表时间: 2004-07-01
• 期刊: JSME INTERNATIONAL JOURNAL SERIES A-SOLID MECHANICS AND MATERIAL ENGINEERING
• 作者: Todoroki, A;Yoshida, J
• 通讯作者: Yoshida, J

電気抵抗変化法と発振周波数変化を用いたCFRP積層板の無線はく離検出

利用电阻变化法和振荡频率变化对CFRP层压板进行无线剥离检测

• 发表时间: 2005
• 期刊: 日本機械学会論文集,A編 71・703
• 作者: 松崎亮介;轟章
• 通讯作者: 轟章