Forseeing of Fracture in CFGFRP

CFGFRP断裂预测

• 批准号: 04555183
• 负责人: YANAGIDA Hiroaki
• 金额: $ 4.48万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555183/
• 关键词: CFGFRP; Forseeing of fracture; Self-diagnosing; 歪検出; 複合材料

The author has been considering a design the material which must have two stages during fracture process. The material has been given intelligence from a view point of a mechanical property. The double-waist material is made from combination of the material A (high modulus, small elongation) and the material B (high ductility, large elongation). CFGFRP is a material from this view point, which purpose is a substitution of steel reinforcements for concrete developed by Simizu Corporation. It is a self-dianostic material, a seed which can move easily in the material A but not in the material B.When a capability of the seed motion is investigated, it moves easily while the material A stays sound, and there is a range where the material B is still sound after fracture of the material A.The width of this range can be designed by appropriately selecting moduli and elongations of the material A and B.Electricity and light are easily detected as movable seeds. Especially concerning for electricity, measurement of resistance is useful for ordinary equipments. Namely, in combination of the material A as a conductor and B as an insulator, after lost of conductivity it reaches a caution range, but it has a capacity to reach to a fatal fracture because B is still sound. This is the design of self-diagnosis. The authors selected carbon fiber as A and glass fiber as B, and this selection agreed with CFGFRP developed by Shimizu Corporation.

作者一直在考虑设计一种在断裂过程中必须有两个阶段的材料。从机械性能的角度来看，该材料被赋予了智能。双腰料是由A料（高模量、小伸长率）和B料（高延展性、大伸长率）组合而成。 CFGFRP就是从这个角度来看的一种材料，其目的是由Simizu公司开发的钢筋替代混凝土。它是一种自诊断材料，是一种在材料A中可以轻松移动但在材料B中则不能移动的种子。当研究种子运动的能力时，在材料A保持完好的情况下它很容易移动，并且存在一个范围其中材料B在材料A断裂后仍然完好。这个范围的宽度可以通过适当选择材料A和B的模量和伸长率来设计。电和光很容易被检测为可移动的种子。特别是对于电力而言，电阻测量对于普通设备非常有用。也就是说，在材料A作为导体和B作为绝缘体的组合中，在失去导电性后，它达到了警告范围，但由于B仍然完好，所以它有可能达到致命的断裂。这就是自诊断的设计。作者选择碳纤维作为A，玻璃纤维作为B，这一选择与清水公司开发的CFGFRP一致。

项目成果

N.Muto et al.: "Preventing Fatal Fracture in Carbon Fiber-Glass Fiber Reinforced Plastic Composites by Monitoring Change in Electrical Resistance" J.Am.Ceram.Soc.76. 875-879 (1993)

N.Muto 等人：“通过监测电阻变化来防止碳纤维-玻璃纤维增​​强塑料复合材料中的致命断裂”J.Am.Ceram.Soc.76。

N.Muto: "Design of Intelligent Materials with Self-diagnosing Function for Preventing Fatal Fracture" Smart Mater.Struct.1. 324-329 (1992)

N.Muto：“具有自我诊断功能的智能材料的设计，可防止致命性骨折”Smart Mater.Struct.1。

N.Muto: "Self-Diagnosis of Fracture in CFGFRP Composite and CFGFRP Reinforced Concrete" 日本セラミックス協会学術論文誌. 100. 1429-1434 (1992)

N.Muto：“CFGFRP 复合材料和 CFGFRP 钢筋混凝土断裂的自我诊断”日本陶瓷学会杂志 100。1429-1434 (1992)。

武藤範雄: "CFGFRP補強コンクリートの破壊に対する自己診断性能" 日本セラミックス協会学術論文誌. 101. 860-866 (1993)

Norio Muto：“CFGFRP 增强混凝土抗断裂的自诊断性能”日本陶瓷学会杂志 101. 860-866 (1993)。

N.Muto et al.: "Self-Diagnosis of Fracture in CFGFRP Composite and CFGFRP Reinforced Concrete" J.Ceram.Soc.Jpn.100. 1429-1434 (1992)

N.Muto 等人：“CFGFRP 复合材料和 CFGFRP 钢筋混凝土断裂的自我诊断”J.Ceram.Soc.Jpn.100。