Forseeing of Fracture in CFGFRP

笔者一直在考虑一种材料在断裂过程中必须经历两个阶段的设计。从力学性质的观点来看，这种材料被赋予了智能。双腰材料由材料A（高模量、小伸长率）和材料B（高延展性、大伸长率）组合而成。CFGFRP就是从这个角度出发的一种材料，它的目的是代替混凝土的钢筋，由思米祖公司开发。self-dianostic材料,材料的种子,可以很容易的但不是材料B.When种子运动能力调查,移动时轻松而材料保持声音,还有一系列的材料B仍然是骨折后声材料这范围的宽度可以通过适当选择模材料的伸长率和B.Electricity光很容易检测到可移动的种子。电阻的测量对普通设备来说是很有用的，特别是对电。也就是说，材料A作为导体，材料B作为绝缘体，在失去导电性后，它达到了一个谨慎的范围，但它有能力达到致命的断裂，因为B仍然是健全的。这是自我诊断的设计。选用碳纤维为A，玻璃纤维为B，这与清水公司开发的CFGFRP是一致的。

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.