OS0316 電気抵抗変化法を用いたCFRP損傷検知に及ぼす温度変化の影響(OS3-4 電磁気,OS-3 非破壊評価と構造モニタリング2)

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  • OS0316 A temperature change effect on damage detection of CFRP using electrical resistance change method

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Carbon Fiber Reinforced Plastic (CFRP) laminates are weak in durability against impact load, and it yields internal damage like delamination. The electrical resistance change method (ERCM) which is one of the nondestructive inspection is useful for CFRP structures, because electrical conductivity of carbon fiber can be used as a sensor for damage detection. Many researchers detect various kinds of damage of CFRP laminates by the ERCM. However, there are some effects such as a temperature change and a cyclically loading in real environment. This study experimentally deals with the effect on the ERCM. At first it was revealed that the relationship between temperature and electrical resistance change was almost linear. Moreover, it was investigated that the temperature coefficient depends on a fiber orientation angle. Finally, temperature change was observed in fatigue tests, therefore electrical resistance is formulated as constant temperature.

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