10201 電気抵抗変化による樹脂埋めした炭素繊維の変形測定(OS3-1【高分子系複合材料の成形と力学特性(1)】)

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  • 10201 Measurement of a carbon nber deformation in an epoxy matrix by electrical resistance change

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Deformation of a carbon fiber in an epoxy matrix was investigated by measuring electrical resistance change of a arbon fiber. First, electrical resistance change of a carbon fiber due to temperature change was measured to eliminate the effect of exothermal reaction of epoxy matrix. Then,electrical resistance change of carbon fiber in an epoxy matrix was measured during the matrix curing. Electrical resistance of the carbon fiber decreased in the early phase of the matrix curing,then increased due to the shrinkage of the epoxy matrix. The effect of low electrical resistance of the epoxy hardener was larger than the effect of temperature change. After the curing of the epoxy matrix, electrical resistance change of the carbon fiber was about 0.2%,from which deformation of the carbon fiber was discussed. The carbon fiber contracted both in longitudinal and radial direction due to shrinkage of the epoxy matrix.

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