マトリックスクラックを有する吸湿したCFRPクロスプライ積層板の電気抵抗特性

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  • Electrical Resistance Characteristics in Wet CFRP Cross-Ply Laminates with Matrix Cracking
  • マトリックスクラック オ ユウスル キュウシメシタ CFRP クロスフライ セキソウバン ノ デンキ テイコウ トクセイ

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This paper presents electrical resistance change due to moisture in a CFRP cross-ply laminate with and without matrix cracking. First, the electrical resistance change was measured for wet unidirectional and cross-ply laminates at room temperature and below the freezing point. Next, an equivalent circuit model was proposed for the cross-ply laminate, taking the resistance change ascribed to matrix cracking into account. It was found that resistance characteristics of the intact cross-ply laminate were similar to those of the longitudinal ply. Resistance properties of the wet cross-ply laminate with matrix cracking were dominated by those of the longitudinal ply, while the resistance change of the dry cracked cross-ply laminate was affected by the matrix crack resistance. The resistance of the dry cracked laminate decreases below the freezing point. Contrarily, the resistance of the wet cracked laminate increases below the freezing point.

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