多電極を用いた電気抵抗変化によるCFRPマトリックス割れ検知(J09-1 モニタリング,J09 知的材料・構造システム)

概要

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For a cryogenic tank of a next generation RLV, a laminated composite tank is one of the key technologies. For the fuel tank made from laminated composites, matrix cracking is a significant problem that causes leak of fuel. In our previous study, an electric resistance change method was adopted to detect the matrix cracking of the laminated composites. For an actual application, this method should be adopted using multiple electrodes for the entire structure. In present study, experimental investigations were performed using cross-ply laminates with multiple electrodes that have equal spacing gauge length. As a result, it can be revealed that the local matrix cracking can be detected by means of residual electric resistance. The change of the electrical contact between an electrode and carbon fibers, however, causes the experimental error in measuring of residual electric resistance.
社団法人日本機械学会の論文
2004-09-04