一方向CFRP積層板の動的破壊靱性値の評価(<小特集>材料・構造の衝撃問題)

概要

論文の詳細を見る
In the present paper, dynamic inter-laminar fracture toughness are estimated for carbon fiber reinforced plastics (CFRP). In the experiments, split Hopkinson's bar test was applied to dynamic end notched flexure (ENF) test. The dynamic deformation of the specimen is approximated by beam theory with Laplace transform. The mode II fracture toughness of unidirectional CFRP was estimated by the analyzed deflection of the specimen employing the scheme of J-integral with the measured impulsive load and reactions at the supported points. Through some numerical calculations, validity of the J-integral for the dynamic ENF test is confirmed. In addition, as a experimental result, dynamic inter-laminar fracture toughness of CF/EPOXY unidirectional specimens are estimated and it indicates dependency on deflection rate.
社団法人日本機械学会の論文
1997-12-25