ＣＦ／ＰＥＥＫ材とＣＦ／エポキシ材を用いた補強平板構造の衝撃後残留圧縮強度

DOI Web Site Web Site 被引用文献3件

書誌事項

タイトル別名
  • Compression after Impact Strengths of Stiffened Panels Made of CF/PEEK and CF/Epoxy.
  • CF PEEKザイ ト CF エポキシザイ オ モチイタ ホキョウ ヘイバン

この論文をさがす

抄録

Compression after impact (CAI) tests are conducted for stiffened panels made of carbon fiber (CF)/epoxy and CF/PEEK composite systems. Delaminations between skin and stiffeners are created by impact with various energy levels. Relationships between normalized impact energy levels with respect to thickness and delamination area are obtained through a robotic ultrasonic C-scan system. Compression tests are conducted with the aid of moiré-topography camera and multi-channel acoustic emission analyzer. CAI strength of a CF/PEEK panel is superior to those of CF/Epoxy panels. In the CF/PEEK panels, delamination propagation is well arrested just by the instance of catastrophic failure, and hence, high CAI strengths are obtained. In the CF/epoxy panels with a current skin of low axial stiffness, delamination propagation between skin and stiffeners is well arrested after initial separation onset. Hence, their CAI strengths are higher than those of thick plates where delaminations easily propagates transversely to loads. Initial buckling stresses are numerically obtained through a FEM code. Some factors are crucial for accurate predictions. Stress dependency of longitudinal elastic modulus of unidirectional CFRP is the most important point. For relatively short panels used here, delicate consideration of loading edge boundary conditions is required. Consideration of realistic initial imperfection slightly improves correlation between prediction and experiments.

収録刊行物

被引用文献 (3)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ