らせん形状の損傷による複合材料積層板の圧縮特性劣化

概要

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Compressive property degradation of the composite laminated plates due to a characteristic damage state (CDS) in quasi isotropic laminates ([45°/90°/-45°/0°]n ) subjected to a transverse impact is studied numerically, which consist of a spiral array of inter-connected transverse cracks and delaminations, separating a laminates into sublaminates. The results are compared with those of laminated plates having circular delaminations of an equivalent number and size. The compressive property degradation due to the spiral array damage is found to be insignificant compared to the circular delaminations. It is because the portion around the center axis connected each other through the thickness constrains relative movements of the separated ligaments. It can be said that some other factors of the impact damage neglected in the present model must contribute to the property degradation.
社団法人日本航空宇宙学会の論文
2003-08-05