面外荷重を受けるCFRP積層板の層間はく離形状の推定 : 層間はく離の発生要因の解析

概要

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Delamination in CFRP plates frequently occurs due to the transverse loading. The purpose of this study is to establish an estimation scheme of delamination in a CFRP plate by evaluating the delamination toughness between laminates. Both experimental and numerical studies are conducted. Delamination occurs at the interlaminar region where the fiber orientation changes. The delamination toughness is evaluated by a three-dimensional finite-element method. Analyses are conducted assuming a single delamination in a plate. Distribution of the J-integral along the crack front is larger on the parallel part of the delamination. The average of the J-integral on the parallel part of the delamination is obtained and defined as delamination toughness. The delamination toughness changes with change of fiber orientation. Finally, the shape of delamination is estimated numerically.
一般社団法人日本機械学会の論文
1996-04-25