OS0503 クロスプライCFRP積層板の非主軸切欠強度とそのサブラミネート厚依存性(微視構造を有する材料の変形と破壊,オーガナイズドセッション)

概要

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Effects of fiber orientation and sub-laminates thickness on the off-axis notched strength of symmetric cross-ply CFRP laminates have been studied. First, static tension tests were performed on center hole (CH) specimens of two types of cross-ply laminates, A:[0/90]_<3s>, B:[O_2/90_4]_s, for three different fiber orientations θ = 0, 15, 45° in order to evaluate the off-axis notched strengths, hole size effects, and the effect of the sub-laminate thickness on off-axis notched strength. The type A laminate exhibited significant difference between the notch sensitivity in the fiber and. off-axis directions, while no significant difference in notch sensitivity was observed in the type B laminate, regardless of fiber orientation. The latter observation reveals that the type B laminate with thicker sub-laminate is almost insensitive to a notch. Then, a new off-axis notch sensitivity model recently developed as well as some classical notch strength models were tested for accuracy of prediction of the off-axis notched strengths of these two types of cross-ply laminates.
2009-07-24