S0406-2-4 一方向CFRPの高温における非主軸圧縮切欠強度とその切欠寸法依存性(プラスチック基複合材料の加工と評価(2))

概要

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The notch size effect in the off-axis compressive strength of a unidirectional CFRP at high temperature (100℃) has been studied. This study also aims to develop engineering methods for predicting the off-axis notched strengths. Static compression tests were carried out on center hole (CH) specimens with different hole diameters and different fiber orientations. Experimental results showed that the off-axis compressive strengths of the CH specimens become smaller with increasing hole diameter, except for the 0° and 10° specimens. It was also found that the compressive notch sensitivity depends on the ultimate failure mode of the specimens, and it is likely to be lower as the out-of-plane shear failure becomes more appreciable. The off-axis compressive notched strengths were predicted using the off-axis notch sensitivity model and the Feddersen model. These engineering models can efficiently predict the off-axis notch sensitivity, but they fail to predict the off-axis notched strengths distributed in the vicinity of the notch insensitive line.
2009-09-12