切欠きをもつFRP板の静荷重による損傷 : 輝度測定法による損傷評価

抄録

The validity of the concept of linear notch mechanics for evaluating the damage near the notch root of notched FRP plates is investigated experimentally. An experimental method is presented for examining the effect of notch geometry on the damage near the notch root of FRP plates in tension and bending. Two kinds of FRP plate were used : a woven roving glass fabric/epoxy laminate and a short-glass-fiber reinforced polycarbonate. To evaluate the damage near the notch root, we measured the luminance distributions by means of the luminance measuring technique using a CCD camera. The results show that the growth of the damaged zone near the notch root was governed predominantly by both the notch-root radius and the maximum elastic stress at the notch root, while it was independent of notch depth and type of loading. Using linear notch mechanics, the experimental results can be clearly explained.