CF/PA6積層板における熱融着を利用した衝撃損傷修復と圧縮強度の回復

Abstract

The effect of repair using thermal fusion bonding (TFB) on residual compressive strength was investigated in carbon fiber reinforced polyamide 6 (CF/PA6) cross-ply laminate with several impact damage. Cross-ply laminates with different ply-thickness (0.04 mm and 0.12 mm) were prepared in order to investigate the influence of the different impact damage due to ply thickness. Here, cross-ply laminates used for specimens was made of CF/PA6 unidirectional semiprepreg, which had 54% in fiber volume fraction. The experimental results indicated that TFB was shown as one of the effective methods to repair the impact damage caused by matrix failure and to recover the compressive strength. In addition, fiber and matrix did not flow out from the specimen during TFB. On the other hand, TFB was not effective to decrease in compressive strength caused by fiber breakage due to buckling before reaching compressive strength of intact specimen.