炭素短繊維複合材料の小球衝突損傷に及ぼす小球材質の影響

抄録

In this study, a small sphere impact test was carried out using a short fiber reinforced composite material to investigate the effect of sphere material on sphere impact damage. After impact test, the bending test was carried out and the residual strength was investigated. As the results, in the case of 4mm WC sphere, 6mm WC sphere, 4mm SUJ2 sphere and 4mm Al sphere, the number of radial cracks, the indentation diameter, indentation depth and residual strength ratio can be well organized by impact energy regardless of the sphere material. But it was found that the 2mm WC sphere has a different tendency from other spheres. This reason is that the 2mm WC sphere has a different inpact damage mechanism from other spheres. The fracture positions after the 4-point bending test could be classified into 3 types according to the damage by indentation and the influence of radial cracks.