Table 4 Percentage increase/decrease in mode I fracture energy of the CNT/epoxy with volume fraction compared to CF/epoxy composite at a constant CF volume fraction of 60%
Material | Laminate configuration | Volume fraction (%) | Δa (mm) | ΔA (N mm) | GI (J/mm2) | % increase/decrease in GI (%) |
|---|---|---|---|---|---|---|
CF/epoxy | [0/0/0/0] | 60 | 58.50 | 285.246 | 0.24380 | – |
CNT/epoxy | [0/0/0/0] | 15 | 62.50 | 295.914 | 0.23673 | − 2.89 |
30 | 53.50 | 402.931 | 0.37657 | 54.46 | ||
60 | 46.00 | 614.285 | 0.66770 | 173.87 | ||
CF/epoxy | [0/90/0/90] | 60 | 56.50 | 239.351 | 0.21181 | – |
CNT/epoxy | [0/90/0/90] | 15 | 55.25 | 235.798 | 0.21339 | 0.75 |
30 | 57.75 | 296.463 | 0.25667 | 21.18 | ||
60 | 52.50 | 419.856 | 0.39986 | 88.78 | ||
CF/epoxy | [0/30/–30/90] | 60 | 55.75 | 236.373 | 0.21199 | – |
CNT/epoxy | [0/30/–30/90] | 15 | 57.00 | 240.932 | 0.21134 | − 0.30 |
30 | 58.50 | 301.509 | 0.25770 | 21.56 | ||
60 | 51.75 | 407.321 | 0.39354 | 85.64 |