Research Article
Fabrication and Experimental Estimation of Mechanical Properties of Kevlar-Glass/Epoxy Interwoven Composite Laminate
Table 8
Mode-1 fracture test results.
| Orientation | Load P (N) | Length W (mm) | Thickness B (mm) | Crack length A (mm) | Fracture toughness K (MPa) | Average fracture toughness (MPa) |
| 1 × 1 | 1,410 | 31.6 | 3.2 | 14 | 373.27 | 552.43 | 1,455 | 32.5 | 2.8 | 13.2 | 668.17 | 1,470 | 31.3 | 3 | 11 | 555.04 | 1,355 | 32.9 | 3.1 | 14.7 | 613.24 |
| 3 × 3 | 1,365 | 32.5 | 3.1 | 11 | 464.61 | 513.13 | 1750 | 31.6 | 2.8 | 10 | 635.09 | 1,035 | 32.2 | 3 | 14.5 | 504.28 | 1,055 | 32.6 | 2.9 | 13 | 448.54 |
| 5 × 5 | 1520 | 32.5 | 2.9 | 14 | 720.11 | 589.94 | 1,180 | 31.2 | 2.8 | 11 | 478.04 | 1905 | 31.8 | 3 | 12 | 769.23 | 1,190 | 32.5 | 3.2 | 10.9 | 392.39 |
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