Table 8.
Comparison between the initial damage length evaluated by means of mathematical formulation for Mode I and II.
| (a) Mode I | ||||
|---|---|---|---|---|
| Thickness | Surface | Volume | Porosity Rate | Initial Damage Length |
| t (mm) | S (mm2) | V (mm3) | ρ(l0) | l0 (mm) |
| 1 | 254 | 254 | 9.91 | 13.61 |
| 154 | 154 | 8.58 | 10.97 | |
| 79 | 79 | 6.77 | 8.10 | |
| 2.5 | 254 | 636 | 5.08 | 14.79 |
| 154 | 385 | 3.43 | 10.97 | |
| 79 | 196 | 2.86 | 8.25 | |
| 5 | 254 | 3185 | 1.21 | 15.66 |
| 154 | 1924 | 0.78 | 11.47 | |
| 79 | 982 | 0.51 | 8.41 | |
| (b) Mode II | ||||
| Thickness | Surface | Volume | Porosity Rate | Initial Damage Length |
| t (mm) | S (mm2) | V (mm3) | ρ(l0) | l0 (mm) |
| 4 | 460 | 1840 | 3.70 | 18.94 |