θ (˚) | P0/MPa | I0/MPa·ms | µ | β |
2 | 3.53 | 3.95 | 8.11 | 0.59 |
4 | 13.8 | 15.9 | 8.11 | 0.59 |
6 | 35.2 | 40.5 | 8.11 | 0059 |
8 | 55.2 | 63.5 | 8.11 | 0.59 |