| 有效应力/MPa | 拟合关系 | 相关系数R2 |
| 4 | y = 7.8241e−1.54x | 0.9454 |
| 5 | y = 6.4756e−1.348x | 0.9562 |
| 6 | y = 6.4297e−1.491x | 0.9587 |
| 7 | y = 6.2636e−1.512x | 0.9674 |
| 8 | y = 6.0508e−1.504x | 0.9748 |