Designations Independent Dependent | Equation of Curves | R2 | σ | ||
| Variable, y | Variable, x | |||
70TFA | Stress | Strain | y = −1.411x2 + 0.487x − 0.013 | 0.973 | 0.25 |
60TFA | Stress | Strain | y = −1.572x2 + 0.527x − 0.014 | 0.984 | 0.25 |
50TFA | Stress | Strain | y = −1.423x2 + 0.499x − 0.012 | 0.979 | 0.19 |
10C | Stress | Strain | y = −0.842x2 + 0.402x − 0.010 | 0.984 | 0.12 |
15C | Stress | Strain | y = −0.946x2 + 0.443x − 0.010 | 0.968 | 0.31 |
20C | Stress | Strain | y = −0.351x2 + 0.263x − 0.003 | 0.967 | 0.37 |