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Data for specimen "ZP13-1CL"
| Spec. Id | Delta a (mm) | JD (kJ/m2) |
|---|---|---|
| ZP13-1CL | 0.0569 | 3.65 |
| ZP13-1CL | 0.0031 | 8.243 |
| ZP13-1CL | 0.0523 | 20.121 |
| ZP13-1CL | 0.0052 | 29.423 |
| ZP13-1CL | 0.1442 | 42.427 |
| ZP13-1CL | 0.3887 | 54.191 |
| ZP13-1CL | 0.8097 | 66.56 |
| ZP13-1CL | 2.3243 | 102.65 |
| ZP13-1CL | 2.4705 | 109.484 |
| ZP13-1CL | 2.7381 | 113.93 |
| ZP13-1CL | 3.0204 | 120.616 |
| ZP13-1CL | 3.3244 | 125.914 |
| ZP13-1CL | 3.5095 | 133.341 |
| ZP13-1CL | 3.7624 | 137.841 |
| ZP13-1CL | 4.1287 | 141.046 |
| ZP13-1CL | 4.4215 | 144.784 |
| ZP13-1CL | 4.638 | 148.94 |
| ZP13-1CL | 4.9667 | 148.098 |
| ZP13-1CL | 5.2491 | 148.908 |
| ZP13-1CL | 5.4662 | 150.505 |
| ZP13-1CL | 5.6932 | 150.321 |
| ZP13-1CL | 5.8609 | 151.322 |
| ZP13-1CL | 6.1476 | 145.463 |
The current fitting considered the following model : J = C×(Δa)m
The fitting uses only the data up to (Δa)lim.
The optimization method used to fit C and m is not the logarithmic fit as presented in the ASTM standard.
The method use a gradient method on m and a least square linear fit on C
Optimized values
Graphical representation
