Table 2 Comparison of mechanical behavior between damage models and experiments (sample size for each cell = 20). All strain values are reported as Lagrange strain.
Longitudinal | Transverse | |||||
|---|---|---|---|---|---|---|
Experiment | Model (von Mises stress) | Model (max normal strain) | Experiment | Model (von Mises stress) | Model (max normal strain) | |
Ultimate tensile force (N) | 2.25 ± 1.42 | 2.25 ± 1.41 | 2.23 ± 1.39 | 0.100 ± 0.066 | 0.103 ± 0.068 | 0.100 ± 0.066 |
Ultimate tensile stretch (grip-to-grip) | 1.155 ± 0.052 | 1.153 ± 0.053 | 1.155 ± 0.052 | 1.493 ± 0.214 | 1.491 ± 0.212 | 1.491 ± 0.216 |
Normal strain Eyy (tear region at UTS) | 0.29 ± 0.14 | 0.26 ± 0.11 | 0.27 ± 0.10 | 3.64 ± 3.30 | 1.00 ± 0.46* | 1.02 ± 0.54* |
Normal strain E (tear region at UTS) | 0.01 ± 0.16 | − 0.09 ± 0.07* | − 0.07 ± 0.03* | − 0.21 ± 0.31 | − 0.15 ± 0.06 | − 0.15 ± 0.06 |
Shear strain E (tear region at UTS) | 0.20 ± 0.10 | 0.14 ± 0.12 | 0.09 ± 0.06* | 0.529 ± 0.620 | 0.017 ± 0.011* | 0.015 ± 0.008* |
1st principle strain (tear region at UTS) | 0.42 ± 0.14 | 0.31 ± 0.16* | 0.29 ± 0.12* | 3.78 ± 3.35 | 1.00 ± 0.46* | 1.02 ± 0.54* |
2nd principle strain (tear region at UTS) | − 0.13 ± 0.10 | − 0.14 ± 0.12 | − 0.10 ± 0.05 | − 0.34 ± 0.08 | − 0.15 ± 0.06* | − 0.15 ± 0.06* |
Max shear strain (tear region at UTS) | 0.28 ± 0.10 | 0.23 ± 0.13 | 0.19 ± 0.08* | 2.06 ± 1.70 | 0.57 ± 0.25* | 0.59 ± 0.29* |