Fig. 1.

Constitutive law fitting. Comparison of model (solid) and experimental (dashed) passive material properties Experimental data from Bellini et al. (2013) for different tension ratios (P) in the 1 and 2 directions. $S_{11}$ is the stress in direction 1, $S_{22}$ is the stress in direction 2, $E_{11}$ is the Green strain in direction 1 and $E_{22}$ is the Green strain in direction 2