Figure 7. Meso scale level validation and prediction.

a, e fiber E₁₁ histograms for isotropic PEUU, anisotropic PEUU, VSMCs PEUU, microspheres PEUU, isotropic Dacron. In order to make comparable measurements, histograms were obtained at equi-stress of 200kPa. The width of the histograms increased with the level of anisotropy showing a higher fraction of fibers under compression (a, c isotropic materials vs. b, d anisotropic materials). As expected, higher stiffness reported for the Dacron induced tighter distribution of E_f. The ID had an impact on the peak in the E_f distribution, peak value increased with increasing ID, i.e., the denser the fiber network, the higher the E_f on a single fiber (a-d, Tab.1). Model prediction for NAR vs. strain are provided in (f-h), and compared quantitatively (f) and qualitatively (g-h) with the experimental data[19], inter fibers voids are represented in dark purple at ε_PD=ε_XD= 0% (starting configuration g-h left) and ε_PD= 40%, ε_XD= 0% (final stretched configuration g-h right) whereas the fibers are represented in magenta, figure h was readapted from[19].