Figure 5:

Multigenerational growth of fibers as described in Example 5. Cauchy stress versus (a) time, and (b) Hencky strain, showing normal stress and strain components along the loading direction, which coincides with the common orientation of all fibers. One fiber is present at the start of the analysis and the remaining three fibers are synthesized at times $t^{\left(1\right)}=0.25,t^{\left(2\right)}=0.50$ and $t^{\left(3\right)}=0.75$, respectively. Fibers behave linearly in this range of strains, but the mixture response is nonlinear due to the multigenerational growth process.