Figure 2.
Axial stress Pzz as a function of axial stretch λ. Results predicted by the (a) affine (εs = 4.14 × 10−6) and three-chain (εs = 4.53 × 10−6) models, as well as by the (b) eight-chain (εs = 0.5) and micro-sphere (εs = 0.25) models, are shown for collagen networks. The experimental data of Roeder et al. [45] are also displayed. The corresponding results are also shown for fibrin networks, including predictions of the (c) affine (εs = 0.506) and three-chain (εs = 0.514) models, as well as of the (d) eight-chain (εs = 0.323) and micro-sphere (εs = 0.248) models. The corresponding experimental data of Purohit et al. [46] are also shown. Note that εs = λs − 1 denotes the critical strain for fibre stiffening (obtained by data fitting).