Fig. 7.

Material properties of co-gels from the experiment (■, solid lines) compared with model predictions from the parallel (▲, dashed lines) and series (●, dotted lines) models. Parallel models reflect properties in the hypothetical region (defined in Fig. 6) beyond the failure strain of collagen. In general, both models are able to predict trends in the strain energy density, tangent modulus, and transition strain. The experimental data is bracketed by the parallel and series models in the UTS, strain energy density, and tangent modulus. Models predict the apparent Poisson's ratio on the same order of magnitude as the experiment. Error bars represent 95% CI; n ≥ 5 gels for experiments, n ≥ 6 networks for models.