Use of the full-network model at the highlight of the logarithmic strain measure

Suitably defined invariants of the logarithmic strain are shown to be more adequate than the usual invariants of the right Cauchy-Green tensor to define the type and intensity of a strain applied to hyperelastic rubber-like materials. Coupling these invariants with the application of the macromolecular full-network model clarifies some features of the state of strain dependence of these materials. Actually, loading conditions may be classified in terms of the rate of extended chains and the mean extension of the chains. Finally comparisons of the model with experimental data illustrate the efficiency of the full-network model and the dependence of the material parameters on the applied loading history.