It is the failure of these bonds that causes the softening observed in the QB stress-strain response. The ductile regimes are characterized by many bonds breaking simultaneously. Such avalanches occur over a large strain range, from the moment of softening until macroscopic failure. In case of D2 fracture, all the non-horizontal bonds of the sacrificial network, which are the elastically active bonds, are broken. In the MS model we can not differentiate between failure patterns, because the load is homogeneous throughout the system, so that stress can not concentrate and damage will always be homogeneous.

We note that both the RSN model and the MS model capture the four different mechanical responses observed in experiments on elastomers [@Millereau2018], hydrogels [@Gong2010] and macroscopic composites [@Takahashi2018; @King2019]. The clear difference in fraction of broken sacrificial bonds between (quasi)brittle and ductile responses is also well established experimentally [@Matsuda2016; @Millereau2018]. Furthermore, the softening response, which is irreversible both in our model and in the experiments, is attributed to early damage of bonds in the sacrificial network [@Vernerey2018] which has been shown to occur homogeneously throughout the network well before macroscopic failure [@Millereau2018]. Finally, also a plateau in the stress response is typically observed in 