  We present a subcritical fracture growth model, coupled with the elastic
redistribution of the acting mechanical stress along rugous rupture fronts. We
show the ability of this model to quantitatively reproduce the intermittent
dynamics of cracks propagating along weak disordered interfaces. To this end,
we assume that the fracture energy of such interfaces (in the sense of a
critical energy release rate) follows a spatially correlated normal
distribution. We compare various statistical features from the hence obtained
fracture dynamics to that from cracks propagating in sintered
polymethylmethacrylate (PMMA) interfaces. In previous works, it has been
demonstrated that such approach could reproduce the mean advance of fractures
and their local front velocity distribution. Here, we go further by showing
that the proposed model also quantitatively accounts for the complex
self-affine scaling morphology of crack fronts and their temporal evolution,
for the spatial and temporal correlations of the local velocity fields and for
the avalanches size distribution of the intermittent growth dynamics. We thus
provide new evidence that Arrhenius-like subcritical growth laws are
particularly suitable for the description of creeping cracks.
