Discrepancy between sub-critical and fast rupture roughness: a cumulant   analysis
  We study the roughness of a crack interface in a sheet of paper. We distinguish between slow (sub-critical) and fast crack growth regimes. We show that the fracture roughness is different in the two regimes using a new method based on a multifractal formalism recently developed in the turbulence literature. Deviations from monofractality also appear to be different in both regimes. 
N. Mallick, P.-P. Cortet, S. Santucci, S.G. Roux, L. Vanel