On a universal description for the fracture patterns in rotating cohesive granular media

We discuss the existence of a universal description for the fracture patter ns in a small sample of cohesive granular material under axisymmetrical rot ation. This universal description can be established through a dimensionles s relation between the material parameters, the Froude number, the characte ristic lengths of the sample and the size of the fracture. We show that, fo r a xerographic developer, it is possible to plot all the experimental data given in Powders and Grains 97, by GENOVESE F. C. et al. ((A. A. Balkema, Rotterdam) 1997, p. 135) in a single universal line.