Local friction effect of the global behaviour of granular media

In this study it has first been put in evidence, that the privileged paths of transmission of forces pass by the most resistant kernels and, after the latter are broken by shear, the net of forces paths is modified. and fluctuations appear in each curve. As in this type of material, the solicitations in the shear plane used entirely the internal friction angle, when the latter takes its limit state. , the global friction is rather independent of local friction, and when the local friction of a material is lower, its global friction is greater than the local one and vice versa. Science Ltd.