Résumé
The capillary cohesion in granular media is studied at the local scale of a doublet of particles by theoretical and experimental ways. An explicit relation is proposed to describe the cohesive force as a function of the characteristics of the doublet. Taking into account contact, capillarity, and rupture aspects, a local cohesive law is established. This law is integrated in a 3D numerical code in order to estimate the influence of the local cohesion on the macroscopic behaviour of granular media.