Résumé
By means of Peridynamic simulations [1], we investigate the breakage mechanics of particles under he action of external forces. The particles have an internal texture composed of a distribution of cleavages (micro-cracks), representing the natural inhomogeneity of the particles. Mechanical tests were performed on 2D disks under quasi-static diametral compression for different particle sizes and distributions of microcracks [2]. The evolution of yield stress with diameter and the probability of failure in terms of Weibull distributions are investigated. A floodfill algorithm capable of determining the fragment size distribution after failure allows us toanalyse the median fragment size as a function of the initial density of cleavage. We employ the same methodology to quantify the effect of the impact energy by varying either the mass or the velocity of an impactor.References[1] X. Frank, J.-Y. Delenne, S. Nezamabadi, F. Radjaï, Strength and fracture of porous, granular and cellular materials by peridynamic simulations, submitted.[2] N. Blanc, X. Frank, C. Mayer-Laigle, F. Radjaï and J.-Y. Delenne, Peridynamics simulation of the comminution of particles containing microcraks, EPJ Web of Conferences 140, 07018 (2017)