Evolution of particle breakage studied using x-ray tomography and the discrete element method Zeynep Karatza, Edward Andò, Stefanos-Aldo Papanicolopulos, Gioacchino Viggiani and Jin Y. Ooi EPJ Web Conf., 140 (2017) 07013 Published online: 30 June 2017 DOI: 10.1051/epjconf/201714007013