when increasing the impact velocity were monitored and analyzed in normal and oblique impact [@agglomerate; @bk; @imp_agglo; @poto; @imp_ang].

From a more general point of view, the break-up of agglomerates presents an important class of fragmentation phenomena which is ubiquitous in everyday life and concerns a wide range of phenomena in science and technology. In general, when an object is subjected to shock or stress it will break up into smaller pieces. The length scales involved in this process range from the collisional evolution of asteroids [@asteroids] to the degradation of materials comprised of small agglomerates [@agglomerate; @bk] employed in the process industries as summarized above. There are also many geological examples associated with the use of explosives for mining and oil shale industry, coal heaps, etc. A wide variety of experiments [@self; @composite; @instable; @ice; @lab; @glassplate] and simulations [@agglomerate; @bk; @discrete; @transition; @twodisc; @granulate; @diehl; @univer; @branching; @aspect; @droplet; @britt; @poto; @simu] revealed that the fragment mass distribution is a power law except for very large fragment sizes. The exponents in the power law region were found experimentally to be between 1.35 and 2.6 depending on the effective dimensionality of the system [@asteroids; @fra_pattern; @lab; @breakup]. Recent studies 