We have studied the effects of shattering in grain-grain collisions. Based upon extensive
numerical simulation of surface explosions and impacts, an analytical model has been
developed which relates the final crater mass and fragment size distribution to the relative
collision velocity, grain sizes, and material properties of projectile and target. Our model
contains one free parameter, the critical shock pressure for shattering. We have compared
the calculated crater masses to laboratory experiments on (sub) micron-sized particle …