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Understanding the collisional fragmentation and subsequent reaccumulation offragments is crucial for studies of the formation and evolution of thesmall-body populations. Using an SPH / N-body approach, we investigate thesize-frequency distributions (SFDs) resulting from the disruption of 100km-diameter targets consisting of porous material, including the effects ofpore-crushing as well as friction. Overall, the porous targets have asignificantly higher impact strength (Q*D) than the rubble-pile parent bodiesinvestigated previously (Benavidez et al., 2012) and show a behavior moresimilar to non-porous monolithic targets (Durda et al., 2007). Our results alsoconfirm that for a given specific impact energy, the SFDs resulting from aparent body disruption are strongly dependent on the size scale.

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Fragment properties from large-scale asteroid collisions: I: Results  from SPH/N-body simulations using porous parent bodies and improved material  models