Experimental Simulations of Large-Scale Collisions

Details Experimental Simulations of Large-Scale Collisions Experimental Simulations of Large-Scale Collisions

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002stin...0246819h&link_type=abstract

Technical Report, Boeing Co. Seattle, WA United States

Mathematics

Asteroids, Asteroid Collisions, Projectile Cratering, Meteorite Craters, Porosity, Computerized Simulation, Ejecta, Porous Materials, Centrifuges

Scientific paper

This report summarizes research on the effects of target porosity on the mechanics of impact cratering. Impact experiments conducted on a centrifuge provide direct simulations of large-scale cratering on porous asteroids. The experiments show that large craters in porous materials form mostly by compaction, with essentially no deposition of material into the ejecta blanket that is a signature of cratering in less-porous materials. The ratio of ejecta mass to crater mass is shown to decrease with increasing crater size or target porosity. These results are consistent with the observation that large closely-packed craters on asteroid Mathilde appear to have formed without degradation to earlier craters.

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