Antipodal fragment velocities for porous and weak targets at catastrophic impacts

Details Antipodal fragment velocities for porous and weak targets at catastrophic impacts Antipodal fragment velocities for porous and weak targets at catastrophic impacts

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24.1551y&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1551-1552 (SEE N94-20636 05-91

Physics

1

Collisions, Ejecta, Fragments, Hypervelocity Impact, Porous Materials, Projectiles, Targets, Velocity, Aluminum Oxides, Basalt, Impact Tests, Microstructure, Mortars (Material), Polycarbonates, Sands

Scientific paper

Mortar, porous alumina, and sand targets, which were spherical in shape and from 11 to 15 cm in diameter, were impacted normally by plastic (polycarbonate) projectiles of nearly 1 g in mass at velocities about 6 km/s. Fragment velocity at the antipole of impact site (antipodal velocity, V(sub a)), for each experiment, was obtained from two Flash X-ray images recorded prior to and at predetermined delayed time after impact event. It has been revealed that the velocities for the same E/M(sub t) (impact energy divided by target mass) depend strongly on target material, and differ about an order of magnitude between the sand and basalt.

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