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Impact decapitation from laboratory to basin scalesAlthough vertical hypervelocity impacts result in the annihilation (melting/vaporization) of the projectile, oblique impacts (less than 15 deg) fundamentally change the partitioning of energy with fragments as large as 10 percent of the original projectile surviving. Laboratory experiments reveal that both ductile and brittle projectiles produce very similar results where limiting disruption depends on stresses proportional to the vertical velocity component. Failure of the projectile at laboratory impact velocities (6 km/s) is largely controlled by stresses established before the projectile has penetrated a significant distance into the target. The planetary surface record exhibits numerous examples of oblique impacts with evidence fir projectile failure and downrange sibling collisions.
Document ID
19920001640
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Schultz, P. H. (Brown Univ. Providence, RI., United States)
Gault, D. E. (Murphys Center of Planetology CA., United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1991
Publication Information
Publication: NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990
Subject Category
Lunar And Planetary Exploration
Accession Number
92N10858
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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