NDLI: Ejecta- and size-scaling considerations from impacts of glass projectiles into sand

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Ejecta- and size-scaling considerations from impacts of glass projectiles into sand

Content Provider	NASA Technical Reports Server (NTRS)
Author	Cintala, M. J. Siebenaler, S. A. Barnouin-Jha, O. S.
Copyright Year	2007
Description	One of the most promising means of learning how initial impact conditions are related to the processes leading to the formation of a planetary-scale crater is through scaling relationships.1,2,3 The first phase of deriving such relationships has led to great insight into the cratering process and has yielded predictive capabilities that are mathematically rigorous and internally consistent. Such derivations typically have treated targets as continuous media; in many, cases, however, planetary materials represent irregular and discontinuous targets, the effects of which on the scaling relationships are still poorly understood.4,5 We continue to examine the effects of varying impact conditions on the excavation and final dimensions of craters formed in sand. Along with the more commonly treated variables such as impact speed, projectile size and material, and impact angle,6 such experiments also permit the study of changing granularity and friction angle of the target materials. This contribution presents some of the data collected during and after the impact of glass spheres into a medium-grained sand.
File Size	85993
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20070006745
Archival Resource Key	ark:/13960/t6xw9d221
Language	English
Publisher Date	2007-01-01
Access Restriction	Open
Subject Keyword	Geophysics Sands Cratering Ejecta Friction Projectiles Glass Predictions Excavation Planetary Craters Planetary Composition Anderson J. L. B. Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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