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Regolith evolution in the laboratory - Scaling dissimilar comminution experimentsRepeated impacts into fragmental targets simulating unconsolidated debris on planetary surfaces have provided empirical insight into the evolution of planetary regoliths. The techniques of dimensional analysis have been employed to quantify and examine the relationships between the more important variables in the evolution of these experimental regoliths. Application of this method to the results of 10 experimental series shows that the quantity of comminuted target mass is directly proportional to (1) the number of impacts, (2) the diameter of the projectile, (3) the mean size of the crystals, (4) the mean grain size of the evolving regolith, (5) the total target mass, (6) the impactor density, and (7) the ratio of the impact velocity to the velocity of sound in the target rock. The comminuted mass is inversely proportional to the density of the target rock and the sorting of the regolith.
Document ID
19900042782
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Cintala, Mark J.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Horz, Friedrich
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 14, 2013
Publication Date
March 1, 1990
Publication Information
Publication: Meteoritics
Volume: 25
ISSN: 0026-1114
Subject Category
Lunar And Planetary Exploration
Accession Number
90A29837
Distribution Limits
Public
Copyright
Other

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