Tanner, W.G. and McDonnell, J.A.M. and Yano, H. and Fitzgerald, H.J. and Gardner, D.J. (1995) Meteoroids And Space Debris Hypervelocity Impact Penetrations In LDEF Map Foils Compared With Hydrocode Simulations. In: B1 Symposium and B1.1, B1.3 Meetings of COSPAR Scientific Commission B, at the 13th COSPAR Scientific Assembly, Jul 11-21, 1994, Hamburg, Germany.
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The continued analyses of penetrating impacts on MAP foils of Aluminium and Brass have produced data for several LDEF faces, i.e., Space, West, and East. These data have immediate bearing on the interpretation and design of devices to detect the penetration of a thin metallic firm by a dust grain which have been tested both in the laboratory and in space. A crucial component of the analysis has been the theoretical calculation utilizing CTH, a Sandia National Laboratory Hydrodynamic computer code/1/ to assess the parameters of the hypervelocity penetration event. In particular theoretical hydrodynamic calculations have been conducted to simulate the hypervelocity impact event where various cosmic dust grain candidates, e.g., density = 0.998, 2.700, 7.870 (gm/cm(3)), and velocities, i.e., 7 - 16 km/s, have been utilized to reproduce the events. Theoretical analyses of hypervelocity impact events will be reported which span an extensive matrix of values for velocity, density and size. Through a comparison between LDEF MAP foil measurements and CTH hydrocode calculations these analyses will provide an interpretation of the most critical parameters measured for space returned materials, i.e., for thin films, the diameter of the penetration hole, D-h, and for semi-infinite targets, the depth-to-diameter ratio of craters, D-c/T-c. An immediate consequence of a comparison, of CTH calculations with space exposed materials will be an enhancement of the coherent model developed by UKC-USS researchers to describe penetration dynamics associated with LDEF MAP foils.
|Item Type:||Conference or workshop item (Paper)|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences|
|Depositing User:||I.T. Ekpo|
|Date Deposited:||25 Oct 2009 10:11|
|Last Modified:||25 Oct 2009 10:11|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/19080 (The current URI for this page, for reference purposes)|
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