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LDEF data: Comparisons with existing modelsThe relationship between the observed cratering impact damage on the Long Duration Exposure Facility (LDEF) versus the existing models for both the natural environment of micrometeoroids and the man-made debris was investigated. Experimental data was provided by several LDEF Principal Investigators, Meteoroid and Debris Special Investigation Group (M&D SIG) members, and by the Kennedy Space Center Analysis Team (KSC A-Team) members. These data were collected from various aluminum materials around the LDEF satellite. A PC (personal computer) computer program, SPENV, was written which incorporates the existing models of the Low Earth Orbit (LEO) environment. This program calculates the expected number of impacts per unit area as functions of altitude, orbital inclination, time in orbit, and direction of the spacecraft surface relative to the velocity vector, for both micrometeoroids and man-made debris. Since both particle models are couched in terms of impact fluxes versus impactor particle size, and much of the LDEF data is in the form of crater production rates, scaling laws have been used to relate the two. Also many hydrodynamic impact computer simulations were conducted, using CTH, of various impact events, that identified certain modes of response, including simple metallic target cratering, perforations and delamination effects of coatings.
Document ID
19930020186
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Coombs, Cassandra R. (POD Associates, Inc. Albuquerque, NM, United States)
Watts, Alan J. (POD Associates, Inc. Albuquerque, NM, United States)
Wagner, John D. (POD Associates, Inc. Albuquerque, NM, United States)
Atkinson, Dale R. (POD Associates, Inc. Albuquerque, NM, United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1993
Publication Information
Publication: NASA. Langley Research Center, LDEF: 69 Months in Space. Second Post-Retrieval Symposium, Part 2
Subject Category
Spacecraft Design, Testing And Performance
Accession Number
93N29375
Funding Number(s)
OTHER: SDIO-SC-02N0165768
PROJECT: POD PROJ. 019201
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19930020165Collected WorksLDEF: 69 Months in Space. Second Post-Retrieval Symposium, part 2
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