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Modelling hypervelocity impacts into aluminum structures based on LDEF dataRealizing and understanding the effects of the near-Earth space environment on a spacecraft during its mission lifetime is becoming more important with the regeneration of America's space program. Included among these potential effects are the following: erosion and surface degradation due to atomic oxygen impingement; ultraviolet exposure embrittlement; and delamination, pitting, cratering, and ring formation due to micrometeoroid and debris impacts. These effects may occur synergistically and may alter the spacecraft materials enough to modify the resultant crater, star crack, and/or perforation. This study concentrates on modelling the effects of micrometeoroid and debris hypervelocity impacts into aluminum materials (6061-T6). Space debris exists in all sizes, and has the possibility of growing into a potentially catastrophic problem, particularly since self-collisions between particles can rapidly escalate the number of small impactors. We have examined the morphologies of the Long Duration Exposure Facility (LDEF) impact craters and the relationship between the observed impact damage on LDEF versus the existing models for both the natural (micrometeoroid) and manmade (debris) environments in order to better define these environments.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Coombs, C. R.
(POD Associates, Inc. Albuquerque, NM, United States)
Atkinson, D. R.
(POD Associates, Inc. Albuquerque, NM, United States)
Watts, A. J.
(POD Associates, Inc. Albuquerque, NM, United States)
Wagner, J. R.
(POD Associates, Inc. Albuquerque, NM, United States)
Allbrooks, M. K.
(POD Associates, Inc. Albuquerque, NM, United States)
Hennessy, C. J.
(POD Associates, Inc. Albuquerque, NM, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F
Subject Category
Structural Mechanics
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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