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Initially, 17 hypervelocity experiments into SSRMS PEEK composite plates
were performed at the Hypervelocity Impact Technology Facility (HITF)
at the NASA Johnson Space Center (Houston, TX), the NASA Marshall Space
Flight Center (Tuscaloosa, AL), and the Southwest Research Institute
(San Antonio, TX). Each HVI experiment has been fully analysed which
allowed for the development of models relating damage to the projectile
and target material characteristics (namely projectile diameter, velocity,
energy, and target thickness, etc). These results are portrayed in a series
of graphs like the one below:
The graph correlates the crater diameter (Dc) produced in an impact
involving a particle of a certain energy (E), diameter (Dp), and and SSRMS composite
plate of thickness (t).
The legend details the source of the data, the target material, and the projectile
material respectively. This result is an amalgamation of the data produced
in this current research with that found in other published reports. Most projectiles
are aluminum, though some shots involve glass and nylon
projectiles. The targets are primarily PEEK/carbon fibre composite (used in the SSRMS booms). However,
some shots involving GRE targets (with similar material characteristics
as PEEK) were found to correlate well and are included in this model as well.
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