Comparison of Self-Healing Ionomer to Aluminium-Alloy Bumpers for Protecting Spacecraft Equipment from Space Debris Impacts
| Autor: | Teo Mudric, Alessandro Francesconi, Ehsan Etemadi, Cinzia Giacomuzzo, Antonio Mattia Grande, Ugo Galvanetto, L. Di Landro, Mirco Zaccariotto |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Atmospheric Science
Materials science Perforation (oil well) Aerospace Engineering chemistry.chemical_element Ionomer Protecting capabilities Space Debris Hole size Witness Plates Momentum transfer chemistry.chemical_compound Aluminium Aluminium alloy Composite material Ballistic pendulum Astronomy and Astrophysics Debris Geophysics chemistry Space and Planetary Science visual_art visual_art.visual_art_medium General Earth and Planetary Sciences SPHERES Space debris Witness plates |
| Popis: | This paper discusses the impact behavior of a self-healing ionomeric polymer and compares its protection capability against space debris impacts to that of simple aluminium-alloy bumpers. To this end, 14 impact experiments on both ionomer and Al-7075-T6 thin plates with similar surface density were made with 1.5 mm aluminium spheres at velocity between 1 and 4 km/s. First, the perforation extent in both materials was evaluated vis-a-vis the prediction of well known hole-size equations; then, attention was given to the damage potential of the cloud of fragments ejected from the rear side of the target by analysing the craters pattern and the momentum transferred to witness plates mounted on a ballistic pendulum behind the bumpers. Self-healing was completely successful in all but one ionomer samples and the primary damage on ionomeric polymers was found to be significantly lower than that on aluminium. On the other hand, aluminium plates exhibited slightly better debris fragmentation abilities, even though the protecting performance of ionomers seemed to improve at increasing impact speed. |
| Databáze: | OpenAIRE |
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