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Étude et modélisation d'impacts hautes et basses vitesses sur des matériaux et structures de satellites

Abstract : The protection of satellite against the threat of space debris hypervelocity impacts requires the development of protective structures, which have to be strong, lightweight and suited to the space environment. In order to meet this challenge, attention was turned to the integration of innovative material inside multi-shock shields, usually called Whipple Shield. These structures benefit from the progressive fragmentation and expansion of the projectile during its impact on successive shields. In this work, attention was focused on the comprehension of the phenomena involved during such impacts as well as their numerical modelling. First of all, all the materials under study were characterized through multiple experiments such as high velocity impacts, laser induced shocks and electrons beam induced shock. Based on literature data and dynamics tests, a numerical modelling of the materials was developed and confronted with experiments results. Impacts simulations with the codes HESIONE and LS-DYNA provided relevant results in terms of shapes and velocities of the debris clouds induced by the impacts, when compared with experimental results. They also brought satisfying results concerning sizes of the debris inside the clouds. These simulations strengthen our knowledges about the materials behavior under dynamic loading. Based on numerical and experimental results, an analysis was conducted in order to identify pros and cons of each material and furnish quantitative and qualitative information, useful for a protective structure concept phase. An optimization of a structure was finally proposed, which furnished a potential lightweight structure for protection against a wide range of projectiles and impacts velocities.
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Submitted on : Thursday, April 14, 2022 - 2:18:16 PM
Last modification on : Tuesday, April 19, 2022 - 2:12:42 PM


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  • HAL Id : tel-03641686, version 1


Vincent Jaulin. Étude et modélisation d'impacts hautes et basses vitesses sur des matériaux et structures de satellites. Matériaux et structures en mécanique [physics.class-ph]. ENSTA Bretagne - École nationale supérieure de techniques avancées Bretagne, 2021. Français. ⟨NNT : 2021ENTA0004⟩. ⟨tel-03641686⟩



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