un projectile en milieu granulaire Cette étude a fait en 2009 l'objet d'une publication dans Europhysics Letters [79] qui est reproduite en l'état ci-après. Cet article présente les résultats issus de simulations numériques 2D d'impact eectuées par un code de dynamique moléculaire. On y décrit dans un premier temps la méthode employée (présentée également dans le chapitre 2), puis on décrit l'ensemble des résultats obtenus. Les résultats concernent trois aspects de la pénétration : la profondeur nale de pénétration ?, la force exercée par le milieu granulaire sur le projectile et enn le temps d ,
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