Résumé
In this study, we explored the stability and compactness of columns formed from highlyirregular particles. These particles, known as Platonic polypods, are fashioned by extruding armsonto the faces of Platonic solids, for which we systematically varied the number and thickness ofthese arms. We investigated the emergence and vanishing of geometric cohesion (i.e., solid-like char-acteristics, in the absence of adhesive forces among particles). We first built columns by depositingparticles within a cylindrical container, which was then removed to assess the structure’s stability.Experiments employing three different materials discerned the impact of the friction coefficient be-tween grains. Our results show that specific granular systems manifest geometric cohesion, dependingupon their geometric and contact attributes. Furthermore, we measured the initial solid fraction of thecolumns, illustrating their capacity to attain stability even in markedly loose configurations.