Energy Absorption in a Rotating Rigid Honeycomb Based on Reinforced Ribbed Plates

This article proposes a rotationally reinforced ribbed honeycomb structure by incorporating struts into the rotationally rigid honeycomb to enhance its stiffness. Finite element models of the honeycomb are developed using Abaqus/Explicit and validated through quasistatic experiments for accuracy. Based on the models, a series of studies on the honeycomb's structural behavior are conducted. Initially, the mechanical properties of the honeycomb under varying loading conditions and rib angles are analyzed. The results indicate that the RSH-45 configuration exhibits the most favorable mechanical properties under both X-direction and Y-direction loading conditions. Specifically, under impact in the X-direction, the RSH-45 and RSH-60 configurations demonstrate increases in energy absorption of 114.64% and 96.9%, respectively, compared to the RSH-90 configuration. Subsequently, the mechanical properties of the RSH at different impact velocities are examined. The negative Poisson's effect of the RSH is most pronounced at low-velocity, with the deformation modes changing as velocity increases. Under medium-velocity impacts, RSH-45 and RSH-60 configurations exhibit a significant negative Poisson's ratio effect, while RSH-75 and RSH-90 configurations display a positive effect. In summary, reinforcing ribs produces a significant negative Poisson's ratio effect only at specific angles.