A comparative analysis of the in-plane energy absorption capacities of auxetic structures

In-plane dynamic behaviors of the double arrowhead, re-entrant honeycomb, chiral, missing rip, and star-shaped auxetic cellular structures were investigated using finite element analyses. An analytical model available in the literature was employed to validate the proposed finite element models. The finite element model was used to investigate the energy absorption capacities of the auxetic cellular structures, in addition to the mean and peak dynamic crushing forces. The results indicated that the chiral auxetic structure not only absorbed the most energy but also exhibited the largest mean crushing force under the same dynamic crushing conditions. In contrast, re-entrant honeycomb structures absorb the least energy, owing to the smallest mean crushing forces among all the cellular structures. This study provides insights into the dynamic deformation behavior and energy absorption capabilities of various auxetic cellular structures.