abstract
- Architected matter could bring advantages that their fully solid counterparts cannot. Understanding their mechanics unveils key elements affecting the overall structure deformation and offers insights into structural behavior. Here, architected cylinders made from hexagonal and re-entrant cellular structures were parameterized in both rectangular and cylindrical cell arrangements. In the latter, the number of rotational degrees of symmetry was varied to evaluate their effect on the structure-deformation mechanism relationship. The analysis on diametrically compressed 3D printed architected cylinders revealed that designs with 7 arcs required three times the load applied to the designs with 4 arcs to achieve the same displacement. Also, the load required by designs in a cylindrical cell arrangement was between 60% and 90% of that applied to their counterparts in a rectangular cell arrangement. Deformation of the external geometry was characterized by evaluating their circularity, which behavior was later linked to the displacement trajectories followed by the nodes of unit cells. A curvature-based approach was proposed to quantify the deformation at the cell wall level, comparing the area under the curvature function of a deformed cell wall with the area of the undeformed one. This approach demonstrated to be advantageous for micro-characterization. © 2025 Elsevier Ltd