| Abstract Scope |
The 3D chiral structure, a type of mechanical metamaterial characterized by a negative Poisson's ratio, exhibits rotational behavior under axial loads. In this study, a novel 3D chiral structure composed of gammadion-shaped layers connected by inclined struts was designed, and its compression-twist capability was evaluated through finite element analysis. Compared to other 3D chiral structures, the gammadion chiral (GC) design features a torsion angle 1.75 times greater than the effective relative density and demonstrates a 17% improvement in torsion compliance. The study also found that altering the slenderness ratio, achieved by adjusting the number of layers in the axial direction, is more effective in enhancing performance than changing the height of the unit cell. Experimental validation of the GC structure was conducted using DLP printing technology to confirm its compression-torsion behavior. Furthermore, regression models were developed for the slenderness ratio and strut diameter using response surface analysis. |