Mechanical properties and energy absorption of rib-reinforced arc curved crease origami metamaterials

The rib-reinforced arc curved crease origami (Ribbed ACCO) metamaterial is proposed in this article to enhance out-of-plane mechanical properties and energy absorption through rib buckling and plastic deformation, addressing the deficiency of traditional origami metamaterials. This study aims to thoroughly examine the influence of various parameters on the mechanical properties of Ribbed ACCO and its functionally graded counterpart. The mechanical properties of these metamaterials are meticulously analyzed through experiments and numerical simulations, focusing on the effects of different shell angles, central angles, and rib thicknesses under both in-plane and out-of-plane compression conditions. The findings reveal that the central angle and rib thickness significantly enhance energy absorption and performance compared to conventional ACCO structures. Moreover, the functionally graded structure demonstrates superior energy absorption efficiency over the uniform structure. The design of Ribbed ACCO achieves comparable mechanical properties in both in-plane and out-of-plane directions, offering new inspiration for the design and application of origami-inspired metamaterials. Introduced Ribbed ACCO metamaterial with enhanced strength, stiffness, and energy absorption under compression. Combined experiments and simulations to assess in-plane and out-of-plane compression responses, providing insights into key parameters. Enhanced out-of-plane mechanical properties and energy absorption through rib buckling and plastic deformation. Unidirectional linear gradients enhance mechanical properties and energy absorption, outperforming other gradient types.