Study on the Compressive Performance and Energy Absorption of a Novel Concave‐Chiral Hybrid Honeycomb Structure

Negative Poisson's ratio (NPR) structures, as representatives of advanced lightweight honeycomb materials, have demonstrated broad application prospects in aerospace, civil engineering, and biomedical fields due to their unique deformation mechanisms and energy absorption potential. This article proposes a novel t2D, centrally symmetric, concave‐chiral hybrid honeycomb (CSCHH) exhibiting an NPR effect. This structure is constructed by adding vertical ribs at the nodes of the traditional re‐entrant hexagonal (TRH) to form a “hollow bamboo” honeycomb, which is then combined with chiral units. The compressive performance of the structure was systematically evaluated through axial compression experiments and finite element simulations, with experimental results validating the accuracy and applicability of the finite element model. Compared to the TRH, the CSCHH structure improves the platform stress and energy absorption capacity by 203% and 146.4%, respectively, while demonstrating a stable NPR effect. Based on orthogonal simulation experiments, the influence of geometric parameters such as the height and width of the concave inclined rods and the radius of the rings on the quasi‐static compressive performance of the CSCHH unit was analyzed. This study provides a theoretical basis for design and energy absorption of NPR materials, and indicates that CSCHH possesses excellent mechanical properties and broad engineering prospects.