Strong Compression–Torsion Coupling Effect in Chiral Hyperbolic Metamaterials

A novel chiral hyperbolic compression–torsion coupling metamaterial (CHCTM) is designed based on the bionic concept and fabricated using laser powder bed fusion (L‐PBF). The mechanical properties of the CHCTM are studied through experiments and numerical simulations. The influences of the structural height, end configuration size, strut diameter, and strut connection mode (vertex distribution, edge midpoint distribution, and hybrid mode) on the torsion angle, energy absorption (EA), specific energy absorption (SEA), mean crushing force (MCF), crushing force efficiency (CFE), and energy absorption efficiency ( K S ) are investigated. The design parameters have significant regulatory effects on the SEA, CFE, and MCF of the CHCTM. The excellent load‐bearing capacity and torsional angle variation of the CHCTM are influenced by the main deformation characteristics during compression. In addition, the hybrid mode results in the most uniform strain distribution and achieves a higher crushing force level than the vertex and edge midpoint distribution modes. Furthermore, compared with similar mechanical metamaterials reported in the literature, the proposed chiral hyperbolic compression‐torsion coupling metamaterial demonstrates superior synergistic performance in terms of the compressive modulus (up to 89,461% increase) and torsion angle (up to 390% increase). This study provides a promising approach to the design of multifunctional mechanical metamaterials.