Inclined‐Strut Optimized Mechanical Metamaterials with Enhanced Compression–Torsion Conversion Efficiencies

Abstract

Herein, two improved compression–torsion conversion (CTC) mechanical metamaterials are proposed with arrayed‐type and cylindrical shell‐type based on the optimization design of an inclined strut. Compared with the original design, improvements in CTC performance can be achieved by optimization of the strut shape in the feasible region. The CTC properties of the optimized metamaterials are studied by theoretical calculations, finite‐element simulations, and experiments. The effects of the shape coefficients of the S‐strut on the optimization efficiencies are discussed. The optimized structures significantly improve the mechanical properties of the CTC mechanical metamaterials. The optimized S‐strut metamaterials are increased by more than 25% higher CTC efficiencies than the original structures. The structures have improved CTC properties and are closer to the application. In addition, the proposed S‐strut mechanical metamaterials have a promising application in the aerospace field.