Compression-torsion conversion behavior of a cylindrical mechanical metamaterial based on askew re-entrant cells

Abstract The compression-torsion conversion (CTC) behavior of a novel cylindrical mechanical metamaterial is studied in the present paper. The structure is composed of arrayed askew re-entrant cells that originate from the traditional re-entrant cell. The effects of geometrical parameters such as the shape of askew re-entrant cells, the cell number in each layer and the radial thickness of the structure on the CTC efficiency are investigated via finite-element simulations and experiments. The numerical results indicate that the shape of the askew re-entrant cells mainly determines the CTC efficiency. Moreover, the proposed structures are fabricated utilizing additive manufacturing technology. Research results show that the cylindrical mechanical metamaterial features excellent CTC property.