Multi-stable Auxetic Kirigami Metamaterials
By introducing cuts into planar materials, kirigami metamaterials can effectively alter their topology and deformation mechanisms. A chiral bistable kirigami metamaterial was designed with three configurations based on triangular, square, and hexagonal units. The design was fabricated as 3D-printed models, laser-cut models, and structural validation models, followed by finite element analyses. Stereographic projection and innovative hinge-angle adjustment were then used to transform the planar kirigami metamaterial into curved three-dimensional surfaces with positive, zero, and negative Gaussian curvature. Different rotational actuation mechanisms were also explored to drive the kirigami metamaterial through transitions between stable states. For details, please see our paper.