Auxetic materials, a class of metamaterials with negative Poisson’s ratio, have been extensively studied due to their attractive mechanical properties. In this study, an auxetic material was developed using new perforation shapes with stiffeners. Standard elliptical perforations were stiffened and analyzed by the finite-element method. Periodic boundary conditions were applied to the unit cell of the new shapes and their effective Poisson’s ratio and Young’s modulus were calculated. The finite-element analysis found that the proposed stiffened perforated sheets exhibited auxetic behavior and had enhanced stiffness compared with standard elliptically perforated sheets.

辅助材料是一类具有负泊松比的超材料，由于其具有吸引力的机械性能而被广泛研究。在这项研究中，使用带有加强筋的新型穿孔形状开发了一种膨胀材料。标准的椭圆孔被加固，并通过有限元方法进行分析。将周期性边界条件应用于新形状的晶胞，并计算它们的有效泊松比和杨氏模量。有限元分析发现，与标准的椭圆形穿孔板相比，所建议的加硬穿孔板表现出拉力行为，并具有增强的刚度。