We propose in this work an innovative hybrid auxetic metamaterial with a centersymmetric unit cell and tessellation topology similar to the one provided by the missing rib configuration. The tessellation proposed is applied to different core unit cells (star shape, cross-chiral shape with same dimensions, and reentrant). The effects of the geometric parameters of the cells on the in-plane mechanical properties of this hybrid auxetic metamaterial system are investigated via finite elements (FEMs). Representative unit cells (RUCs) with optimal mechanical behaviors are identified; those configurations exhibit the larger negative Poisson’s ratios and enhanced specific moduli. Designs related to two groups of auxetic metastructures with cylindric and cubic shapes are then developed based on the optimized RUCs along x and y directions. The equivalent mechanical performance of these metastructures under internal pressure is evaluated from a numerical standpoint. Auxetic cylindrical metastructures can be tailored by adjusting the number of the optimized RUCs along the circumferential and longitudinal directions, together with the geometric parameters of the optimized RUC itself. These hybrid auxetic metamaterials and metastructures provide the potential for multifunctional applications in biomechanics, flexible electronics, and aerospace.

我们在这项工作中提出了一种具有中心对称晶胞和棋盘形拓扑结构（类似于缺少的肋骨配置所提供的拓扑结构）的创新型混合型拉胀超材料。提出的镶嵌技术可应用于不同的核心晶胞（星形，具有相同尺寸的手征形和可折角形）。通过有限元（FEM）研究了单元的几何参数对这种混合型膨胀超材料系统的面内力学性能的影响。确定具有最佳机械性能的代表性晶胞（RUC）；这些构型表现出更大的负泊松比和增强的比模量。然后，基于沿x的优化RUC，开发了与圆柱和立方形状的两组膨胀亚结构有关的设计。和y方向。从数值的角度评估了这些内部结构在内部压力下的等效机械性能。可以通过沿圆周和纵向方向调整优化的RUC的数量以及优化的RUC本身的几何参数来调整辅助圆柱状的元结构。这些混合的膨胀型超材料和元结构为生物力学，柔性电子学和航空航天中的多功能应用提供了潜力。