Auxetic structures have become one of the most studied types of cellular structure in recent years, thanks to their highly specific mechanical properties. Most microstructures are designed with homogeneous properties in their main axes; however, in this research, we propose an innovative asymmetric 3D auxetic structure based on a 2D configuration of cells drawn from the literature. The new auxetic cell is designed by topology analysis using classical Timoshenko beam theory. To validate the design, samples were constructed by fused filament fabrication with ABSplus, and tested under quasi-static compression to determine Young's modulus in the three orthogonal directions. The experimental results show good agreement with the topological analysis and reveal that the proposed cell can transmit a different mechanical behavior to the macrostructure in its three orthogonal directions.

由于其高度特定的机械性能，拉胀结构已成为近年来研究最多的细胞结构类型之一。大多数微观结构的设计在其主轴上具有均匀的特性；然而，在这项研究中，我们提出了一种创新的非对称 3D 拉胀结构，该结构基于从文献中提取的细胞的 2D 配置。新的拉胀单元是通过使用经典 Timoshenko 梁理论的拓扑分析设计的。为了验证设计，样品是通过使用ABSplus 的熔丝制造来构建的，并在准静态压缩下进行测试以确定三个正交方向的杨氏模量。实验结果表明与拓扑分析非常吻合，并表明所提出的电池可以在其三个正交方向上将不同的力学行为传递给宏观结构。