Abstract A novel class of chiral structures having intersecting ligaments acting as the node is presented in this study. Depending on the geometric parameters, this arrangement may allow both the ligaments connecting the nodes together as well as the ligaments that compose the node itself to bend upon the application of a uniaxial force. Hence, such structures are capable of deforming through two distinct mechanisms, i.e. bending of the ligaments between the nodes and bending of the ligaments in the nodes. The novel six ligament (hexa) arrangement, a structure derived from the hexachiral, was chosen for the purpose of investigating these novel designs. This was studied through the use of finite element simulations and mechanical testing of 3D printed specimens. Analysis of the results supports the suggestion that a hierarchical deformation system exist. The value of the Poisson's ratio was found to be dependent on the relative thickness of the respective ligaments.

中文翻译：

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Starchirals——一类新型的拉胀层级结构

摘要 本研究提出了一类具有交叉韧带作为节点的新型手性结构。根据几何参数，这种布置可以允许将节点连接在一起的韧带以及构成节点本身的韧带在施加单轴力时弯曲。因此，这种结构能够通过两种不同的机制变形，即节点之间韧带的弯曲和节点中韧带的弯曲。为了研究这些新颖的设计，选择了新颖的六韧带 (hexa) 排列，这是一种源自六手性的结构。这是通过使用有限元模拟和 3D 打印样本的机械测试来研究的。结果分析支持存在分层变形系统的建议。发现泊松比的值取决于相应韧带的相对厚度。