This paper proposes the design and networking method of a metamorphic Ori-block unit and develops a novel family of cellular mechanical metamaterials. First, a novel 6R (Revolute pair) diamond kinematotropic linkage (DKL) with two bifurcation motions is presented and its kinematic model is analyzed using the improved Denavit–Hartenberg parameter method. Additionally, the screw theory is used to analyze its mobility and verify it has not instantaneity in every configuration. This linkage exhibits two bifurcation motions with one rotational degree-of-freedom (DOF). Moreover, a metamorphic Ori-block unit is designed based on the 6R DKL and optimized to assemble a novel metamaterial cell. According to performance analysis, the first motion mode of this metamaterial cell exhibits a negative Poisson's ratio performance, while the second motion mode involves a large deployed/folded ratio. Based on this metamaterial cell, two methods are proposed for networking cellular metamaterials. On the basis of preserving the kinematic characteristics and performance of the metamaterial cell, an optimized design is conducted, and subsequently the optimized metamaterial cells are assembled into novel cellular metamaterials. This study provides a novel concept for the design and movable network of deployable and programmable cellular metamaterials.

中文翻译：

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具有分叉运动的基于运动联动的细胞超材料：构建和分析


本文提出了变质 Ori-block 单元的设计和网络方法，并开发了一种新型的细胞机械超材料。首先，提出了一种具有两个分叉运动的新型 6R（旋转对）金刚石运动连杆机构（DKL），并使用改进的 Denavit-Hartenberg 参数方法分析了其运动学模型。此外，还利用螺旋理论分析了其流动性，并验证了其并非在每种配置下都具有瞬时性。该连杆机构表现出具有一个旋转自由度 (DOF) 的两个分叉运动。此外，基于6R DKL设计了变质Ori-block单元，并对其进行了优化以组装新型超材料单元。根据性能分析，该超材料单元的第一运动模式表现出负泊松比性能，而第二运动模式涉及大的展开/折叠比。基于这种超材料单元，提出了两种用于网络单元超材料的方法。在保留超材料单元运动学特性和性能的基础上，进行优化设计，随后将优化后的超材料单元组装成新型蜂窝超材料。这项研究为可部署和可编程蜂窝超材料的设计和可移动网络提供了一个新颖的概念。