通过沿折痕耦合厚 Miura-ori 管实现刚性可展开结构
Stiff deployable structures via coupling of thick Miura-ori tubes along creases
AI总结：
针对厚折纸管耦合中的厚度适配难题，提出沿折痕耦合厚 Miura-ori 管的方法，保持单自由度运动并提高刚度，米级样机验证了其有效性。
摘要：
基于折纸的结构通过折叠产生可编程变形，在实现可展开机构和独特力学性能方面发挥着重要作用。在基于折纸的结构中，通过耦合折纸管进行镶嵌，丰富了几何形状和力学性能的变化。然而，在涉及厚折纸管耦合的工程应用中，厚度适配是一个关键问题。为解决这一问题，本研究提出沿折痕耦合厚 Miura-ori 管，以便于制造；由于耦合界面周围具有局部镜像对称性，该方法保持了厚 Miura-ori 管的单自由度（DOF）运动。此外，该耦合方法有助于提升耦合 Miura-ori 管的高刚度，杆-铰链模型所得单自由度模态与弹性模态之间特征值的巨大差距证明了这一点。最后，研究制造了米级耦合 Miura-ori 管，以展示其单自由度运动和高刚度。本研究结果使结构能够通过单自由度运动快速构建，并通过平面可折叠性增强运输性。
英文摘要：
Origami-based structures play an important role in the realization of deployable mechanisms and unique mechanical properties via programmable deformation by folding. Among origami-based structures, tessellation by the coupling of origami tubes enriches the variations in geometry and mechanical properties. However, thickness accommodation is a critical problem in engineering applications involving the coupling of thick origami tubes. To solve this problem, this study proposes the coupling of thick Miura-ori tubes along the creases for facile fabrication, which sustains the one-degree-of-freedom (DOF) motion of thick Miura-ori tubes owing to the local mirror symmetry around the coupling interfaces. Furthermore, the coupling method contributes to the high stiffness of the coupled Miura-ori tubes, as evidenced by the wide gap in the eigenvalues between the one-DOF mode and the elastic modes obtained by the bar-and-hinge models. Finally, meter-scale coupled Miura-ori tubes were fabricated to demonstrate one-DOF motion and high stiffness. The findings of this study enable the rapid construction of structures by one-DOF motion and enhancement of transportability via flat-foldability.
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