Multi-Stability Property of Magneto-Kresling Truss Structures
Multi-Stability Property of Magneto-Kresling Truss Structures
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DOI：
10.1115/1.4051705
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发表时间：
2021-09
期刊：
影响因子：
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通讯作者：
Xinyan Yang;S. Keten
中科院分区：
文献类型：
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作者：
Xinyan Yang;S. Keten
Kresling桁架结构，来自Kresling折纸，由于其双稳定性和各种其他特性而被广泛研究，这些特性对各种工程应用都很有用。Kresling桁架的稳定状态取决于其几何形状和弹性响应，这涉及到有限的设计空间，在以前的研究中已经进行了很好的探索。在这项工作中，我们提出了一个磁Kresling桁架设计，涉及嵌入节点磁铁的结构，这将导致一个更复杂的能量景观，因此，更大的可调性下的机械变形。我们探索这个能源景观首先沿着零扭矩折叠路径，然后释放的路径上的约束，探索各种结构的几何形状和磁铁强度的完整的两个自由度的行为。我们表明，磁相互作用可以改变势能景观，通过改变稳定的配置，调整能量阱深度，或两者兼而有之。具有不同最小值的能量威尔斯井赋予这种磁弹性结构以出色的能量存储能力。更有趣的是，适当设计的磁克雷斯林桁架系统产生一个三稳态结构，这是不可能的，在没有磁铁。我们还展示了各种加载路径，可以诱导所需的构象变化的结构。所提出的磁-克雷斯林桁架设计为制造可调、可扩展的磁弹性多稳态系统奠定了基础，该系统可以很容易地用于能量收集、存储、振动控制以及具有变形能力的主动结构。
The Kresling truss structure, derived from Kresling origami, has been widely studied for its bi-stability and various other properties that are useful for diverse engineering applications. The stable states of Kresling trusses are governed by their geometry and elastic response, which involves a limited design space that has been well explored in previous studies. In this work, we present a magneto-Kresling truss design that involves embedding nodal magnets in the structure, which results in a more complex energy landscape, and consequently, greater tunability under mechanical deformation. We explore this energy landscape first along the zero-torque folding path and then release the restraint on the path to explore the complete two-degree-of-freedom behavior for various structural geometries and magnet strengths. We show that the magnetic interaction could alter the potential energy landscape by either changing the stable configuration, adjusting the energy well depth, or both. Energy wells with different minima endow this magneto-elastic structure with an outstanding energy storage capacity. More interestingly, proper design of the magneto-Kresling truss system yields a tri-stable structure, which is not possible in the absence of magnets. We also demonstrate various loading paths that can induce desired conformational changes of the structure. The proposed magneto-Kresling truss design sets the stage for fabricating tunable, scalable magneto-elastic multi-stable systems that can be easily utilized for applications in energy harvesting, storage, vibration control, as well as active structures with shape-shifting capability.