形态折纸图案的运动学及其混合状态

Phanisri P. Pratapa, Ke Liu, G. Paulino
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引用次数: 0

摘要

最近,Pratapa, Liu, Paulino, Phy。Rev. Lett. 2019),它展示了有趣的特性,例如泊松比从负无穷到正无穷的极端可调性,以及通过刚性折纸运动学转换为混合状态的能力。我们观察Morph单元格的几何形状,它可以存在于四度顶点的山/谷分配不同的两种特征模式中,然后将单元格组装成复杂的镶嵌,这些镶嵌是可相互转换的,并表现出对比的特性。我们提出了可选的和详细的描述来(i)理解Morph模式如何在其所有构型状态下顺利转换,(ii)用不同混合状态集的区分路径来表征Morph模式的构型空间,(iii)推导了泊松比切换的条件,并解释了由于局部和全局运动学相互作用而受到平面内变形时Morph模式中的锁模现象。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Kinematics of the Morph Origami Pattern and its Hybrid States
A new degree-four vertex origami, called the Morph pattern, has been recently proposed by the authors (Pratapa, Liu, Paulino, Phy. Rev. Lett. 2019), which exhibits interesting properties such as extreme tunability of Poisson’s ratio from negative infinity to positive infinity, and an ability to transform into hybrid states through rigid origami kinematics. We look at the geometry of the Morph unit cell that can exist in two characteristic modes differing in the mountain/valley assignment of the degree-four vertex and then assemble the unit cells to form complex tessellations that are inter-transformable and exhibit contrasting properties. We present alternative and detailed descriptions to (i) understand how the Morph pattern can smoothly transform across all its configuration states, (ii) characterize the configuration space of the Morph pattern with distinguishing paths for different sets of hybrid states, and (iii) derive the condition for Poisson’s ratio switching and explain the mode-locking phenomenon in the Morph pattern when subjected to in-plane deformation as a result of the inter-play between local and global kinematics.
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