Li Mengyue, Peng Rui, Ma Jiayao, Chen Yan
School of Mechanical Engineering, Tianjin University, 135 Yaguan Road, Tianjin 300350, People's Republic of China.
Department of Mechanical Engineering, National University of Singapore, Singapore.
Philos Trans A Math Phys Eng Sci. 2024 Oct 7;382(2283):20240004. doi: 10.1098/rsta.2024.0004.
Origami metamaterials have gained significant attention in recent years, with extensive analysis conducted on their mechanical properties. Previous studies have primarily focused on the effects of design angles, panel side lengths, folding angles or other geometric and material parameters. However, mountain-valley crease assignments of origami patterns, which significantly effect both the geometric and mechanical properties, have yet to be studied in depth. In this article, we create a series of double-corrugated metamaterials with diverse mountain-valley assignments and analyse their Poisson's ratios and mechanical properties under compression loading. The findings of our study demonstrate that varying the mountain-valley assignments allows for the construction of metamaterials with consistent or distinct Poisson's ratios. These assignments have the capability to program the magnitude and to vary the rate of the folding angles. Furthermore, the mechanical properties of the corresponding metamaterials, in particular the specific energy absorption (SEA) and normalized stiffness, exhibit positive correlations with the respective folding angles. Our study highlights the significance of varying mountain-valley assignments as a promising approach for designing origami metamaterials and programming their mechanical properties.This article is part of the theme issue 'Origami/Kirigami-inspired structures: from fundamentals to applications'.
近年来，折纸超材料受到了广泛关注，人们对其力学性能进行了大量分析。以往的研究主要集中在设计角度、面板边长、折叠角度或其他几何和材料参数的影响上。然而，折纸图案的山-谷折痕分配对几何和力学性能都有显著影响，尚未得到深入研究。在本文中，我们创建了一系列具有不同山-谷分配的双波纹超材料，并分析了它们在压缩载荷下的泊松比和力学性能。我们的研究结果表明，改变山-谷分配可以构建具有一致或不同泊松比的超材料。这些分配能够设定折叠角度的大小并改变其变化率。此外，相应超材料的力学性能，特别是比能量吸收（SEA）和归一化刚度，与各自的折叠角度呈正相关。我们的研究强调了改变山-谷分配作为设计折纸超材料和调控其力学性能的一种有前景方法的重要性。本文是主题为“受折纸/剪纸启发的结构：从基础到应用”的一部分。
