Role of material directionality on the mechanical response of Miura-Ori composite structures
Role of material directionality on the mechanical response of Miura-Ori composite structures
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DOI：
10.1016/j.compstruct.2022.116606
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发表时间：
2022-06
影响因子：
6.3
通讯作者：
Haotian Feng;Guanjin Yan;P. Prabhakar
中科院分区：
文献类型：
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作者：
Haotian Feng;Guanjin Yan;P. Prabhakar
本文旨在了解折纸结构的机械响应的方向性材料属性的作用。我们考虑的三浦Ori结构我们的目标模型，由于其可伸缩性和负泊松比（NPR）的影响，这是广泛应用于减震器，避难所，航空航天应用等传统的三浦Ori结构是由各向同性材料（铝，丙烯酸），其机械性能，如刚度和NPR是很好的理解。然而，这些响应如何受到定向材料（如碳纤维增强聚合物（CFRP）复合材料）的影响，需要更深入的了解。为此，我们研究了CFRP复合材料中的纤维方向和排列以及Miura Ori的几何参数如何控制此类结构的刚度和NPR。通过有限元分析，我们表明，由CFRP复合材料制成的三浦Ori结构可以实现更高的刚度和泊松比值比那些由各向同性材料，如铝。然后通过回归分析，建立了不同几何参数与相应力学响应之间的关系，并进一步利用该关系找出了Miura-Ori结构的最佳形状。我们还表明，剪切模量是一个占主导地位的参数，控制上述的各个复合材料的性能之间的三浦-奥利结构的机械响应。我们证明，我们可以优化的三浦Ori结构，通过找到几何和材料参数，导致组合最硬和最可压缩的结构。我们希望我们的研究是一个起点，设计和优化更复杂的折纸结构与复合材料纳入。
This paper aims to understand the role of directional material properties on the mechanical responses of origami structures. We consider the Miura-Ori structures our target model due to their collapsibility and negative Poisson’s ratio (NPR) effects, which are widely used in shock absorbers, disaster shelters, aerospace applications, etc. Traditional Miura-Ori structures are made of isotropic materials (Aluminum, Acrylic), whose mechanical properties like stiffness and NPR are well understood. However, how these responses are affected by directional materials, like Carbon Fiber Reinforced Polymer (CFRP) composites, needs more in-depth understanding. To that end, we study how fiber directions and arrangements in CFRP composites and Miura-Ori’s geometric parameters control the stiffness and NPR of such structures. Through finite element analysis, we show that Miura-Ori structures made of CFRP composites can achieve higher stiffness and Poisson’s ratio values than those made of an isotropic material like Aluminum. Then through regression analysis, we establish the relationship between different geometric parameters and the corresponding mechanical responses, which is further utilized to discover the Miura-Ori structure’s optimal shape. We also show that the shear modulus is a dominant parameter that controls the mechanical responses mentioned above among the individual composite material properties within the Miura-Ori structure. We demonstrate that we can optimize the Miura-Ori structure by finding geometric and material parameters that result in combined stiffest and most compressible structures. We anticipate our research to be a starting point for designing and optimizing more sophisticated origami structures with composite materials incorporated.