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Structural Mechanics of cylindrical fish-cell zero Poisson's ratio metamaterials

机译:圆柱形鱼细胞零泊松比超材料的结构力学

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In this paper, a novel cylindrical metamaterial exhibiting zero Poisson's ratio in two different directions is introduced. Detailed CAD modelling of a curved Fish-Cells necessary for numerical and experimental analysis are presented. High-fidelity finite element models are developed to assess the homogenisation studies of Poisson's ratio, Young's modulus and torsion behaviour, demonstrating the curvature effect and independency of the mechanical behaviour of cylindrical Fish-Cells metamaterial from tessellation numbers. Experimental analysis is performed to validate the zero Poisson's ratio, deformation and fracture mechanism discussed in numerical simulations. Moreover, buckling and modal behaviours of the cylindrical Fish-Cells metamaterials are studied and compared with equivalent shell models.
机译:本文介绍了一种在两个不同方向上泊松比为零的新型圆柱形超材料。介绍了数值和实验分析所需的弯曲鱼细胞的详细CAD建模。开发了高保真有限元模型来评估泊松比、杨氏模量和扭转行为的均质化研究,证明了圆柱形鱼细胞超材料的曲率效应和力学行为与镶嵌数的独立性。通过实验分析验证了数值模拟中讨论的零泊松比、变形和断裂机理。此外,还研究了圆柱形鱼细胞超材料的屈曲和模态行为,并与等效壳模型进行了比较。

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