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Numerical Analysis on Static Mechanical Properties of the Periodic Multilayer Lattice Material

机译:周期性多层晶格材料静态力学性能的数值分析

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摘要

Lattice material is a typical periodic structural material, and the gaps of the lattice material are often used to carry filling materials. In order to satisfy the load-carrying requirements of a certain multifunction/structure integrated composite material, four different 3D periodic multilayer lattice materials were proposed in this paper, such as the square, the quadrate, the tetrahedron and the hexagon. The BEAM189 element in ANSYS was adopted to predict their static mechanical properties, and the Mises strength criterion was taken as the failure criterion. Based on the solution of FEM, the axial stress and displacement of the top surface were obtained. The results indicated that adopting the relative stiffness and the load-mass ratio as the overall assessment is effective to evaluate the overall bearing capacity of the multilayer lattice materials. Given the same cross-section size of the cellular configuration, the hexagon multilayer lattice material shows the relatively optimal overall bearing capacity in the four configurations, while the tetrahedron configuration performs the worst.
机译:晶格材料是典型的周期性结构材料,并且晶格材料的间隙通常用于承载填充材料。为了满足某种多功能/结构集成复合材料的承载要求,本文提出了四种不同的3D周期性多层格子材料,分别是正方形,正方形,四面体和六边形。采用ANSYS中的BEAM189单元预测其静态力学性能,并以米塞斯强度准则作为破坏准则。基于有限元解,获得了顶面的轴向应力和位移。结果表明,采用相对刚度和载荷质量比作为整体评估方法可以有效地评价多层格子材料的整体承载力。给定蜂窝状结构的相同横截面尺寸,六边形多层晶格材料在四种结构中显示出相对最佳的整体承载能力,而四面体结构表现最差。

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