Estimation of the mechanical properties of lightweight lattice structures subjected to compressive loading (3rd report, effects of the constrained condition along the edges on the mechanical properties of lattice structure)

被引：0

作者：

Ushijima K. ^{[1
,2
]}

Chen D.-H.

Cantwell W.J.

机构：

[1] Department of Mechanical Engineering, Faculty of Engineering, Kyushu Sangyo University, Higashi-ku, Fukuoka, 813-8503

[2] Department of Engineering, University of Liverpool, Liverpool, L69 3GH, (Brownlow Hill

来源：

Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A | 2010年 / 76卷 / 767期

关键词：

Finite element method; Lattice; Plasticity; Structural analysis;

D O I：

10.1299/kikaia.76.860

中图分类号：

学科分类号：

摘要：

In this paper, effects of the constrained condition along the edges on the mechanical properties (initial stiffness E* and plastic collapse strength σ*pl,) of lattice structures are discussed based on theoretical and numerical stress analysis, FEM. The mechanical properties strongly depend on the number of unit cell in three directions x, y, z, and if the number along the loading direction Nz=1, the deformed pattern occurred in a lattice structure can be classified into three types, and the mechanical properties can be estimated by using theoretical results of E* and σ"*pl for each types with a good accuracy. Moreover, the structure having the same number of unit cell in x and y direction (Nx=Ny) shows the higher mechanical properties than any other cases of lattice structures with Nx ≠ Ny.

引用

页码：860 / 867

页数：7

共 4 条

[1]

Gibson L.J., Ashby M.F., Cellular Solids: Structure and Properties, pp. 15-51, (1999)

[2]

Ushijima K., Cantwell W.J., Chen D.-H., Evaluation of the mechanical properties of lightweight lattice structures subjected to compressive loading, 1st report. Analytical approach for the initial stiffness and plastic collapse strength, Transactions of the Japan Society of Mechanical Engineers, Series A, 75, 753, pp. 572-579, (2009)

[3]

Ushijima K., Cantwell W.J., Chen D.-H., Evaluation of the mechanical properties of lightweight lattice structures subjected to compressive loading, 2nd report, Effects of the loading direction and the existence of partially-complete cells on the mechanical properties of lattice structure, Transactions of the Japan Society of Mechanical Engineers, Series A, 75, 759, pp. 1492-1499, (2009)

[4]

Xie L.S., Chan K.C., The effect of strut geometry on the yielding behaviour of open-cell foams, International Journal of Mechanical Sciences, 48, pp. 249-255, (2006)

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