An effective length model for octet lattice

被引：43

作者：

Chen, X. Y. ^{[1
]}

Tan, H. F. ^{[1
]}

机构：

[1] Harbin Inst Technol, Ctr Composite Mat, Harbin 150001, Heilongjiang, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 2018年 / 140卷

基金：

中国国家自然科学基金;

关键词：

Octet lattice material; Additive manufacturing; Finite element analysis; Elastic modulus; Yield strength; HOMOGENIZATION METHODS; CELLULAR STRUCTURES; PERIODIC LATTICES; TRUSS MATERIALS; DEFORMATION; STRENGTH; METAMATERIALS; FABRICATION; COMPOSITES; ULTRALIGHT;

D O I：

10.1016/j.ijmecsci.2018.03.016

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

As technology advance in 3D printing, octet lattice materials can be made with a wide range of strut aspect ratios. It is essential to develop a satisfying theoretical model for large aspect ratio ranges. In this paper, an analytical model considering material overlapping effect in strut joint, bend and shear has been derived to predict the effect compressive stiffness and strength of the octet lattice materials with cylindrical struts. The models have been validated by FE simulations and experiments. These results demonstrate that the relative compressive stiffness and strength not only depend on the relative density, but also relate to the effect of strut joint, bend and shear. The material overlapping effect in strut joint and the coupling effect between the shearing force and the bending moment will raise the relative compressive stiffness and strength. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：279 / 287

页数：9

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