Mechanical properties of carbon fiber composite octet-truss lattice structures

被引：77

作者：

Dong, Liang ^{[1
]}

Wadley, Haydn ^{[1
]}

机构：

[1] Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22903 USA

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2015年 / 119卷

关键词：

Octet-truss lattice; Elastic stiffness; Strength; Carbon fiber composite; COMPRESSIVE RESPONSE; FABRICATION; FAILURE; CFRP;

D O I：

10.1016/j.compscitech.2015.09.022

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Octet-truss lattice structures have been made from balanced [0/90] carbon fiber reinforced polymer (CFRP) laminates using a simple snap-fit method. The lattice structures moduli and strengths have been measured during [001] and [100] directions free compressions as a function of the lattice relative density. Core failure occurred by either (i) Euler buckling ((rho) over bar < 5%) or (ii) delamination dominated failure (<(rho)over bar> > 5%) of the struts. The measurements are shown to be well predicted by micromechanics models of these composite strut failure modes. Snap-fit CFRP octet-truss lattice structures are found to exhibit mechanical properties competitive with other cellular materials and topologies. Their isotropic response may provide new opportunities for ultra-lightweight multiaxial loaded structures. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：26 / 33

页数：8

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