ON THE EFFECTIVE PROPERTIES OF 3D METAMATERIALS

被引：0
|
作者：
Abdelhamid, Mohamed [1 ]
Czekanski, Aleksander [1 ]
机构：
[1] York Univ, Toronto, ON, Canada
来源：
PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, 2016, VOL. 9 | 2017年
关键词：
Metamaterials; Lattice structures; Size Effect; Octet truss; Stiffness tensor; Surface elasticity; FABRICATION; ULTRALIGHT; LATTICE; DESIGN;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A continuum-based model is developed for the octet-truss unit cell in order to describe the effective mechanical properties (elastic modulus) of the lattice structure. This model is to include different geometric parameters that impact the structural effects; these parameters are: lattice angle, loading direction, thickness to diameter ratio, diameter to length ratio, and ellipticity. All these geometric parameters are included in the stiffness matrix, and the impact of each parameter on the stiffness tensor is investigated. Specifically, the effect of the lattice angle on the elastic moduli is discussed, and the loading direction of the highest elastic modulus is investigated for different lattice angles. Furthermore, the Gurtin-Murdoch model of surface elasticity is used to include the size effect in the stiffness tensor, as well as anisotropy of this model is investigated.
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页数：8
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