Numerical modelling of low-density cellular materials

被引:14
|
作者
Ren, X. James [1 ]
Silberschmidt, Vadim V. [2 ]
机构
[1] Liverpool John Moores Univ, Sch Engn, Liverpool L3 3AF, Merseyside, England
[2] Loughborough Univ Technol, Wolfson Sch Mech & Mfg Engn, Loughborough LE11 3TU, Leics, England
关键词
cellular materials; stress-strain behaviour; representative volume element; damage;
D O I
10.1016/j.commatsci.2007.07.038
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper, the effective stress-strain behaviours of four typical low-density 2D structures are comparatively studied by means of finite element analysis using the representative volume element approach. The relation between the relative density and cell wall thickness-to-length ratio for the structures are determined based on geometry analysis and periodic boundary conditions are employed in models of comparable densities. The dependence of the Young's moduli and the collapse strength on cell parameters have been established and compared with analytical solutions. The effect of defects in the form of broken cell walls on deformational behaviour is studied systematically and correlated to the connectivity of the foam based on percolation analysis. (C) 2007 Elsevier B.V. All rights reserved.
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页码:65 / 74
页数:10
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