Effect of inclusions and holes on the stiffness and strength of honeycombs

被引：67

作者：

Chen, C ^{[1
]}

Lu, TJ ^{[1
]}

Fleck, NA ^{[1
]}

机构：

[1] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England

来源：

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 2001年 / 43卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

honeycombs; imperfections; FEM; Hashin-Shtrikman bounds; self-consistant method;

D O I：

10.1016/S0020-7403(99)00122-8

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A finite element study has been performed on the effects of holes and rigid inclusions on the elastic modulus and yield strength of regular honeycombs under biaxial loading. The focus is on honeycombs that have already been weakened by a small degree of geometrical imperfection, such as a random distribution of fractured cell walls, as these imperfect honeycombs resemble commercially available metallic foams. Hashin-Shtrikman lower and upper bounds and self-consistent estimates of elastic moduli are derived to provide reference solutions to the finite element calculations. It is found that the strength of an imperfect honeycomb is relatively insensitive to the presence of holes and inclusions, consistent with recent experimental observations on commercial aluminium alloy foams. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：487 / 504

页数：18

共 19 条

[1] SIZE EFFECTS DUE TO COSSERAT ELASTICITY AND SURFACE DAMAGE IN CLOSED-CELL POLYMETHACRYLIMIDE FOAM [J].