Statistical distribution of forces in stressed 2-D low-density materials with random microstructures

被引：11

作者：

Chan, S. H. ^{[1
]}

Ngan, A. H. W. ^{[1
]}

机构：

[1] Univ Hong Kong, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China

来源：

MECHANICS OF MATERIALS | 2006年 / 38卷 / 12期

关键词：

foam materials; statistical mechanics; entropy; elasticity; random materials;

D O I：

10.1016/j.mechmat.2006.02.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

When a low-density random structure is loaded, the struts inside will not be subject to the same forces because of structural inhomogeneities. The probability distributions of the internal forces in 2-D elastic random structures under axial and shear loadings are investigated in this work using a purposely-built loading setup. The results are compared to the predictions from a statistical-mechanics-based theory in which an entropy functional is used to represent the structural randomness. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1199 / 1212

页数：14

共 27 条

[1]

Ashby M.F., 2000, METAL FOAMS DESIGN G

[2]

Bagi K, 1997, POWDERS & GRAINS 97, P251

[3] Compressive deformation and yielding mechanisms in cellular Al alloys determined using X-ray tomography and surface strain mapping [J].

Bart-Smith, H ;

Bastawros, AF ;

Mumm, DR ;

Evans, AG ;

Sypeck, DJ ;

Wadley, HNG .

ACTA MATERIALIA, 1998, 46 (10) :3583-3592

[4] Statistical distribution of contact forces in packings of deformable spheres [J].

Chan, SH ;

Ngan, AHW .

MECHANICS OF MATERIALS, 2005, 37 (04) :493-506

[5] The influence of aspect ratio of voids on the effective elastic moduli of foamed metals [J].

Chao, LP ;

Huang, JH ;

Huang, YS .

JOURNAL OF COMPOSITE MATERIALS, 1999, 33 (21) :2002-2016

[6] Yield surfaces for hexagonal honeycombs with plateau borders under in-plane biaxial loads [J].

Chaung, CH ;

Huang, JS .

ACTA MECHANICA, 2002, 159 (1-4) :157-172

[7] Effect of imperfections on the yielding of two-dimensional foams [J].

Chen, C ;

Lu, TJ ;

Fleck, NA .

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 1999, 47 (11) :2235-2272

[8] Elastic moduli and plastic collapse strength of hexagonal honeycombs with plateau borders [J].

Chuang, CH ;

Huang, JS .

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 2002, 44 (09) :1827-1844

[9]

Edwards S.F., 1994, GRANUL MATTER, P121

[10]

Evesque P, 2001, POWDERS AND GRAINS 2001, P153

← 1 2 3 →