Force chains in monodisperse spherical particle assemblies: Three-dimensional measurements using neutrons

被引：15

作者：

Wensrich, C. M. ^{[1
]}

Kisi, E. H. ^{[1
]}

Luzin, V. ^{[2
]}

Garbe, U. ^{[2
]}

Kirstein, O. ^{[1
,3
]}

Smith, A. L. ^{[1
]}

Zhang, J. F. ^{[1
]}

机构：

[1] Univ Newcastle, Callaghan, NSW 2308, Australia

[2] Australian Nucl Sci & Technol Org, Bragg Inst, Kirrawee, NSW 2232, Australia

[3] European Spallat Source, S-22100 Lund, Sweden

来源：

PHYSICAL REVIEW E | 2014年 / 90卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

ELASTIC-MODULI; STRESS-DISTRIBUTION; GRANULAR-MATERIALS; RANDOM PACKING; PARTIAL BURIAL; SHEAR BANDS; FLUCTUATIONS;

D O I：

10.1103/PhysRevE.90.042203

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The full triaxial stress state within individual particles in a monodisperse spherical granular assembly has been measured. This was made possible by neutron imaging and computed tomography combined with neutron diffraction strain measurement techniques and associated stress reconstruction. The assembly in question consists of 549 precision steel ball bearings under an applied axial load of 85 MPa in a cylindrical die. Clear evidence of force chains was observed in terms of both the shape of the probability distribution function for normal stresses and the network formed by highly loaded particles. An extensive analysis of the source and magnitude of uncertainty in these measurements is also presented.

引用

页数：13

共 45 条

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