Internal Deformation Measurement and Force Chain Characterization of Mason Sand under Confined Compression using Incremental Digital Volume Correlation

被引：38

作者：

Hu, Zhenxing ^{[1
]}

Du, Yingjie ^{[1
]}

Luo, Huiyang ^{[1
]}

Zhong, Bin ^{[2
]}

Lu, Hongbing ^{[1
]}

机构：

[1] Univ Texas Dallas, Dept Mech Engn, Richardson, TX 75080 USA

[2] Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China

来源：

EXPERIMENTAL MECHANICS | 2014年 / 54卷 / 09期

基金：

美国国家科学基金会;

关键词：

Incremental digital volume correlation; Granular material; Mason sand; Force chain; Three-dimensional deformation; RAY COMPUTED-TOMOGRAPHY; IMAGE CORRELATION; VOID RATIO; MICROTOMOGRAPHY IMAGES; STRAIN LOCALIZATION; GRANULAR-MATERIALS; SHEAR BANDS; EGLIN SAND; MU-CT; NANOINDENTATION;

D O I：

10.1007/s11340-014-9915-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanical behavior of granular materials such as sand is not well understood due to its complex solid/fluid-like behavior. In this paper, Mason sand was investigated to determine the grain-level Young's modulus and hardness by nanoindentation, and the mesoscale behavior through X-ray tomography of a sample in compression. Mason sand specimen was confined in a polycarbonate tube and compressed in the axial direction at ten axial compressive strains up to -21.8 % while its microstructures were observed. The mesoscale deformations were determined by incremental digital volume correlation of reconstructed volumetric images. A procedure for characterization of internal force chains is developed. The minor principal strains and their principal directions were obtained and used to determine the formation and evolution of force chains.

引用

页码：1575 / 1586

页数：12

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