Characterization of Elastic Modulus of Granular Materials in a New Designed Uniaxial Oedometric System

A simple uniaxial oedometric system is developed to test the elastic modulus of granular materials. The stress- strain relationship is first measured under conditions of uniaxial compression with additional lateral stress and strain, then the elastic modulus of the material is determined by the line...

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Bibliographic Details
Published inChinese physics letters Vol. 33; no. 3; pp. 118 - 122
Main Author 马沁巍 Yahya Sandali 张瑞楠 马方园 王洪涛 马少鹏 史庆藩
Format Journal Article
LanguageEnglish
Published 01.03.2016
Subjects
单轴
压缩条件
压缩系统
应力-应变关系
弹性模量
表征
设计
颗粒材料
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ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/33/3/038101

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Summary:A simple uniaxial oedometric system is developed to test the elastic modulus of granular materials. The stress- strain relationship is first measured under conditions of uniaxial compression with additional lateral stress and strain, then the elastic modulus of the material is determined by the linear fitting method. It is found that the modulus is positively correlated to the grain size and negatively correlated to the container size. Arching and dragging are revealed to be the mechanism of such correlations by using the digital image correlation method and the pressure film technology based on the statistical method.
Bibliography:A simple uniaxial oedometric system is developed to test the elastic modulus of granular materials. The stress- strain relationship is first measured under conditions of uniaxial compression with additional lateral stress and strain, then the elastic modulus of the material is determined by the linear fitting method. It is found that the modulus is positively correlated to the grain size and negatively correlated to the container size. Arching and dragging are revealed to be the mechanism of such correlations by using the digital image correlation method and the pressure film technology based on the statistical method.
11-1959/O4
Qin-Wei Ma, Yahya Sandali, Rui-Nan Zhang, Fang-Yuan Ma, Hong-Tao Wang, Shao-Peng Ma, Qing-Fan Shi （1.School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081; 2.School of Physics, Beijing Institute of Technology, Beijing 100081; 3.Capital Spaceflight Machinery Company, Beijing 100081; 4.Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084）
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/33/3/038101