| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Characterization of Elastic Modulus of Granular Materials in a New Designed Uniaxial Oedometric System |
| Qin-Wei Ma1†, Yahya Sandali2†, Rui-Nan Zhang1, Fang-Yuan Ma3, Hong-Tao Wang4, Shao-Peng Ma1**, Qing-Fan Shi2** |
1School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081
2School of Physics, Beijing Institute of Technology, Beijing 100081
3Capital Spaceflight Machinery Company, Beijing 100081
4Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084
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| Cite this article: |
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Qin-Wei Ma, Yahya Sandali, Rui-Nan Zhang et al 2016 Chin. Phys. Lett. 33 038101 |
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Abstract 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.
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Received: 13 November 2015
Published: 31 March 2016
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| PACS: |
81.05.Rm
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(Porous materials; granular materials)
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62.20.de
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(Elastic moduli)
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07.10.Pz
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(Instruments for strain, force, and torque)
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