Numerical Investigation of the Elastic Properties of Binary Mixtures as a Function of the Size Ratio and Fines Content
Publication: International Journal of Geomechanics
Volume 20, Issue 9
Abstract
This paper examines the influences of the size ratio and fines content on Young's modulus and the shear modulus of binary mixtures using the discrete element method. The moduli were gained by numerical simulations of drained triaxial compression tests. The contribution of each contact type is quantified, and the results indicate that the moduli are controlled by the combined action of various contact types. The analysis of microscopic characteristics shows that the moduli rely on the modified void ratio and 2/3 power of the modified volume-weighted coordination number. Additionally, a good relationship among the normalized modulus, the volume-weighted coordination number, and the peak friction angle is found.
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Acknowledgments
The authors are grateful for the financial support given by these projects, including the Fundamental Research Funds for the Central Universities of Central South University (No. 2018zzts195), Beijing Municipal Science and Technology Project: Research and Application of Design and Construction Technology of Railway Engineering Traveling the Rift Valley (No. Z181100003918005), and the National Natural Science Foundation of China (No. 51809292).
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Published In
International Journal of Geomechanics
Volume 20 • Issue 9 • September 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Jun 19, 2019
Accepted: Apr 27, 2020
Published online: Jul 6, 2020
Published in print: Sep 1, 2020
Discussion open until: Dec 6, 2020
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