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Grain Crush and Its Evolution in Granular Material: a Two-Dimensional Distinct Element Model Approach |
| WANG Bao-Shan1,2;SHI Xing-Jue1;CHEN Yong2;GE Hong-Kui2;WONG Teng-Fong3 |
| 1School of Earth and Space Science, University of Science and Technology of China, Hefei 230026
2Institute of Geophysics, China Earthquake Administration, Beijing 100081
3Department of Geosciences, State University of New York at Stony Brook, Stony Brook NY 11794-2100, USA |
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| Cite this article: |
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WANG Bao-Shan, SHI Xing-Jue, CHEN Yong et al 2004 Chin. Phys. Lett. 21 1651-1654 |
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Abstract A crush criterion and a simplified post-crush process for spherical grains are introduced into the traditional distinct element model (DEM). The crush criterion is based on Hertzian contact, and it indicates a negative relation between critical force Fcr and radius R via Fcr∝R-3/2. Effects of grain crush on deformation pattern and statistical features of crush evolution for samples under uniaxial strain load are intensively investigated. Influences of maximum crush times and particle size distribution (PSD) are also discussed. It is found that: (1) Grain crush will blur the localization of deformation. (2) Crush is prone to occur in larger grains, due to force concentration and lower critical force Fcr for larger grains. (3) Grain crush only temporarily reduces contact force, which results in the most rapid increase of the number of grains with maximum crush time.
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| Keywords:
81.20.Ev
62.20.Fe
81.40.-z
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Published: 01 August 2004
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| PACS: |
81.20.Ev
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(Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation)
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62.20.Fe
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81.40.-z
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(Treatment of materials and its effects on microstructure, nanostructure, And properties)
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