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
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
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.
(Treatment of materials and its effects on microstructure, nanostructure, And properties)
引用本文:
WANG Bao-Shan;SHI Xing-Jue;CHEN Yong;GE Hong-Kui;WONG Teng-Fong. Grain Crush and Its Evolution in Granular Material: a Two-Dimensional Distinct Element Model Approach[J]. 中国物理快报, 2004, 21(8): 1651-1654.
WANG Bao-Shan, SHI Xing-Jue, CHEN Yong, GE Hong-Kui, WONG Teng-Fong. Grain Crush and Its Evolution in Granular Material: a Two-Dimensional Distinct Element Model Approach. Chin. Phys. Lett., 2004, 21(8): 1651-1654.
2004, Vol. 21 
