請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/43109
標題: Numerical simulation of gravel deposits using multi-circle granule model
作者: Chang, Y.L.
褚炳麟
Chu, B.L.
Lin, S.S.
關鍵字: multi-circle granule model
gravel deposits
distinct element method
angle of repose
trap door test
packing generation scheme
planar elliptic particles
assemblies
media
shape
期刊/報告no:: Journal of the Chinese Institute of Engineers, Volume 26, Issue 5, Page(s) 681-694.
摘要: This study proposes a new Multi-Circle Granule Model (MCGM), based on overlapping circles with various diameters to create an irregular particle shape, to simulate the geometry-dependent behavior of gravel particles for two-dimensional mechanical analyses of gravel deposits. The MCGM model is implemented in a Distinct Element Method (DEM) program for numerical simulation. Two numerical examples are presented to study the effects of gravel shapes on the angles of repose in free falling tests, and on the stability of gravel tunnel excavation in trap door tests. Additionally, the numerical study reveals that the shapes of gravel significantly affect the angle of repose. Furthermore, interlocking, anisotropy, and contact numbers among the Gravels are found to be key factors governing the stability of gravel tunnel excavation. These numerical simulation results of geometry-dependent behavior are quite encouraging for the MCGM model.
URI: http://hdl.handle.net/11455/43109
ISSN: 0253-3839
文章連結: http://dx.doi.org/10.1080/02533839.2003.9670821
顯示於類別:土木工程學系所

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