scholarly journals Discrete Element Modeling of the Effects of Cutting Parameters and Rock Properties on Rock Fragmentation

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 136393-136408
Author(s):  
Jiuqun Zou ◽  
Weihao Yang ◽  
Jihuan Han
Keyword(s):  
Cutting Parameters ◽  
Discrete Element ◽  
Rock Fragmentation ◽  
Rock Properties ◽  
Discrete Element Modeling ◽  
Element Modeling

scholarly journals An Energy-Based Discrete Element Modeling Method Coupled with Time-Series Analysis for Investigating Deformations and Failures of Jointed Rock Slopes

2021 ◽  
Vol 11 (12) ◽  
pp. 5447
Author(s):  
Xiaona Zhang ◽  
Gang Mei ◽  
Ning Xi ◽  
Ziyang Liu ◽  
Ruoshen Lin
Keyword(s):  
Time Series ◽  
Iterative Process ◽  
Discrete Element ◽  
Jointed Rock ◽  
Modeling Method ◽  
Discrete Element Modeling ◽  
Rock Slopes ◽  
Sliding Surface ◽  
Element Modeling ◽  
Displacement Based

The discrete element method (DEM) can be effectively used in investigations of the deformations and failures of jointed rock slopes. However, when to appropriately terminate the DEM iterative process is not clear. Recently, a displacement-based discrete element modeling method for jointed rock slopes was proposed to determine when the DEM iterative process is terminated, and it considers displacements that come from rock blocks located near the potential sliding surface that needs to be determined before the DEM modeling. In this paper, an energy-based discrete element modeling method combined with time-series analysis is proposed to investigate the deformations and failures of jointed rock slopes. The proposed method defines an energy-based criterion to determine when to terminate the DEM iterative process in analyzing the deformations and failures of jointed rock slopes. The novelty of the proposed energy-based method is that, it is more applicable than the displacement-based method because it does not need to determine the position of the potential sliding surface before DEM modeling. The proposed energy-based method is a generalized form of the displacement-based discrete element modeling method, and the proposed method considers not only the displacement of each block but also the weight of each block. Moreover, the computational cost of the proposed method is approximately the same as that of the displacement-based discrete element modeling method. To validate that the proposed energy-based method is effective, the proposed method is used to analyze a simple jointed rock slope; the result is compared to that achieved by using the displacement-based method, and the comparative results are basically consistent. The proposed energy-based method can be commonly used to analyze the deformations and failures of general rock slopes where it is difficult to determine the obvious potential sliding surface.

Large-scale discrete element modeling in a fluidized bed

2010 ◽  
Vol 64 (10-12) ◽  
pp. 1319-1335 ◽  
Author(s):  
Mikio Sakai ◽  
Yoshinori Yamada ◽  
Yusuke Shigeto ◽  
Kazuya Shibata ◽  
Vanessa M. Kawasaki ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Large Scale ◽  
Discrete Element ◽  
Discrete Element Modeling ◽  
Element Modeling

Discrete element modeling of deformable pinewood chips in cyclic loading test

2019 ◽  
Vol 345 ◽  
pp. 1-14 ◽  
Author(s):  
Yidong Xia ◽  
Zhengshou Lai ◽  
Tyler Westover ◽  
Jordan Klinger ◽  
Hai Huang ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Discrete Element ◽  
Discrete Element Modeling ◽  
Loading Test ◽  
Cyclic Loading Test ◽  
Element Modeling
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