Effect of Particle Shape on Repose Angle Based on Hopper Flow Test and Discrete Element Method
Effect of Particle Shape on Repose Angle Based on Hopper Flow Test and Discrete Element Method
复制标题
基于料斗流动试验和离散元法的颗粒形状对休止角的影响
DOI：
10.1155/2020/8811063
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发表时间：
2020-08
影响因子：
1.8
通讯作者：
Ferellec Jean-Francois
中科院分区：
文献类型：
--
作者：
Fu Jian-Jun;Chen Cheng;Ferellec Jean-Francois
散粒体的休止角是了解散粒体的微观行为并将其与宏观行为联系起来的一个重要参数。本研究利用自行设计的大型漏斗流试验装置，采用固定漏斗法测量道碴的休止角。然后，使用真实的团块的数值模拟与实验测试进行比较，以证明其有效性。同时，选择具有自定义形状参数的理想化团块，包括颗粒和地面的粗糙度、棱角度、纵横比和球形度，以分析颗粒形状对休止角的影响。结果表明，随着颗粒摩擦系数和地面粗糙度的增大，休止角一般呈增大趋势。随着倾斜度从0增加到4，堆高和休止角增加。同时，延伸区域相应地减小。对于长方体颗粒，随着长径比从1.0增加到1.67，休止角先增加，然后在长径比1.25-1.67之间保持恒定。对于椭球体颗粒，休止角减小，然后在纵横比约1.3时达到最小值，最后增大。
The repose angle of granular material is an essential parameter to understand the microbehavior of the granular material and, then, to relate it with the macrobehavior. In this study, a self-design large-scale hopper flow test apparatus has been developed to measure the repose angle of the ballast using a fixed funnel method. Then, the numerical simulation using the realistic clump is compared with the experimental test to prove its validity. Meanwhile, the idealized clumps with custom shape parameters, including roughness of particle and ground, angularity, aspect ratio, and sphericity, were chosen to analyze the influences of particle shape on the repose angle. The results show that the angle of repose generally tends to increase with the increase of the friction coefficient of particles and the roughness of the ground. With the increase of the angularity from 0 to 4, the pile height and the repose angle increase. Meanwhile, the extended area decreases accordingly. For cuboid particles, with aspect ratio increasing from 1.0 to 1.67, the angle of repose increases firstly and then maintains a constant between aspect ratio 1.25–1.67. For ellipsoid particles, the angle of repose decreases, then reaches a minimum at aspect ratio around 1.3, and finally increases.
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影响因子：
3.7
作者：
K. Miura;K. Maeda;S. Toki
通讯作者：
K. Miura;K. Maeda;S. Toki
DOI：
--
发表时间：
2013-07
期刊：
22017 IEEE International Conference on Computational Science and Engineering (CSE) and IEEE International Conference on Embedded and Ubiquitous Computing (EUC)
影响因子：
--
作者：
Cheng Chen
通讯作者：
Cheng Chen
影响因子：
56.9
作者：
Donev, A;Cisse, I;Chaikin, PM
通讯作者：
Chaikin, PM
影响因子：
3.5
作者：
BARRETT, PJ
通讯作者：
BARRETT, PJ
影响因子：
--
作者：
W. Busscher
通讯作者：
W. Busscher