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Numerical investigation on angle of repose and force network from granular pile in variable gravitational environments

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WOS被引频次:22
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成果类型:
期刊论文
作者:
Chen, H.;Liu, Y. L.*;Zhao, X. Q.;Xiao, Y. G.;Liu, Y.
通讯作者:
Liu, Y. L.
作者机构:
[Liu, Y. L.; Xiao, Y. G.; Chen, H.; Zhao, X. Q.] Cent S Univ, State Key Lab High Performance Complex Mfg, Changsha 410083, Hunan, Peoples R China.
[Liu, Y. L.; Chen, H.; Zhao, X. Q.] Cent S Univ, Coll Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China.
[Liu, Y.] Cent S Univ, Sch Architecture & Art, Changsha 410083, Hunan, Peoples R China.
通讯机构:
[Liu, Y. L.] Cent S Univ, Coll Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China.
语种:
英文
关键词:
Granular pile;Angle of repose;Gravity effect;Force network;Discrete element method
期刊:
Powder Technology
ISSN:
0032-5910
年:
2015
卷:
283
页码:
607-617
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:化学;WOS学科类别:Engineering, Chemical
入藏号:
WOS:000361263300063;EI:20152701004285
机构署名:
本校为第一且通讯机构
院系归属:
机电工程学院
建筑与艺术学院
摘要:
This paper presents a numerical investigation on the relationship between the angle of repose and gravity by a three dimensional discrete element method. Taking particle shape, particle size and surface roughness of particle into account, the forming of granular pile was simulated under four different gravitational conditions: the Moon gravity, Martian gravity, Earth gravity and super-gravity. The angle of repose at macro level and the contact forces between particles of the pile were analyzed. Results show that the contact forces are lognormal distributed with about 65% smaller than the mean, and the ratio of tangential to normal force is uniformly distributed except for a small peak where the friction force is fully mobilized. The probability distribution of contact forces normalized by partide's weight under all gravity conditions shows to be in mutual coincidence, and the distribution of the ratio of tangential to normal force is independent of gravity. Although the microstructure of pile varies randomly, the angle of repose will not be affected by the magnitude of gravity. (C) 2015 Elsevier B.V. All rights reserved.
参考文献:
Atwood-Stone C, 2013, GEOPHYS RES LETT, V40, P2929, DOI 10.1002/grl.50586
Blum J, 2010, MICROGRAVITY SCI TEC, V22, P517, DOI 10.1007/s12217-010-9236-3
Chung YC, 2008, PARTICUL SCI TECHNOL, V26, P83, DOI 10.1080/02726350701759381
Chung YC, 2013, POWDER TECHNOL, V237, P53, DOI 10.1016/j.powtec.2012.12.052
Cleary PW, 2008, POWDER TECHNOL, V179, P144, DOI 10.1016/j.powtec.2007.06.018

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