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	Force distribution in static granular matter in two dimensions
	Sun Qi-Cheng ; Wang Guang-Qian
	2010-10-12 ; 2010-10-12
关键词	Theoretical or Mathematical/ friction granular materials particle size/ force distribution static granular matter particle size multiscale methodology granular matter dynamics discrete element model Hertzian contact law Mindlin-Deresiewicz contact theory sand grains force chain pattern stress distribution friction coefficient/ A4610 Mechanics of discrete systems A4630P Friction, wear, adherence, hardness, mechanical contacts
中文摘要	Granular matter is a large assemblage of individual solids, which is fundamentally different from any other type of matters, such as solid and liquid. The intrinsic nature of granular matter is of multi-scale, inclusive of microscale of particle size, mesoscale of force chain and macroscale of the bulk of granular matter. The mesoscale of force chain bridges single particle and granular matter, and leads to unique properties and behaviours of granular matters, and thus acts as the key issue in the study of granular matter. In this work, we firstly propose a multiscale methodology for granular matter dynamics, and point out that the characteristics of force chain is the key to the granular dynamics. We then propose a discrete element model based on rigorous Hertzian contact law and Mindlin-Deresiewicz contact theory for normal and tangential contact forces, respectively. The static packing of 12000 sand grains under the action of gravity in two dimensions is simultaed, and the force chain pattern and stress distribution are obtained. The force distribution, force chain length distribution and the angle distribution are calculated and analyzed. Friction coefficient of particle is found to be a very sensitive factor affecting properties of granular matter, and thus its influence on the above parameters is studied as well.
语种	中文
出版者	Chinese Physical Society ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/82021]
专题	清华大学
推荐引用方式 GB/T 7714	Sun Qi-Cheng,Wang Guang-Qian. Force distribution in static granular matter in two dimensions[J],2010, 2010.
APA	Sun Qi-Cheng,&Wang Guang-Qian.(2010).Force distribution in static granular matter in two dimensions..
MLA	Sun Qi-Cheng,et al."Force distribution in static granular matter in two dimensions".(2010).

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