Experimental Study on the Densification of two-dimensional Vibrated Equal Spheres

AN Xizhong; LI Changxing; YANG Runyu; YU Aibing

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Experimental Study on the Densification of two-dimensional Vibrated Equal Spheres

AN Xizhong 1 * #,LI Changxing 1,YANG Runyu 2,YU Aibing 2

1.School of Materials and Metallurgy, Northeastern University

2.Laboratory for Simulation and Modelling of Particulate System, School of Materials Science and Engineering, University of New South Wales

*Correspondence author

#Submitted by

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Funding: 教育部博士点新教师基金（No.20070145036）

Opened online:14 February 2011

Accepted by: none

Citation: AN Xizhong,LI Changxing,YANG Runyu.Experimental Study on the Densification of two-dimensional Vibrated Equal Spheres[OL]. [14 February 2011] http://en.paper.edu.cn/en_releasepaper/content/4408567

Densification of mono-sized sphere packings under two-dimensional (2D) vibration is experimentally studied. The effects of operation conditions, such as vibration amplitude and frequency, feeding method, vibration mode and container size on packing density are systematically analyzed. The results indicate that much denser packings than random close packing can be achieved by proper control of both vibration amplitude and frequency. Feeding method also plays an important role in densification. Higher packing density can be obtained when the number of particles fed per batch NB is less than or equal to one layer when in interval vibration mode. Packing density decreases with the increase of NB and keeps constant when NB is more than three layers per batch. However, even this, the packing density is also much higher than that in total feeding with corresponding to continuous vibration, which indicates that the interval vibration is more effective than continuous vibration to realize the very dense packing. Through the extrapolation on packing density obtained from different sized containers, the maximum packing density is 0.6757 for the total feeding method and 0.7131 for the batch-wise feeding. Partially ordered structures are observed in the final packings.

Keywords:particle packing; densification; 2D vibration; batch-wise feeding

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