The role of particle shape on the stress distribution in a sandpile by I Zuriguel, and T Mullin...
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Transcript of The role of particle shape on the stress distribution in a sandpile by I Zuriguel, and T Mullin...
The role of particle shape on the stress distribution in a sandpile
by I Zuriguel, and T Mullin
Proceedings AVolume 464(2089):99-116
January 8, 2008
©2008 by The Royal Society
Sketch of the experimental set-up.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
Image of the particles as they are arranged within the pile.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
Example of piles of (a) discs and (b) elliptic cylinders viewed through the two cross polarizers.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
Monotonic increase of | I|2 when different vertical stress is applied to a thin layer of discs. ∇
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
(a) Close-up image of the chains that build up the stress network.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
Vertical stress distributions estimated from averaging the results of 500 repetitions of piles built from a localized region with a mixture of 2500 discs with diameter 6.9±0.1 mm and 500 discs with
diameter 8.9±0.1 mm.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
Difference between the vertical stress profiles measured experimentally and the Gaussian fits for (a) discs, (b) elliptic cylinders and (c) pear-shaped cylinders when they are poured from a
localized region at 57 cm.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
Semilogarithmic plot of the chain length distribution for the mixture of elliptic cylinders.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
(a) Typical vertical slices used in processing chain orientation.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
Probability distributions for the chain orientations calculated from 500 piles in a 1.5 cm slice located at d=3.0 cm from the centre of the pile: (a) discs, (b) elliptic cylinders and (c) pear-shaped
cylinders.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
Mean chain orientation for different positions along the x-direction of the pile.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
Orientation of the elliptic cylinders in the pile.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society
Orientation of the pear-shaped cylinders in the pile.
I Zuriguel, and T Mullin Proc. R. Soc. A 2008;464:99-116
©2008 by The Royal Society