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Storage and Flow of Solids

01 Jan 1964-
About: The article was published on 1964-01-01 and is currently open access. It has received 585 citations till now. The article focuses on the topics: Flow (mathematics).
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Journal ArticleDOI
TL;DR: In this paper, the influence of the loading mechanism on the results of the original Jenike-type tester and a slightly modified one are considered and the deviations in the primary results and derived data are quantified by introducing correction factors, the boundary values of which could be calculated.

3 citations

01 Jan 2002
TL;DR: In this article, the strength characteristics of fine milk, agglomerated milk and potato starch were examined using the Jenike shear tester according to Euro- code 1 recommendations.
Abstract: Thestrength characteristics of fine milk, agglomerated milk and potato starch were examined. Experiments were performed using the Jenike shear tester according to Euro- code 1 recommendations. The tester was 60 mm in diameter and the displacement velocity was 0.03 mm s -1 .A reference normal stress ranging from 30 to 240 kPa was applied. Experiments revealed a significant effect caused by shear stress vibration re- sulting from dilatation and hardening of the material during the slow shearing phase of these tests. The frequency of these vibra- tions were found to decrease with an increase in normal stress. Two components of the total strength were suggested: the physical friction strength and the extra component of strength caused by dilatation.

2 citations

Book ChapterDOI
31 Dec 2001
TL;DR: In this paper, the authors consider a storage tank with a bin and a converging part, where the bin is composed of a vertical part and a horizontal part, called a hopper.
Abstract: Bulk solids behave neither like liquids nor like solids. A liquid at rest has a horizontal surface and cannot transmit any shear force. In a storage tank pressure increases linearly with depth and does not depend on the direction. Bulk solids, however, can form surfaces up to inclinations corresponding to the angle of repose. They are able to transmit static shear forces and the pressures on wall and bottom do not increase linearly with depth. A bulk solid cannot be regarded as a solid either, because it is not able to carry a significant one-dimensional load without lateral support. A silo usually consists of a vertical part, called bin, and a converging part, called hopper. In the hopper part the vertical pressure is decreasing, because in addition to the friction force between bulk solid and wall the vertical component of the stress normal to the wall carries an additional part of the weight of the bulk solid. During filling the major principal stress—because of the action of gravity—is directed vertically in the axis of symmetry and the minor one horizontally. If bulk solid is discharged through the bottom opening, the material in the hopper is compressed horizontally—because of the converging action—while it expands vertically because of the open outlet. Now the horizontal stress becomes the major principal stress while the vertical is the minor one.

2 citations