Boundary stress distribution in silos filled with granular material

To, P., and Sivakugan, N. (2018) Boundary stress distribution in silos filled with granular material. In: Numerical Methods in Geotechnical Engineering (1) pp. 863-868. From: NUMGE 2018: 9th European Conference on Numerical Methods in Geotechnical Engineering, 25-27 June 2018, Porto, Portugal.

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Abstract

Silo, a very popular structure in powder and mining industry, is a vertical container with an open outlet at the bottom and an optional inlet at the top. The design of silo requires a deep understanding of stress distribution at boundaries in both static and dynamic condition. Prior numerical studies use Finite Element Method or Finite Difference Method which shows an increase of vertical stress before it is leveled out by friction at a shallow depth. This is understandable for continuous media because the settlement caused by vertical stress must stop at some level. Nevertheless, experimental studies show that the vertical stress of the granular and porous media still increases with a constant rate even at a much greater depth. Although the Discrete Element Method (DEM) can simulate granular materials, it has some difficulties in determination of stress distribution because it is based on contact force, not the stress. This paper employs DEM with sphero-polyhedra shapes to simulate the behaviour of granular materials in silos. The stress distribution is calculated as average values. This requires a significant number of particles. Therefore, the paper focuses on narrowly graded materials. Some correlation with experimental data has been found.

Item ID: 54409
Item Type: Conference Item (Research - E1)
ISBN: 978-0-429-82319-0
Date Deposited: 04 Jul 2018 23:11
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering @ 70%
09 ENGINEERING > 0914 Resources Engineering and Extractive Metallurgy > 091402 Geomechanics and Resources Geotechnical Engineering @ 20%
01 MATHEMATICAL SCIENCES > 0103 Numerical and Computational Mathematics > 010301 Numerical Analysis @ 10%
SEO Codes: 87 CONSTRUCTION > 8701 Construction Planning > 870101 Civil Construction Planning @ 20%
87 CONSTRUCTION > 8702 Construction Design > 870201 Civil Construction Design @ 80%
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