Influence of specific weight and wall friction coefficient on normal pressures in silos using the Finite Element Method

Gandia, Rômulo Marçal; Gomes, Francisco Carlos; Paula, Wisner Coimbra de; Rodrí­guez, Pilar Rodriguez

doi:10.13083/reveng.v29i1.12336

Cited by 2 publications

(2 citation statements)

References 31 publications

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“…As mentioned above, the hopper angle and the wall friction coefficient are the two most influential parameters [10][11][12]. However, the relations between flow, pressure and the vertical stresses at the cylinder-to-hopper transition are still poorly understood [7,[13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Hopper Angle of a Silo on the Vertical Stress at the Cylinder-to-Hopper Transition

et al. 2022

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Silos are used worldwide to store granular and powdered materials. Agricultural, food and feed products are commonly stored in silos. However, many questions remain unanswered about how to estimate the pressures applied by the bulk material, which are needed to design and calculate the structure of the silo. The complexity of the laws that govern the mechanical behavior of the stored material along with the low number of experimental stations in the world hinder progress in this field. The aim of this study was to elucidate the relationship of the hopper angle, flow pattern and vertical stress at the cylinder-to-hopper transition in slender silos. Therefore, a set of experiments was conducted on a test station to measure the vertical stress produced by maize at the cylinder-to-hopper transition. Five different hopper angles were used. The experiments comprised the filling, the static phase and the discharge. The results obtained show that the hopper angle influences the vertical stress at the cylinder-to-hopper transition. Some bottom configurations (flat bottom and bottom with an angle of 30°) led to vertical stresses that exceeded the value calculated according to Eurocode 1. It is clear that further experimental studies are still necessary to understand the underlying physical phenomena and the relations between pressures, silo geometry and flow pattern of the stored material.

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Section: Introductionmentioning

confidence: 99%

“…Experiments in test silos provide pressure values and reliable information to understand the behavior of the bulk material and the flow patterns [7]. In addition, experimental models are used for validations of numerical models [16,[24][25][26].…”

Section: Introductionmentioning

confidence: 99%