Effect of Filling Method on Load Distribution in Model Grain Bins

Molenda, M.; Horabik, J.; Ross, I. J.

doi:10.13031/2013.27501

Cited by 16 publications

(20 citation statements)

References 11 publications

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“…When there are variations of approximately ±10% in the bulk density of the filling, the lateral pressure differs greatly (approximately 45%), which also indicates a change in the lateral pressure coefficient k = σ3/σ1; conversely, the lateral pressure rises with the increase in the angle . Molenda et al [7] and Tong et al [11] have found similar tendencies with the change in lateral coefficient.…”

Section: Resultsmentioning

confidence: 80%

“…However, Janssen did not pay attention to the methods of filling and their influence on the lateral pressure in the closely spaced walls. This question was considered much later by scientists such as J. Nielsen [6], M. Molenda et al [7,8], G.K. Klein [9], and A.V. Shkola [10].…”

Section: Introductionmentioning

confidence: 99%

“…The impact of the filling method on the pressure distribution in the silo model was investigated by M. Molenda et al [7]. Experiments were conducted to determine the effect of the filling method and wall type on the radial distribution of the vertical pressure on the bottom of a model bin.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Research on Lateral Pressure of Granular Media Within Closely Spaced Walls Considering Different Filling Conditions

Aniskin

2016

e-GFOS

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This article presents the results of an original experimental research on the lateral pressure acting on closely spaced rigid walls at different angles of granular particle orientation to the horizontal line. Filling was performed at three different predominant angles of grain orientation with respect to the horizontal line: 0°, 45°, and 90°. The aim of the study is to determine the nature of the influence of the particle orientation achieved by filling on the characteristics and distribution of the lateral pressure. In the experiments, a composite medium, i.e. a mixture of quartz sand and flat shell particles in a volume ratio of 2:1, was used. The results of the experiments showed a significant difference in the lateral pressure at different angles of particle orientation. It was found that at an angle of 90°, the average lateral pressure was 44.2% more than that at an angle of 0°.Keywords: granular media, closely spaced parallel walls, lateral pressure, model structure, particle orientation, fill in conditions EKSPERIMENTALNO ISTRAŽIVANJE BOČNOG TLAKA ZRNATOG MATERIJALA NA BLISKO POSTAVLJENE STIJENKE U RAZLIČITIM UVJETIMA ZASIPAVANJA Sažetak: U članku su predstavljeni rezultati originalnih eksperimentalnih istraživanja bočnih tlakova na blisko postavljene paralelne i krute stjenke modela, pri različitim kutovima orijentacije čestica zrnatog materijala u odnosu na horizontalu. Zasipavanje materijala u model izvodilo se na tri različita načina, tako da su dominantni kutovi orijentacije čestica u odnosu na horizontalu bili 0°, 45° i 90°. Svrha istraživanja je utvrditi karakter utjecaja orijentacije čestice ostvarene putem postupka zasipavanja na karakter i distribuciju bočnog tlaka. U eksperimentu je korišten kompozitni medij -mješavina kvarcnog pijeska i plosnatih školjki, u obujamskom omjeru 2 : 1. Rezultati istraživanja pokazali su značajne razlike u bočnim tlakovima pri različitim kutovima orijentacije čestica. Pri kutu od 90°, bočni tlak bio je u prosjeku 44.2 % viši nego pri 0°.

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Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

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Experimental Research on Lateral Pressure of Granular Media Within Closely Spaced Walls Considering Different Filling Conditions

Aniskin

2016

e-GFOS

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“…Loads were measured with an accuracy of ± 0.5 N through a data acquisition system. The experimental set-up allowed for the determination of the distribution of vertical pressure on the bottom σ v between 5 rings, mean lateral pressure σ n , and shear stress τ on the wall (Molenda et al, 1996a). The apparent coefficient of wall friction µ* was determined as the ratio of mean shear stress τ to mean lateral pressure σ n .…”

Section: Methodsmentioning

confidence: 99%

Distribution of static pressure of seeds in a shallow model silo

Horabik¹,

Molenda²

2017

International Agrophysics

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The influence of the filling method, the seed size and the aspect ratio on the radial distribution of the vertical pressure on the floor of a shallow model silo and radial distribution of tangent stress within the material was investigated. Three filling methods were applied: central, circumferential and distributed. Seeds of five varieties were used: horse bean, field pea, wheat, vetch, and rapeseed. Vertical pressure on the floor of a shallow bin was found to be influenced by the filling method and the seed size and aspect ratio. A significant dip of vertical pressure in the middle radial location was observed in all tests, except two: central and circumferential filling of rapeseed. Wall friction was mobilized in the highest degree in the case of the central filling, while the lowest was mobilization of friction in the case of the circumferential filling.

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“…The Eurocode, as well as the majority of published analyses considered cylindrical sample under axi-symmetrical stress with the assumption of material isotropy. Numerous examinations have pointed to considerable anisotropy of granular materials dependent on the shapes of particles and method of generation of the bedding [20,24]. Therefore for this study the uniaxial apparatus of rectangular cross section was constructed to measure loads in the two perpendicular horizontal directions x and y in the sample undergoing deformation in the vertical direction z.…”

Section: Uniaxial Confined Compression Testmentioning

confidence: 99%

Experimental and numerical determination of representative elementary volume for granular plant materials

et al. 2012

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A series of physical and numerical tests were conducted to determine representative elementary volume of granular plant material. The load response of pea grain assembly poured into a cuboid test chamber and subjected to uniaxial confined compression was studied. The apparatus was equipped with adjustable side walls that allowed measurement of boundary stresses in samples of varying thickness. It was found that load distribution varied considerably in samples of thickness smaller than three times the size of the particle. Less pressure variation was observed in grain assemblies of thickness equaled to three, five and seven times the particle size. Comparison between experimental data and numerical DEM results have shown qualitative agreement. It was found that the specimen of dimension not smaller than five times the particle size can be used as a representative elementary volume in confined uniaxial compression test of granular plant materials.

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Effect of Filling Method on Load Distribution in Model Grain Bins

Cited by 16 publications

References 11 publications

Experimental Research on Lateral Pressure of Granular Media Within Closely Spaced Walls Considering Different Filling Conditions

Experimental Research on Lateral Pressure of Granular Media Within Closely Spaced Walls Considering Different Filling Conditions

Distribution of static pressure of seeds in a shallow model silo

Experimental and numerical determination of representative elementary volume for granular plant materials

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