Effective elastic properties and pressure distribution in bidisperse granular packings: DEM simulations and experiment
PBN-AR
Instytucja
Instytut Agrofizyki im. Bohdana Dobrzańskiego Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Archives of Civil and Mechanical Engineering (30pkt w roku publikacji)
ISSN
1644-9665
EISSN
Wydawca
Elsevier Sp. z o.o.
DOI
URL
Rok publikacji
2017
Numer zeszytu
2
Strony od-do
271-280
Numer tomu
17
Identyfikator DOI
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Autorzy
Słowa kluczowe
en
Binary sphere packings; Discrete element method
Effective elastic modulus
Pressure ratio
Experimental verification
Streszczenia
Język
en
Treść
The effective elastic properties and pressure distribution in granular mixtures depend on both, material and geometric properties of particles. Using the discrete element method, the effect of geometric and statistical factors on the mechanical response of binary packings of steel beads under uniaxial confined compression was studied. The ratio of the diameter of small and large spheres in bidisperse mixtures was chosen to prevent small particles from percolating through bedding. The study addressed lateral-to-vertical pressure ratio and effective elastic modulus of particulate beds. The bimodality of mixtures was found to have a strong effect on the packing density of samples with the ratio between large and small particles larger than 1.3; however, no effect of particle size ratio and contribution of particle size fractions on the distribution of pressure and elasticity of bidisperse packings was observed. Regardless on the composition of mixtures, the lateral-to-vertical pressure ratio followed the same paths with increasing contribution of small particles in mixtures. The effective elastic modulus of granular packings increased with increasing compressive load and was slightly affected by geometric and statistical factors. The experimental data followed the same trend of the DEM predictions; however, only qualitative agreement between numerical and experimental results was obtained. The discrete element method generated packings with smaller density and overpredicted pressure ratios and elastic parameters of mixtures.
Cechy publikacji
discipline:Agronomia
discipline:Agronomy
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:763441
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