Effect of number of granulometric fractions on structure and micromechanics of compressed granular packings
PBN-AR
Instytucja
Instytut Agrofizyki im. Bohdana Dobrzańskiego Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
Particuology (30pkt w roku publikacji)
ISSN
1674-2001
EISSN
Wydawca
ELSEVIER SCIENCE INC
DOI
URL
Rok publikacji
2018
Numer zeszytu
Strony od-do
88-95
Numer tomu
39
Identyfikator DOI
Liczba arkuszy
Autorzy
Słowa kluczowe
angielski
Granular packings
Granulometric fractions
Structure
Micromechanics
Discrete element method
Streszczenia
Język
angielski
Treść
The role of number of grain size fractions on structural and mechanical properties of uniaxially compressed granular packings with a uniform particle size distribution in terms of number of particles and with various particle size dispersities was studied using the discrete element method. The study addressed packing density, coordination number, contact forces, global stress, and energy dissipation in assemblies composed of frictional spheres. Packing density was found to change with increasing number of granulometric fractions in mixtures with a small ratio of the diameters of the largest to smallest particles. Results indicated a certain value of particle size ratio below which the number of particle size fractions strongly affected packing density. The average coordination number decreased with increasing number of fractions. Detailed analysis of the effect of particle size dispersity on mechanical coordination number, including particles with no less than four contacts, revealed that, contrary to the average coordination number, the mechanical coordination number increased with increasing ratio of the diameters of the largest to smallest particles in the sample. The composition of polydisperse samples strongly affected stress distribution and energy dissipation in granular packings.
Inne
System-identifier
PX-5a8eaed1d5dee0db7bca51dd
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