Influence of particle shape and sample width on uniaxial compression of assembly of prolate spheroids examined by discrete element method
PBN-AR
Instytucja
Instytut Agrofizyki im. Bohdana Dobrzańskiego Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
ISSN
0378-4371
EISSN
Wydawca
ELSEVIER SCIENCE BV
DOI
URL
Rok publikacji
2014
Numer zeszytu
Strony od-do
279-289
Numer tomu
416
Identyfikator DOI
Liczba arkuszy
Autorzy
Słowa kluczowe
angielski
Uniaxial compression; Discrete element method; Granular mechanics; Prolate spheroids; 2D–3D transition
Streszczenia
Język
Treść
We use numerical simulations based on the discrete element method (DEM) to study the response of a cuboidal assembly of spherical (diameter dd) or spheroidal particles to uniaxial compression. This study examines the influences of slight deviations from the spherical shape of particles or of the thickness of cuboidal samples on the packing and mechanical characteristics of the assembly. The spheroidal particles were fabricated by the multisphere method. Eight different particle shapes were considered, each with the same volume and with aspect ratios αα from 1.01.0 to 2.52.5. The final vertical height and larger horizontal depth of the cuboidal deposit were 15d15d, whereas the thickness ranged from 1.025d1.025d to 10d10d. Upon increasing the assembly thickness or deviating from a spherical shape, numerical examinations by the DEM revealed clear differences in the packing structure and uniaxial compression of assemblies of spheroidal particles. The departure from a spherical shape results in intense changes in contact network, which is manifested as changes in the volume fraction, mean number of contacts per particle, and ordering of the deposits. For the more elongated particles, the pressure ratio as a function of spheroid aspect ratio reached nearly constant values regardless of the sample thickness.
Cechy publikacji
ORIGINAL_ARTICLE
Inne
System-identifier
594387
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