TY - JOUR
T1 - Experimental and theoretical studies on compressive deformation characteristics of particle aggregates in water
AU - Kubo, Masaki
AU - Ishibashi, Ryutaro
AU - Sugioka, Kenichi
AU - Tsukada, Takao
AU - Koike, Osamu
AU - Fujita, Masahiro
N1 - Publisher Copyright:
© 2015 Elsevier B.V..
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - The compressive deformation characteristics of a single aggregate of polystyrene particles were studied both experimentally and theoretically. Experimental apparatus to measure the mechanical characteristics of a single aggregate with in situ observation of the compression behavior of the aggregate was constructed. Then, the time variations of the compressive force and deformation behavior of the aggregate during simple compression were investigated. In addition, discrete element method (DEM) simulations were carried out to numerically demonstrate the compression behavior of an aggregate between two planes, where the time variation of the compressive force of the aggregate as well as the area strain of each particle in the aggregate can be predicted. The largest spike-like peak of the compressive force appeared at the stage where an aggregate with a hexagonal bilayer structure was formed, as observed experimentally. The compressive force of the aggregate increased as the number of particles in the aggregate increased or the diameter of the primary particles decreased. An increase in the frictional coefficient between primary particles caused an increase in the compressive force of the aggregate for the entire period of compression, but the frictional coefficient between a particle and a wall did not affect the compressive deformation behavior of the aggregate.
AB - The compressive deformation characteristics of a single aggregate of polystyrene particles were studied both experimentally and theoretically. Experimental apparatus to measure the mechanical characteristics of a single aggregate with in situ observation of the compression behavior of the aggregate was constructed. Then, the time variations of the compressive force and deformation behavior of the aggregate during simple compression were investigated. In addition, discrete element method (DEM) simulations were carried out to numerically demonstrate the compression behavior of an aggregate between two planes, where the time variation of the compressive force of the aggregate as well as the area strain of each particle in the aggregate can be predicted. The largest spike-like peak of the compressive force appeared at the stage where an aggregate with a hexagonal bilayer structure was formed, as observed experimentally. The compressive force of the aggregate increased as the number of particles in the aggregate increased or the diameter of the primary particles decreased. An increase in the frictional coefficient between primary particles caused an increase in the compressive force of the aggregate for the entire period of compression, but the frictional coefficient between a particle and a wall did not affect the compressive deformation behavior of the aggregate.
KW - Compressive deformation
KW - Confocal laser scanning microscope
KW - Discrete element method
KW - Frictional coefficient
KW - Particle aggregate
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U2 - 10.1016/j.powtec.2015.10.010
DO - 10.1016/j.powtec.2015.10.010
M3 - Article
AN - SCOPUS:84945392202
SN - 0032-5910
VL - 287
SP - 431
EP - 438
JO - Powder Technology
JF - Powder Technology
ER -