On discrete element modelling of compaction of powders with size ratio

Skrinjar, Olle; Larsson, Per-Lennart

doi:10.1016/j.commatsci.2004.02.005

Cited by 69 publications

(21 citation statements)

References 31 publications

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“…Thus Storåkers et al (1997) proposed a contact model which has been used by several authors to model the compaction of granular media (Storåkers et al, 1999;Heyliger and McMeeking, 2001;Martin, 2004;Skrinjar and Larsson, 2004). Nevertheless, those approaches are limited in relative density, because this type of model is based on the assumption that the contacts between the particles can be considered as independent.…”

Section: Introductionmentioning

confidence: 99%

Modeling of high-density compaction of granular materials by the Discrete Element Method

Harthong

Jérier

Dorémus

et al. 2009

International Journal of Solids and Structures

131

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a b s t r a c tCold compaction of metal powders is now commonly studied at a microscopic scale, to further our understanding of contact mechanics between grains. The Discrete Element Method (DEM) is therefore, a good compromise between calculation time and precision. DEM simulations are in general limited to a relative density of about 0.8, because the existing contact laws do not reproduce all the physical phenomena involved in the densification of granular media. Local contact mechanics can be studied by finite element analyses on meshed distinct elements (MDEM, Meshed Distinct Element Method). However, this method is too time-consuming when in the presence of a large number of grains. In the following work, a new analytical contact law will be formulated with MDEM which will subsequently be used to validate the DEM model. Thus, it will be possible with DEM modeling to reproduce high-density compaction of random packings up to a relative density of about 0.95. By introducing a local relative density parameter in the force-displacement relationship, the incompressibility effects which rule high-density behaviors can be introduced in the modeling of powder compaction.

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Section: Introductionmentioning

confidence: 99%

Modeling of high-density compaction of granular materials by the Discrete Element Method

Harthong

Jérier

Dorémus

et al. 2009

International Journal of Solids and Structures

131

View full text Add to dashboard Cite

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“…These analysis enabled Larsson et al [8] to investigate cold and hot compaction of monolithic powders followed by a more comprehensive study of compaction of composite powders at more general loading situations by Storåkers et al [9]. Further progress was achieved with the discrete element method, DEM, as done by Skrinjar and Larsson [10,11] and by Martin et al [12] and Martin and Bouvard [13]. In refs.…”

Section: Introductionmentioning

confidence: 94%

“…In refs. [10][11][12][13] it was shown that during packing of particles and at the first onset of loading the major densification mechanism is rearrangements of particles. In this context it should also be mentioned that in a recent study Skrinjar et al [14] derived approximate but accurate relations describing contact between dissimilar particles in a fairly general situation.…”

Section: Introductionmentioning

confidence: 99%

“…Also the resulting global relations based on the contacts laws will be scrutinized. Some important findings from previous DEM simulations [10,11], will also be evaluated based on the finite element results. In order to limit the extent of the present investigation there will be no attempts made to correlate the present findings with macroscopic constitutive equations often used to model powder compaction, cf.…”

Section: Introductionmentioning

confidence: 99%

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On the local contact behaviour in regular lattices of composite powders

Skrinjar

Larsson

2007

Journal of Materials Processing Technology

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“…For example, it has been combined with explicit dynamics to study the isostatic compression of powders [20], the dynamic compaction characteristics of granular ceramics [21], the packing densification of particles under compression [22] and the effect of particle size distribution on the uniaxial compressive behaviour of particles [23]. In addition to this, DEM simulations have also been used to study the influence of particle shape and inter-particle friction on the mechanical response of particles under uniaxial compression [24] as well as the particle contact evolution in the uniaxial compression of dissimilar powders [25].…”

Section: Introductionmentioning

confidence: 99%

A discrete element model to predict the pressure-density relationship of blocky and angular ceramic particles under uniaxial compression

2015

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In this study, we present a numerical model based on the discrete element method (DEM) that incorporates contact friction and rolling resistance to simulate the uniaxial, isostatic compaction of hard, blocky and angular ceramic powders. The model has been formulated using the open-source software, YADE. In this numerical model, packing followed by the compaction of up to 25,000 powder particles has been simulated and the HertzMindlin contact model has been used to simulate the rolling resistance and contact friction between the particles. The numerical model is discussed in detail and the pressure-density relationships developed by this model are compared with experimental data derived during the course of this study as well as data from two previous studies. Overall, the proposed simplistic DEM model is shown to produce good agreement with test results under considered loading conditions.

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On discrete element modelling of compaction of powders with size ratio

Cited by 69 publications

References 31 publications

Modeling of high-density compaction of granular materials by the Discrete Element Method

Modeling of high-density compaction of granular materials by the Discrete Element Method

On the local contact behaviour in regular lattices of composite powders

A discrete element model to predict the pressure-density relationship of blocky and angular ceramic particles under uniaxial compression

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