Study of cold powder compaction by using the discrete element method

Jérier, Jean-François; Hathong, B.; Richefeu, Vincent; Chareyre, Bruno; Imbault, D.; Donzé, Frédéric‐Victor; Dorémus, P.

doi:10.1016/j.powtec.2010.08.056

Cited by 81 publications

(40 citation statements)

References 18 publications

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“…This is encouraging and indicates that the analytical model could be of practical value. Contrary to the contact models proposed by Donzé et al [6,7], our analytical model avoids volume estimates based on Voronoi constructions, which are time-consuming to calculate. However, before the model can be fully utilised in DEM simulations, procedures are needed to handle large strains when contact impingement occurs.…”

Section: Resultsmentioning

confidence: 99%

“…Promising advances in this area have been made by Donzé et al [6,7], who used volume estimates based on Voronoi constructions in order to enforce the constraint imposed by plastic incompressibility. Aiming mainly at overall global models for powder compression, Montes et al [8] have introduced the concept of the effective pressure acting on the interparticle contacts, resulting in an interdependence between contacts that again arises from geometric constraints.…”

Section: Introductionmentioning

confidence: 99%

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Towards a mechanistic model for the interaction between plastically deforming particles under confined conditions: A numerical and analytical analysis

Frenning

2013

Materials Letters

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Triaxial compression of plastically deforming particles was studied with the finite element method in order to identify the mechanisms that underlie their mechanical response under confined conditions. In addition to the established elastoplastic behaviour at small and intermediate strains, the coalescence of plastic zones centred at contacts resulted in a reduced stiffness, whereas a significantly increased stiffness was seen once the material displaced by plastic deformation filled the ambient void space, signifying the onset of a stage dominated by elastic volume reduction. Moreover, an analytical model for multiple simultaneous contacts was formulated, assuming that the deformed particle shape could be approximated by a truncated sphere and that the behaviour of each individual contact could be described in terms of a hardness. The thus obtained model exhibited a promising agreement with the numerical results.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Towards a mechanistic model for the interaction between plastically deforming particles under confined conditions: A numerical and analytical analysis

Frenning

2013

Materials Letters

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“…Gonzalez and Cuitiño [12] attempted to overcome the restriction of independent contacts by the formulation of an analytical contact model for elastically deforming particles using an extension of the Hertz theory. Harthong et al [13][14][15] have developed a contact model using a combined FEM/DEM analysis including Voronoi tessellations (as introduced to the area by Arzt [16]) specifically for studying high levels of particle densification under confined conditions. However, despite progress in contact model development, the dominating opinion within the research field still seems to be that new contact models for high degrees of densification are needed.…”

Section: Introductionmentioning

confidence: 99%

An apparatus for confined triaxial testing of single particles

et al. 2015

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A novel triaxial apparatus employing overlapping rigid boundaries has been designed and constructed for experimental measurement of contact forces under confined compression of single granules in the mm-scale. The performance of the apparatus was evaluated by performing uniaxial and triaxial compression experiments on ideal elastic-plastic materials.Compression curves were compared with the fully plastic Abbott-Firestone contact model and with results from FEM simulations. The increase in contact force associated with confined conditions was observed in the compression curves from triaxial compression experiments, as supported by predictions from simulations using single particle contact models. Hence, a new method for the assessment of mechanical behaviour of single particles under confined compression can be considered as established.

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“…Basically, the discrete (micro) and continuum (macro) techniques are developed to model the powder compaction process [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…In discrete (micro) techniques, there have been taken several simplifying assumptions into the computation to alleviate the problem complexity and computational cost [3][4][5]. However in the continuum (macro) models, the use of appropriate plasticity models have been a great interest in modeling the micro-powder forming [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Compaction simulation of nano-crystalline metals with molecular dynamics analysis

et al. 2016

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Abstract. The molecular-dynamics analysis is presented for 3D compaction simulation of nano-crystalline metals under uniaxial compaction process. The nano-crystalline metals consist of nickel and aluminum nano-particles, which are mixed with specified proportions. The EAM pair-potential is employed to model the formation of nano-particles at different temperatures, number of nano-particles, and mixing ratio of Ni and Al nano-particles to form the component into the shape of a die. The die-walls are modeled using the Lennard-Jones inter-atomic potential between the atoms of nano-particles and die-walls. The forming process is model in uniaxial compression, which is simulated until the full-dense condition is attained at constant temperature. Numerical simulations are performed by presenting the densification of nano-particles at different deformations and distribution of dislocations. Finally, the evolutions of relative density with the pressure as well as the stress-strain curves are depicted during the compaction process.

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Study of cold powder compaction by using the discrete element method

Cited by 81 publications

References 18 publications

Towards a mechanistic model for the interaction between plastically deforming particles under confined conditions: A numerical and analytical analysis

Towards a mechanistic model for the interaction between plastically deforming particles under confined conditions: A numerical and analytical analysis

An apparatus for confined triaxial testing of single particles

Compaction simulation of nano-crystalline metals with molecular dynamics analysis

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