Contact impingement in packings of elastic–plastic spheres, application to powder compaction

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

doi:10.1016/j.ijmecsci.2012.04.013

Cited by 58 publications

(35 citation statements)

References 38 publications

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“…At higher densities, such an assumption is no longer accurate. It should be noted that research has been conducted in order to include the effect from neighboring contacts into micromechanical modeling of powder compaction (Ref 6,7).…”

Section: Introductionmentioning

confidence: 99%

On the Influence of Material Parameters in a Complex Material Model for Powder Compaction

Staf

Lindskog

Andersson

et al. 2016

J. of Materi Eng and Perform

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Parameters in a complex material model for powder compaction, based on a continuum mechanics approach, are evaluated using real insert geometries. The parameter sensitivity with respect to density and stress after compaction, pertinent to a wide range of geometries, is studied in order to investigate completeness and limitations of the material model. Finite element simulations with varied material parameters are used to build surrogate models for the sensitivity study. The conclusion from this analysis is that a simplification of the material model is relevant, especially for simple insert geometries. Parameters linked to anisotropy and the plastic strain evolution angle have a small impact on the final result.

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Section: Introductionmentioning

confidence: 99%

On the Influence of Material Parameters in a Complex Material Model for Powder Compaction

Staf

Lindskog

Andersson

et al. 2016

J. of Materi Eng and Perform

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show abstract

“…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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“…The model presented here makes use of the geometrical grain scale data obtained from μCT in the framework of combined discretefinite-element method (Munjiza, 2004;Harthong et al, 2012) to model the individual grains and their interactions under loading. The idea consists of virtualising the soil fabric by meshing the constituent grains and allowing them to interact and deform according to appropriate constitutive model and frictional contact conditions.…”

Section: Introductionmentioning

confidence: 99%