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Compression mechanics of granule beds: A combined finite/discrete element study
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmacy.
2010 (English)In: Chemical Engineering Science, ISSN 0009-2509, E-ISSN 1873-4405, Vol. 65, no 8, p. 2464-2471Article in journal (Refereed) Published
Abstract [en]

Compression of three-dimensional beds comprising 1000 plastically deforming initially spherical granules is investigated by using the combined finite/discrete element (FE/DE) method. The material model is formulated within the framework of multiplicative plasticity, and utilizes a density-dependent elliptic yield surface that allows porous particles to both deform and to densify plastically, whereas only volume-preserving plastic deformation is possible for nonporous ones. Granules with different characteristics (yield stress and initial porosity) are studied, and the relationship between the single-granule properties and the global compression behaviour of the granule bed is investigated. It is demonstrated that the FE/DE method may shed light on the deformation and densification behaviour of individual granules, since the size and shape of each granule are continually determined as an integral part of the solution procedure, and that the method thus provides a comprehensive picture of the processes occurring during confined compression of granular materials. (C) 2010 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2010. Vol. 65, no 8, p. 2464-2471
Keywords [en]
Granular materials, Particulate processes, Powder technology, Solid mechanics, Mathematical modelling, Numerical analysis
National Category
Pharmaceutical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-137087DOI: 10.1016/j.ces.2009.12.029ISI: 000276468200004OAI: oai:DiVA.org:uu-137087DiVA, id: diva2:378053
Available from: 2010-12-15 Created: 2010-12-15 Last updated: 2018-01-12Bibliographically approved

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