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An apparatus for confined triaxial testing of single particles
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmacy.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmacy.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmacy.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
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2015 (English)In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 270, 121-127 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2015. Vol. 270, 121-127 p.
Keyword [en]
Compression, Triaxial, Single particles, Confined conditions, Apparatus design, Contact mechanics
National Category
Pharmaceutical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-239203DOI: 10.1016/j.powtec.2014.10.016ISI: 000347579300014OAI: oai:DiVA.org:uu-239203DiVA: diva2:773633
Funder
Swedish Research Council, 621-2011-4049
Available from: 2014-12-19 Created: 2014-12-19 Last updated: 2017-12-05Bibliographically approved

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Jonsson, HenrikGråsjö, JohanNordström, JosefinaJohansson, NiklasFrenning, Göran
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Department of PharmacyDepartment of Physics and Astronomy
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