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Numerical investigation of particle breakage as applied to mechanical crushing: Part 2: Interparticle breakage
Luleå University of Technology.
Luleå University of Technology.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Center for Rock Instability & Seismicity Research, Northeastern University, Shenyang.
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2001 (English)In: International Journal of Rock Mechanics And Mining Sciences, ISSN 1365-1609, E-ISSN 1873-4545, Vol. 38, no 8, p. 1163-1172Article in journal (Refereed) Published
Abstract [en]

A numerical approach to interparticle breakage is applied using the rock failure process analysis code, RFPA2D. A 2D particle assembly in a container is first numerically simulated to obtain the fringe patterns of stress fields that resemble the photoelastic test. Then, in addition, the interparticle breakage of the particle assembly in a chamber is conducted. The chamber consists of a steel container and a steel platen for transferring the load, and contains 15 particles of arbitrary sizes and irregular shapes. A plane strain condition is assumed. The particle bed is loaded under form conditions, in which the size reduction and the applied force are a function of the displacement. The numerical results indicate that, during the crushing process, three principal regimes appear: (i) the elastic deformation regime, where each particle deforms elastically; (ii) the fragmentation regime, where the particle assembly is crushed in a particle-by-particle fashion; and (iii) the assembly hardening regime, where the densified assembly recovers a significant stiffness. The dominant mode of failure is at first splitting, which is more or less parallel to the loading direction, and then progressive crushing, which mainly depends on the confinement from the chamber walls. The analysis of the load–displacement curves of the assembly obtained from the simulations reveals a high undulating load plateau, which suggests a macro-ductile behaviour.

Place, publisher, year, edition, pages
2001. Vol. 38, no 8, p. 1163-1172
National Category
Other Civil Engineering
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-2605DOI: 10.1016/S1365-1609(01)00076-4ISI: 000175449300007Scopus ID: 2-s2.0-0035739083Local ID: 03cb2a30-c0ed-11db-834c-000ea68e967bOAI: oai:DiVA.org:ltu-2605DiVA, id: diva2:975458
Note
Validerad; 2001; 20070220 (pafi)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Lindqvist, Per-Arne

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