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Discrete element modelling of cyclic loading of crushable aggreates

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Abstract

This paper examines the discrete element modelling of cyclic loading of an aggregate of crushable sand grains. Each grain of sand is modelled as an agglomerate of balls bonded together. The aggregate is subjected to compaction followed by isotropic normal (plastic) compression, and then unloaded to half the maximum applied stress. The aggregate is then subjected to cyclic loading to a maximum stress ratio of 0.8. The aim of the paper is to examine the reduction of the rate of axial strain with number of cycles, and to determine the relative influences of volumetric strain and shear strain rates on the axial strain rate. In particular, the paper aims to show whether particle breakage is mainly related to the accumulation of volumetric strain. This is found to be the case, which is consistent with proposals by other authors that plastic hardening under monotonic loading is due to particle fracture.

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Authors and Affiliations

  1. School Civil Engineering, University of Nottingham, University park, Nottingham, NG7 2RD , UK

    O. Harireche & G.R. McDowell

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  1. O. Harireche
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  2. G.R. McDowell
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Correspondence to G.R. McDowell.

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Harireche, O., McDowell, G. Discrete element modelling of cyclic loading of crushable aggreates. GM 5, 147–151 (2003). https://doi.org/10.1007/s10035-003-0143-9

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  • DOI: https://doi.org/10.1007/s10035-003-0143-9

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