On the micro mechanics of one-dimensional normal compression

McDowell, Glenn R. and de Bono, John P. (2015) On the micro mechanics of one-dimensional normal compression. Geotechnique, 63 (11). pp. 895-908. ISSN 1751-7656

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Abstract

Discrete-element modelling has been used to investigate the micro mechanics of one-dimensional compression. One-dimensional compression is modelled in three dimensions using an oedometer and a large number of particles, and without the use of agglomerates. The fracture of a particle is governed by the octahedral shear stress within the particle due to the multiple contacts and a Weibull distribution of strengths. Different fracture mechanisms are considered, and the influence of the distribution of fragments produced for each fracture on the global particle size distribution and the slope of the normal compression line is investigated. Using the discrete-element method, compression is related to the evolution of a fractal distribution of particles. The compression index is found to be solely a function of the strengths of the particles as a function of size.

Item Type: Article
Keywords: compressibility ; discrete-element modelling ; fractals ; particle crushing/crushability ; particle-scale behaviour
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Civil Engineering
Identification Number: 10.1680/geot.12.P.041
Depositing User: McDowell, Prof Glenn
Date Deposited: 08 Apr 2013 10:42
Last Modified: 14 Oct 2017 06:21
URI: http://eprints.nottingham.ac.uk/id/eprint/1959

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