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On the micro mechanics of one-dimensional normal compression

McDowell, Glenn R.; de Bono, John P.

Authors

John P. de Bono



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.

Citation

McDowell, G. R., & de Bono, J. P. (2015). On the micro mechanics of one-dimensional normal compression. Géotechnique, 63(11), https://doi.org/10.1680/geot.12.P.041

Journal Article Type Article
Acceptance Date Feb 22, 2013
Publication Date Sep 1, 2015
Deposit Date Apr 8, 2013
Publicly Available Date Sep 1, 2015
Journal Geotechnique
Print ISSN 0016-8505
Electronic ISSN 1751-7656
Publisher Thomas Telford
Peer Reviewed Peer Reviewed
Volume 63
Issue 11
DOI https://doi.org/10.1680/geot.12.P.041
Keywords compressibility ; discrete-element modelling ; fractals ; particle crushing/crushability ; particle-scale behaviour
Public URL https://nottingham-repository.worktribe.com/output/982414
Publisher URL http://www.icevirtuallibrary.com/content/article/10.1680/geot.12.P.041;jsessionid=4l480pd9cff7u.x-telford-live-01

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