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Micro mechanics of the critical state line at high stresses

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

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Authors

John P. de Bono



Abstract

A critical state line is presented for a crushable numerical soil, which is parallel to the isotropic normal compression line. A previous theory for the normal compression line, which correctly predicts the slope as a function of the size-effect on particle strength is extended to justify the slope of the critical state line. The micro mechanics behind critical states are examined, leading to a theory for a relationship between the volume of smallest particles and mean effective stress. A unique relationship exists for crushed states, leading to a two-dimensional interpretation of the state boundary surface for soils looser than critical.

Citation

de Bono, J. P., & McDowell, G. R. (2018). Micro mechanics of the critical state line at high stresses. Computers and Geotechnics, 98, https://doi.org/10.1016/j.compgeo.2018.02.016

Journal Article Type Article
Acceptance Date Feb 19, 2018
Online Publication Date Feb 23, 2018
Publication Date Jun 1, 2018
Deposit Date Feb 22, 2018
Publicly Available Date Feb 23, 2018
Journal Computers and Geotechnics
Print ISSN 0266-352X
Electronic ISSN 1873-7633
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 98
DOI https://doi.org/10.1016/j.compgeo.2018.02.016
Keywords Discrete element method; DEM; Particle crushing; Critical state line; State boundary surface
Public URL https://nottingham-repository.worktribe.com/output/935646
Publisher URL https://www.sciencedirect.com/science/article/pii/S0266352X18300521

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