Micro mechanics of the critical state line at high stresses

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

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