Fabric anisotropy & DEM informed two-surface hyperplasticity: constitutive formulation, asymptotic states & experimental validation

Coombs, W.M.; Crouch, R.S.

Abstract

In geotechnical analysis continuum idealisations of the bulk material still provide the most appropriate approach for engineers designing large-scale structures. In this area, the most successful framework for describing the behaviour of soils is Critical State (CS) soil mechanics. However, the findings from discrete element method (DEM) analysis, such as the uniqueness of the CS, can provide invaluable information in the development such models. This paper details the key concepts behind a two-surface hyperplasticity model (?) whose development was informed by recent DEM findings on the uniqueness of the CS. Asymptotic states of the model will be confirmed and the DEM-continuum-experimental loop will be closed through comparison of the developed model with experimental data on coarse-grained particulate media. This will demonstrate, that providing the previous stress history is accounted for, the proposed model is suitable for a variety of particulate media.

Citation

Coombs, W., & Crouch, R. (2014, August). Fabric anisotropy & DEM informed two-surface hyperplasticity: constitutive formulation, asymptotic states & experimental validation. Presented at TC105 ISSMGE international symposium on Geomechanics from Micro to Macro, Cambridge, UK

• Presentation Conference Type: Conference Paper (published)
• Conference Name: TC105 ISSMGE international symposium on Geomechanics from Micro to Macro
• Publication Date: Aug 26, 2014
• Deposit Date: Sep 11, 2014
• Publicly Available Date: Feb 26, 2016
• Pages: 777-782
• Book Title: Geomechanics from micro to macro : IS-Cambridge 2014, 1-3 September, Cambridge, UK ; proceedings.
• Public URL: https://durham-repository.worktribe.com/output/1154131
• Publisher URL: http://www.crcpress.com/product/isbn/9781138027077
• Additional Information: Symposium's dates: 1 - 3 September 2014