DEM modelling of a double-porosity crushable granular material

M. O. Ciantia, Marcos Arroyo, J. Butlanska, A. Gens

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

The effect of grain crushing during one dimensional compression and triaxial compression tests is investigated in a double-porosity granular material using the Discrete Element Method (DEM). Experimental tests results from the literature on a porous crushable soil (pumice sand) were simulated in 3-D using a large number of particles and without the use of agglomerates. The numerical simulations show the importance of incorporating internal porosity as a material characteristic. The variation of internal porosity with particle dimensions is of fundamental importance while describing the mechanical behavior of the material. The contact model parameters were calibrated using low confinement triaxial compression experimental tests while the particle failure criteria was calibrated using high pressure one dimensional compression tests. Particle strength size effect was assumed equal to that observed in other porous geomaterials and ultimately derived from the variation of internal porosity. The good fit to experimental macroscopic observations thus attained lends credibility to numerical inferences about the evolution under loading of porosity fractions (intergranular and intragranular).

Original languageEnglish
Title of host publicationGeomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014
PublisherTaylor & Francis
Pages269-274
Number of pages6
Volume1
ISBN (Print)9781138027077
Publication statusPublished - 2015
EventInternational Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014 - Cambridge, United Kingdom
Duration: 1 Sep 20143 Sep 2014
http://is-cambridge.eng.cam.ac.uk/

Conference

ConferenceInternational Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014
Country/TerritoryUnited Kingdom
CityCambridge
Period1/09/143/09/14
Internet address

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