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DEM modelling of a double-porosity crushable granular material

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hdl:2117/27218

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Ciantia, Matteo OryemMés informació
Arroyo Álvarez de Toledo, MarcosMés informacióMés informacióMés informació
Butlanska, Joanna
Gens Solé, AntonioMés informacióMés informacióMés informació
Document typeConference report
Defense date2014
PublisherCRC Press
Rights accessRestricted access - publisher's policy
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
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).
CitationCiantia, M. [et al.]. DEM modelling of a double-porosity crushable granular material. A: International Symposium on Geomechanics from Micro to Macro. "Geomechanics from micro to macro: proceedings of the TC105 ISSMGE international symposium on geomechanics from micro to macro: Cambridge, UK, 1-3 September 2014". Cambridge: CRC Press, 2014, p. 269-274. 
URIhttp://hdl.handle.net/2117/27218
ISBN978-1-138-02707-7
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  • Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica (fins octubre 2015) - Ponències/Comunicacions de congressos [429]
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