Now showing items 1-20 of 29

    • A new efficient strategy to simulate particle breakage in DEM analyses 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Calvetti, Francesco (2014)
      Conference report
      Restricted access - publisher's policy
      The discrete element method (DEM) is increasingly gaining acceptance as a modelling tool for engineering problems of direct geotechnical relevance. One area for which the method seems naturally well adapted is that of ...
    • A new strategy to simulate particle crushing in DEM analysis 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Calvetti, Francesco (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
      Conference report
      Open Access
      The discrete element method (DEM) is progressively gaining acceptance as a modelling tool for engineering problems of direct geotechnical relevance. One area for which the method seems naturally well adapted is that of ...
    • A numerical investigation of the incremental behavior of crushable granular soils 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Calvetti, Francesco; Gens Solé, Antonio (2016-09)
      Article
      Open Access
      The mechanical behavior of granular materials is characterized by strong nonlinearity and irreversibility. These properties have been differently described by a variety of constitutive models. To test any constitutive ...
    • A soft-rock model for cement-improved clays 

      Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Castellanza, R.; Gens Solé, Antonio (IOS Press, 2011)
      Conference report
      Restricted access - publisher's policy
    • A stable mesh-independent approach for numerical modelling of structured soils at large strains 

      Monforte Vila, Lluís; Ciantia, Matteo Oryem; Carbonell Puigbó, Josep Maria; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (Elsevier, 2019-12)
      Article
      Restricted access - publisher's policy
      We describe the large strain implementation of an elasto-plastic model for structured soils into G-PFEM, a code developed for geotechnical simulations using the Particle Finite Element Method. The constitutive model is ...
    • An Approach to enhance efficiency of DEM modelling of soils with crushable grains 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Calvetti, Francesco; Gens Solé, Antonio (Thomas Telford, 2015-02)
      Article
      Open Access
      In this study oedometric compression tests of hydrocarbon coke, Fontainebleau sand and silica sand are simulated in three dimensions using breakable particles. The method adapts a rigorous breakage criterion for elasto-brittle ...
    • Breakage and critical state via DEM 

      Ciantia, Matteo Oryem; O'Sullivan, Catherine; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2019)
      Conference report
      Open Access
      Discrete-element simulations are used to explore the relation between breakage-induced grading evolution and the critical state line position on the compression plane. An efficient model of particle breakage is applied to ...
    • DEM modelling of a double-porosity crushable granular material 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Butlanska, Joanna; Gens Solé, Antonio (CRC Press, 2014)
      Conference report
      Restricted access - publisher's policy
      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 ...
    • DEM modelling of cone penetration tests in a double-porosity crushable granular material 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Butlanska, Joanna; Gens Solé, Antonio (2016-03)
      Article
      Open Access
      A three-dimensional discrete element model is used to investigate the effect of grain crushing on the tip resistance measured by cone penetration tests (CPT) in calibration chambers. To do that a discrete analogue of pumice ...
    • DEM modelling of dynamic penetration in granular material 

      Zhang, Ming; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Ciantia, Matteo Oryem (CRC Press, 2018)
      Conference lecture
      Restricted access - publisher's policy
      Dynamic penetration has been widely employed in some site investigation procedures and for the installation of driven piles. A 3-dimensional discrete element method model has been developed to simulate dynamic rod penetration ...
    • G-PFEM numerical assessment of screw pile undrained capacity 

      Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Ciantia, Matteo Oryem (University of Dundee, 2019)
      Conference report
      Open Access
      This contribution describes a preliminary parametric analysis of the factors affecting the pull-out resistance of screw-piles in undrained conditions. The numerical simulations rely on the Particle Finite Element method, ...
    • Grading evolution and critical state in a discrete numerical model of Fontainebleau sand 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; O'Sullivan, Catherine; Gens Solé, Antonio; Liu, T. (Thomas Telford, 2019-01)
      Article
      Open Access
      Granular materials reach critical states upon shearing. The position and shape of a critical state line (CSL) in the compression plane are important for constitutive models, interpretation of in situ tests and liquefaction ...
    • High resolution incremental stress testing of crushable granular materials 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (EDP Sciences, 2019)
      Conference report
      Open Access
      The incremental behaviour of crushable sands is investigated by means of a Discrete Element Method (DEM) based analogue. The DEM sample is subjected to a comprehensive set of small stress perturbations in the triaxial plane ...
    • Impermeable membranes for slab-track settlement mitigation 

      Pérez Romero, Joaquín; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Vaunat, Jean (2018-08)
      Article
      Open Access
      A series of numerical simulations is used to explore the effect of the geometrical disposition of impermeable membranes in the overall performance of slab-track railway earthworks, with particular reference to the generation ...
    • Irreversible behaviour of crushable sands: a DEM study 

      Gens Solé, Antonio; Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos (2017)
      Conference report
      Restricted access - publisher's policy
      The irreversible behaviour of crushable sands is investigated by means of a Discrete Element Method (DEM) analogue. The calculations have been performed using a recently developed procedure to simulate particle crushing ...
    • Mechanical and Thermal DEM analyses of baled MSW storage 

      Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem (International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2017)
      Conference report
      Restricted access - publisher's policy
      Municipal solid waste is sometimes stored in baled form either before or after treatment. General design requirements for MSW landfills, such as slope stability and lining long-term integrity are still relevant for bale ...
    • Micromechanical inspection of incremental behaviour of crushable soils 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; O'Sullivan, Catherine; Gens Solé, Antonio (Springer, 2019-10)
      Article
      Open Access
      In granular soils grain crushing reduces dilatancy and stress obliquity enhances crushability. These are well-supported specimen-scale experimental observations. In principle, those observations should reflect some peculiar ...
    • On the incremental behaviour of sands at high stresses 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2019)
      Conference report
      Open Access
      The mechanical behaviour of granular materials is characterized by strong non-linearity and irreversibility. In particular, particle breakage will induce additional plastic deformations beyond those which might be expected ...
    • Particle failure in DEM models of crushable soil response 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Calvetti, Francesco (CRC Press Taylor & Francis Group, 2014)
      Conference report
      Restricted access - publisher's policy
      The Discrete Element Method (DEM) is progressively gaining acceptance as a modelling tool for engineering problems of direct geotechnical relevance. One area for which the method seems naturally well adapted is that of ...
    • Periodic cells for large-scale problem initialization 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Zhang, Ningning; Emam, Sacha (EDP Sciences, 2017)
      Conference report
      Open Access
      In geotechnical applications the success of the discrete element method (DEM) in simulating fundamental aspects of soil behaviour has increased the interest in applications for direct simulation of engineering scale boundary ...