Exploració per autor "Ciantia, Matteo Oryem"Més informació

Ara es mostren els items 21-40 de 43

    • Grain roughness effect on the critical state line of crushable sands 

      Lei, Jiangtao; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Zhang, Ningning (University of Dundee, 2021)
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      A recently proposed DEM model for materials with rough crushable grains (Zhang et al. 2021; Ciantia et al. 2015; Otsubo et al. 2017) is here employed to examine the effect of contact roughness on the critical state line, ...

    • High resolution incremental stress testing of crushable granular materials 

      Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (EDP Sciences, 2019)
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      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
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      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 ...

    • Incorporating surface roughness into DEM models of crushable soils 

      Zhang, Ningning; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Gens Solé, Antonio (ITASCA Consulting Group, 2020)
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      One obvious characteristic of granular grains is that their surface is not smooth, especially when observed at smaller scales. Some advanced experiment imaging methods such as optical interferometry, scanning electron ...

    • Irreversible behaviour of crushable sands: a DEM study 

      Gens Solé, Antonio; Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos (2017)
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      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)
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      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)
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      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)
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      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 ...

    • On the stability of underground caves in calcareous rocks due to long-term weathering 

      Mánica Malcom, Miguel Ánge; Ciantia, Matteo Oryem; Gens Solé, Antonio (2020-09)
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      This paper addresses the problem of the stability of structures on calcareous rocks due to long-term weathering processes. The case study consists of a building resting on a calcarenite rock formation where two abandoned ...

    • 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)
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      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)
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      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 ...

    • PFEM analysis of installation effects on axial performance of jacked piles in chalk 

      Ciantia, Matteo Oryem; Lei, Jiangtao; Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
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      Chalk is present in a large area of the East and South coast of the UK where renewables are now being installed. In most cases they are founded on displacement piles, whose design uses empirical methods or partial ...

    • Plasticity for crushable granular materials via DEM 

      Gens Solé, Antonio; Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos (CIMNE, 2015)
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      The mechanical behavior of crushable granular materials is characterized by strong non-linearity and irreversibility. In this paper, the incremental behavior of crushable granular soils is investigated by numerically ...

    • Simplifying calibration of bonded elasto-plastic models 

      Rios, Sara; Ciantia, Matteo Oryem; Gonzalez, Nubia Aurora; Arroyo Alvarez de Toledo, Marcos; Viana da Fonseca, A. (2016-03)
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      Using realistic constitutive models for artificially cemented soils is advantageous in design. However, the price of that increased realism is often a more elaborate model, which is difficult to calibrate. A database of ...

    • Simulation of cement-improved clay structures with a bonded elasto-plastic model: A practical approach 

      Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Castellanza, Riccardo; Gens Solé, Antonio; Nova, Roberto (2012-09)
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      Accés restringit per política de l'editorial
      Engineering practice has usually dealt with the treated soil bodies using simplistic constitutive models (e.g. elastic perfectly-plastic Mohr–Coulomb). In this paper, a more refined bonded elasto-plastic model is here ...

    • Simulation of penetration problems in geomechanics 

      Gens Solé, Antonio; Arroyo Alvarez de Toledo, Marcos; Carbonell Puigbó, Josep Maria; Ciantia, Matteo Oryem; Monforte Vila, Lluís (CIMNE, 2017)
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      The simulation of penetration problems in geomaterials is a challenging problem as it involves large deformations and displacements as well as strong non-linearities affecting material behaviour, geometry and contact ...

    • Simulation of penetration problems in geomechanics 

      Gens Solé, Antonio; Arroyo Alvarez de Toledo, Marcos; Carbonell Puigbó, Josep Maria; Ciantia, Matteo Oryem; Monforte Vila, Lluís (2017)
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      The simulation of penetration problems in geomaterials is a challenging problem as it involves large deformations and displacements as well as strong non-linearities affecting material behaviour, geometry and contact ...

    • Simulation of the cone penetration test: discrete and continuum approaches 

      Gens Solé, Antonio; Arroyo Alvarez de Toledo, Marcos; Butlanska, Joanna; Monforte Vila, Lluís; Carbonell, J.M.; Ciantia, Matteo Oryem; O'Sullivan, Catherine (Australian Geomechanics Society, 2016)
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      The paper presents the modelling of the cone penetration test using two procedures: a discrete approach and a continuum approach. The discrete approach is based on the Discrete Element Method where a granular material is ...

    • Sobre la simulación numérica de materiales cuasi-frágiles en problemas de ingeniería 

      Mánica Malcom, Miguel Ángel; Ciantia, Matteo Oryem; Gens Solé, Antonio (Sociedad Mexicana de Ingeniería Geotécnica (SMIG), 2021)
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      Una gran cantidad de materiales en la naturaleza muestran un comportamiento frágil (o cuasi-frágil) en donde, después de alcanzar una carga máxima, exhiben una considerable (o total) reducción de su resistencia (reblandecimiento). ...

    • Standard penetration testing in a virtual calibration chamber 

      Zhang, Ningning; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Gens Solé, Antonio; Butlanska, Joanna (Elsevier, 2019-07)
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      Accés obert
      The virtual calibration chamber technique, based on the discrete element method, is here applied to study the standard penetration test (SPT). A macro-element approach is used to represent a rod driven with an impact like ...