Now showing items 1-6 of 6

    • Image-based calibration of rolling resistance in discrete element models of sand 

      Rorato, Riccardo; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Andò, Edward; Viggiani, Gioacchino (Elsevier, 2021-03)
      Article
      Restricted access - publisher's policy
      Models that introduce rolling resistance at the contact are widely employed in simulations using the discrete element method (DEM) to indirectly represent particle shape effects. This approach offers substantial computational ...
    • Imaging and discrete modelling of sand shape 

      Rorato, Riccardo (Universitat Politècnica de Catalunya, 2019-11-08)
      Doctoral thesis
      Open Access
      The shape of particles is known to play an important role in soil behaviour, with significant effects of engineering responses. Investigating how the shape of particles can be measured and quantified is therefore considered ...
    • Linking shape and rotation of grains during triaxial compression of sand 

      Rorato, Riccardo; Arroyo Alvarez de Toledo, Marcos; Andò, Edward; Gens Solé, Antonio; Viggiani, Gioacchino (2020-11)
      Article
      Open Access
      Particle shape has a strong effect on the mechanical response of coarse soils. This has been usually observed examining specimen-scale or engineering-scale responses, which are the sum of many microscale interactions. In ...
    • Microscopic calibration of rolling friction to mimic particle shape effects in DEM 

      Rorato, Riccardo; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Andò, Edward (ITASCA Consulting Group, 2020)
      Conference report
      Restricted access - publisher's policy
      Much work has been done to characterize granular shape and to understand its influence on overall soil behavior. Thus, Wadell (Wadell 1932) introduced the concept of “sphericity” that quantifies how a particle differs from ...
    • Microscopic calibration of rolling friction to mimic particle shape effects in DEM 

      Rorato, Riccardo; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Andò, Edward (CIMNE, 2019)
      Conference report
      Open Access
      It is widely recognised that particle shape influences the mechanical response of granular materials [1-2]. Rolling resistance elasto-plastic contact models are frequently used to approximate particle shape effects in ...
    • Sphericity measures of sand grains 

      Rorato, Riccardo; Arroyo Alvarez de Toledo, Marcos; Andò, Edward; Gens Solé, Antonio (2019-05)
      Article
      Open Access
      The sphericity of a grain should measure the similitude of its shape with that of a sphere. Sphericity is a shape descriptor of long-standing interest for sedimentology. Now it has gained also interest to facilitate discrete ...