Now showing items 1-6 of 6

    • A fracture-based discrete model for simulating creep in quartz sands 

      Lei, Jiangtao; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Zhang, Ningning (2024-04)
      Article
      Restricted access - publisher's policy
      Creep of granular soils is frequently accompanied by grain breakage. Stress corrosion driven grain breakage offers a micromechanically based explanation for granular creep. This study incorporates that concept into a new ...
    • A time-to-facture DEM model for simulating creep in rough crushable sand 

      Lei, Jiangtao; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Zhang, Ningning (2023)
      Conference lecture
      Open Access
      A contact model able to capture creep of crushable sands within a discrete element method (DEM) framework is presented. Time dependency is established through stress-corrosion induced grain fracture. This is grafted onto ...
    • Discrete modelling of stress relaxation in crushable sands based on fracture theory 

      Lei, Jiangtao; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Zhang, Ningning (CRC Press, 2024)
      Conference report
      Open Access
      Stress relaxation of quartz sand is simulated using a recently proposed physically based time-to-fracture discrete element method (DEM) framework. The relaxation of stress on sands under high confining pressure ...
    • Discrete-element based simulation of CPT and SPT on a volcanic sand 

      Lei, Jiangtao; Zhang, Ningning; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem (Elsevier, 2024-06)
      Article
      Restricted access - publisher's policy
      In situ soil characterization often involves penetration tests. The response to both static and dynamic penetration in volcanic sands is known to be controlled by particle crushing, obscuring the effect of density and ...
    • 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)
      Conference report
      Open Access
      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, ...
    • 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)
      Conference report
      Open Access
      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 ...