Browsing by Author "Ciantia, Matteo Oryem"
Now showing items 21-40 of 46
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G-PFEM: an open access numerical tool for the simulation of spudcan penetration in clays
(2022)
Conference report
Restricted access - publisher's policyPenetration depth of Spudcan foundations for offshore mobile Jack-up rigs is typically predicted by considering a wished-in-place foundation at different depths and following traditional bearing capacity approaches. However, ... -
Geotechnical particle finite element method for modeling of soil-structure interaction under large deformation conditions
(Science Press, 2022-06)
Article
Open AccessThe possibilities of the particle finite element method (PFEM) for modeling geotechnical problems are increasingly evident. PFEM is a numerical approach to solve large displacement and large strain continuum problems that ... -
Grading evolution and critical state in a discrete numerical model of Fontainebleau sand
(Thomas Telford, 2019-01)
Article
Open AccessGranular 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 ... -
Grain roughness effect on the critical state line of crushable sands
(University of Dundee, 2021)
Conference report
Open AccessA 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
(EDP Sciences, 2019)
Conference report
Open AccessThe 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
(2018-08)
Article
Open AccessA 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
(ITASCA Consulting Group, 2020)
Conference report
Restricted access - publisher's policyOne 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
(2017)
Conference report
Restricted access - publisher's policyThe 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
(International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2017)
Conference report
Restricted access - publisher's policyMunicipal 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
(Springer, 2019-10)
Article
Open AccessIn 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
(International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2019)
Conference report
Open AccessThe 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
(2020-09)
Article
Open AccessThis 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
(CRC Press Taylor & Francis Group, 2014)
Conference report
Restricted access - publisher's policyThe 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
(EDP Sciences, 2017)
Conference report
Open AccessIn 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
(International Centre for Numerical Methods in Engineering (CIMNE), 2021)
Conference report
Open AccessChalk 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
(CIMNE, 2015)
Conference report
Open AccessThe 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
(2016-03)
Article
Open AccessUsing 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
(2012-09)
Article
Restricted access - publisher's policyEngineering 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
(CIMNE, 2017)
Conference report
Open AccessThe 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
(2017)
Conference report
Open AccessThe 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 ...
