Browsing by Author "Arroyo Alvarez de Toledo, Marcos"
Now showing items 1-20 of 156
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3D DEM simulations of CPT in sand
(2012)
Conference report
Restricted access - publisher's policyThe paper contains an overview of the results obtained in a research project exploring the ability of 3D DEM models to reproduce cone penetration in sands. The sand whose behaviour is mimicked by the discrete material ... -
A contact model for rough crushable sand
(2021-06)
Article
Open AccessSand roughness is now accessible to measurement. Incorporating this parameter into sand models using the discrete element method (DEM) is known to improve bulk small strain response. In this work we explore the effect on ... -
A fracture-based discrete model for simulating creep in quartz sands
(2024-04)
Article
Restricted access - publisher's policyCreep 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 new approach to evaluate the soil disturbance due to tube sampling
(2022)
Conference report
Restricted access - publisher's policyDisturbance of specimens recovered by tube sampling from boreholes is an enduring relevant problem in geotechnical engineering. Practice has evolved slowly in this area, partly because the main research method applied, ... -
A new efficient strategy to simulate particle breakage in DEM analyses
(2014)
Conference report
Restricted access - publisher's policyThe 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
(Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
Conference report
Open AccessThe 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 nonlocal elasto-plastic model for structured soils at large strains for the particle finite element method
(Springer, 2021)
Part of book or chapter of book
Restricted access - publisher's policyThis work presents a robust and mesh-independent implementation of an elasto-plastic constitutive model at large strains, appropriate for structured soils, into a Particle Finite Element code specially developed for ... -
A numerical investigation of the incremental behavior of crushable granular soils
(2016-09)
Article
Open AccessThe 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 practical method for suction estimation in unsaturated soil testing
(CRC Press, 2013)
Conference report
Restricted access - publisher's policyThis research presents an alternative methodology to estimate suction in triaxial tests carried out under constant water content. A preliminary determination of the retention curve is proposed using two complementary ... -
A pressuremeter-based evaluation of structure in London Clay using a kinematic hardening constitutive model
(Springer, 2020-08)
Article
Open AccessThe self-boring pressuremeter (SBP) test was designed to measure in situ engineering properties of the ground with a relatively small amount of disturbance. The properties that may be inferred from the test depend on the ... -
A probabilistic Bayesian methodology for the strain-rate correction of dynamic CPTu data
(2023-05)
Article
Open AccessDynamic Cone Penetration Tests (CPTu) profile offshore sediments by impact penetration. To exploit their results in full the measured data is converted to obtain a quasi-static equivalent profile. Dynamic CPTu conversion ... -
A relation between undrained CPTu results and the state parameter for liquefiable soils
(Canadian Science Publishing, 2023-11)
Article
Open AccessThis paper presents a new interpretation procedure to estimate the initial state parameter from cone penetration testing (CPTu) in undrained conditions based on the results from a comprehensive set of numerical simulations ... -
A soft-rock model for cement-improved clays
(IOS Press, 2011)
Conference report
Restricted access - publisher's policy -
A stable mesh-independent approach for numerical modelling of structured soils at large strains
(Elsevier, 2019-12)
Article
Open AccessWe 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 ... -
A structured constitutive model for simulating the behaviour of an overconsolidated bonded clay
(CIMNE, 2011)
Conference report
Open AccessThe paper presents some improvements in the formulation of a kinematic hardening constitutive soil model incorporating structure initially proposed for soft clays. For the modelling of overconsolidated bonded clay the ... -
A structured constitutive model for simulating the behaviour of an overconsolidated bonded clay
(Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2011)
Conference report
Open AccessThe paper presents some improvements in the formulation of a kinematic hardening constitutive soil model incorporating structure initially proposed for soft clays. For the modelling of overconsolidated bonded clay the ... -
A subloading surface clay and sand model
(2023)
Conference report
Open AccessThe mechanical response of natural soils is characterized by a narrow elastic domain, a smooth transition between elastic to elasto-plastic regime, and hysteretic behaviour during cyclic loading. These realistic features ... -
A submersible drill rig for coring soils and rocks
(2012)
Conference report
Restricted access - publisher's policyThe paper describes the design and initial field-testing of a remotely operated submersible drill rig able to obtain continuous cores of soil and/or rock up to 6 m long. The rig mast angle is hydraulically actuated covering ... -
A time-to-facture DEM model for simulating creep in rough crushable sand
(2023)
Conference lecture
Open AccessA 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 ... -
An Approach to enhance efficiency of DEM modelling of soils with crushable grains
(Thomas Telford, 2015-02)
Article
Open AccessIn 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 ...
