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Showing 1 to 15 of 15 for “"discrete element model"”.
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Powder Bed Surface Quality and Particle Size Distribution for Metal Additive Manufacturing and Comparison with Discrete Element Model
<p>Metal additive manufacturing (AM) can produce complex parts that were once considered impossible or too costly to fabricate using conventional machining techniques, making AM machines an exceptional tool for rapid prototyping, one-off parts, and labor-intensive geometries. Due to the growing …
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Application of a discrete element model to the analysis of granular soil recovery in an offshore tubular vibrocore
… execution of both physical testing and numerical modelling, this study aimed to a) Develop a calibrated 30 discrete element model of a given vibrocore-soil system, and b) Investigate the soil mechanics phenomena influencing the disturbance and recovery of vibrocore soil samples.
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Development and use of a discrete element model for simulating the bulk strand flow in a rotary drum blender
… This work focused on development and use of a discrete element model (DEM) for simulating strand flow in a rotary drum blender using the EDEM software package. EDEM required the input of three material and three interaction properties. Development of the model involved creating the simulated …
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Discrete Element Modeling of Railway Ballast for Studying Railroad Tamping Operation
The development of Discrete Element Model (DEM) of railway ballast for the purpose of studying the behavior of ballast particles during tamping is addressed in a simulation study, with the goal of optimizing the railroad tamping operation. A comprehensive literature review of applicability of DEM …
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Discrete Element Modeling of Granular Flows in Vibrationally-fluidized Beds
… main objective of the project was to develop a model for the motion of granular media under vibration in a tub vibrator. For such a system, it was decided that a discrete element method (DEM) was the most appropriate tool to model bulk velocity and circulation of media. In the first phase of the …
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DESIGNING MECHANICAL METAMATERIALS FOR INDUSTRIAL APPLICATIONS
… industrial implementation. The work employs a discrete element model (DEM) for efficient simulation of mechanical behaviors while maintaining essential accuracy through parameterization with finite element analysis. A Monte Carlo optimization approach combined with the Fast Inertial Relaxation …
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Preferential mode of gas invasion in sediments : grain-scale model of coupled multiphase fluid flow and sediment mechanics
We present a discrete element model for simulating, at the grain scale, gas migration in brine-saturated deformable media. We rigorously account for the presence of two fluids in the pore space by incorporating forces on grains due to pore fluid pressures, and surface tension between fluids. This …
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Jamming transition and emergence of fracturing in wet granular media
… We develop a hydromechanical computational model, coupling a "moving capacitor" dynamic network model of two-phase flow at the pore scale with a discrete element model of grain mechanics. We simulate the slow injection of a less viscous fluid into a frictional granular pack initially …
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Micromechanics of Granular Media: A Fundamental Study of Interphase Systems
… be measured in the laboratory. A two dimensional discrete element model of a general interphase system was developed and validated against laboratory data. Numerical experiments are conducted with varying soil to inclusion relative geometry. A new micromechanics-based approach, which utilizes …
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Discrete Element Modeling of Railway Ballast for Studying Railroad Tamping Operation
… operation is studied by developing a simulation model using the Discrete Element Model (DEM), with the aim of optimizing the railroad tamping operation. A comprehensive literature review is presented showcasing the applicability of DEM techniques in modeling ballast behavior and its feasibility …
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Investigation on the mechanisms of block cracking in asphalt pavements
… thesis, a three-dimensional analytical elastic model of a two-layer pavement system subjected to constant thermal stresses, a two-dimensional discrete element viscoelastic and heterogeneous micromechanical model, and a three-dimensional discrete element viscoelastic and inhomogeneous …
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Discrete element method based scale-up model for material synthesis using ball milling
… in various areas. In this work, a scale-up model for describing this ball milling process is developed. The thesis is a combination of experimental and modeling efforts. Initially, Discrete Element Model (DEM) is used to describe energy transfer from milling tools to the milled powder for …
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Mechanisms of fracture complexity and topology of fracture systems induced by hydraulic fracturing
… induced fracture systems show the necessity of modeling fracture complexity for improving completion design and interpreting drained reservoir volume (DRV). Thus, this work explains the mechanisms of HF-NF interaction and provides a physics-based method to infer SRV. First, fracture complexity …
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Characterisation and Evaluation of Thermally Treated Recycled Glass for Mass Finishing and Superfinishing Processes
… properties is improved. A combined Finite Element Analysis FEA and optimization algorithm has been developed using various indentation processes to determine the mechanical properties of a wide range of materials, using target FE indentation curves which were then extended to actual glass …
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Seismic assessment and strengthening of monumental masonry structures, with a particular focus on churches [Valutazione della vulnerabilità sismica e strategie di miglioramento per strutture monumentali in muratura, con particolare attenzione alle chiese]
… irregolare, delle deboli connessioni tra i macro-elementi e della natura fragile dei materiali. Tali caratteristiche determinano una frequente suscettibilità all’attivazione di meccanismi locali fuori piano (Out-of-Plane, OOP), piuttosto che a un comportamento scatolare globale della struttura. …