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Showing 1 to 20 of 123 for “"Discrete element method"”.
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Discrete element method simulation of wheat bulk density
… and wheat bulk density was simulated using the discrete element method (DEM). The objectives of this research were to: (1) experimentally investigate the influence of kernel shape and size on packing ratio and compressibility of wheat, (2) determine the influence of particle shape and contact …
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Parametric Analysis of Particle Spreading with Discrete Element Method
… platform is vital in most additive manufacturing methods, including direct laser sintering. Several processing parameters such as particle size, inter-particle friction, blade speed, and blade gap size affect the spreading process and, therefore, the final product quality. The objective of this …
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DEM [Discrete Element Method] simulations of drained and undrained behaviour
This thesis reports the results of DEM (Discrete Element Method) simulations of the behaviour of granular material for axisymmetric compression and plane strain deformation under both drained and undrained conditions. The aim is to study the behaviour of saturated granular material using DEM and …
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Resolution of grain scale interactions using the Discrete Element Method
… investigating granular systems is the Discrete Element Method (DEM). Nearly all implementations of the DEM, however, use spheres to represent particles despite mounting evidence showing that shape at multiple scales (sphericity, angularity, and friction) plays a role in granular …
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Seismic vulnerability of historical structures with the discrete element method
… explored the potentials and limitations of the Discrete Element Method for this type of problem, a new joint model for the quasistatic analysis of block structures is proposed. It accounts for (a) the non coplanarity of the contact surfaces, and (b) friction softening. The new model allowed a …
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Discrete Element Method (DEM) Contact Models Applied to Pavement Simulation
Pavement is usually composed of aggregate, asphalt binder, and air voids; rigid pavement is built with hydraulic cement concrete; reinforced pavement contains steel. With these wide ranges of materials, different mechanical behaviors need to be defined in the pavement simulation. But so far, there …
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Discrete element method simulation of wear due to soil-tool interaction
This study considered using a relatively new method to study soil-tool wear which could drastically reduce the time and associated costs of traditional wear studies. The goal was to utilize discrete element method (DEM) simulations to recreate the results of a circular soil bin test in order to …
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Numerical simulation of selected geologic processes based on Discrete Element Method
… modeling of geologic processes based on Discrete Element Method (DEM), including modeling of pull-apart basin development based on Particle Flow Code (PFC) and simulation of deformation and earthquake potential of Ordos Block (China) under present tectonic stress regime based on Universal …
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Acceleration of the discrete element method on a reconfigurable co-processor
… but one of the best and most important is the Discrete Element Method (DEM). The DEM was first developed during the 70’s, but its widespread use has been hampered by its extremely computationally demanding nature. The DEM can be run on a parallel computer by farming out different sub-domains …
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Discrete element method based scale-up model for material synthesis using ball milling
… of experimental and modeling efforts. Initially, Discrete Element Model (DEM) is used to describe energy transfer from milling tools to the milled powder for shaker, planetary, and attritor mills. The rolling and static friction coefficients are determined experimentally. Computations predict a …
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Investigation of unstable failure in underground coal mining using the discrete element method
… opening. This thesis demonstrates the use of the discrete element method to simulate stable and unstable modes of compressive failure of a western U.S. coal. Two discrete element models are evaluated for their ability to simulate unstable and stable compressive failure using the discrete element …
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A study of impact breakage of single rock specimen using discrete element method
… techniques such as the Bonded Particle Model-Discrete Element Method (BPMDEM) have been developed as a means of investigating in isolation, the effects of different factors on ore breakage behaviour under closely controlled breakage conditions using synthetic rock specimens. This study …
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Parallel implementation and application of particle scale heat transfer in the Discrete Element Method
… systems is challenging. Use of a high fidelity Discrete Element Method (DEM) for particle scale simulations coupled to Computational Fluid Dynamics (CFD) requires large simulation times and limits application to small particulate systems. The overall goal of this research is to develop and …
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Discrete element method modelling of particle breakage and wear in High Pressure Grinding Rolls
… to develop a comprehensive model based on the discrete element method (DEM) to investigate the grinding process of HPGR and understand the underlying mechanisms. A laboratory-scale geometrical model of the HPGR mill was developed and the dynamic response of the rolls in the mill was simulated. …
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Numerical Simulations of Spread Foundations Supported on Stone Columns Using the Discrete Element Method
… variation in the performance of these existing methods when compared with full-scale experimental results. For very weak cohesive soils (i.e., undrained shear strength less than 15 kPa), the use of conventional stone columns becomes restricted because of the insufficient confinement that these …
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Train-track discrete-element-method model for simulating ballasted track dynamics: coupling and validation
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-02-04 without embargo terms
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Modelizado y optimización del proceso de compresión de aditivos alimentarios mediante DEM: (Discrete Element Method)
… alimentarios. Para ello, se emplea el Método de Elementos Discretos (Discrete Element Method, DEM), el cual permite estudiar el comportamiento de los aditivos alimentarios, considerados como partículas, ante diferentes solicitaciones. Con el programa EDEM® Simulation, de la empresa DEM Solutions, …
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Modelling and optimization of green pellets classification on roller screens using the discrete element method
… of green pellets in roller screens using the Discrete Element Method. For this, the individual and bulk properties of the green pellets are determined in physical tests for calibration and validation by comparison with industrial data of contact models that reproduce with verisimilitude the …
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Simulation of High-velocity Penetration for Rigid Projectile into Plain Concrete Target using Discrete Element Method
… recent years. This study presents a study on the Discrete Element Method (DEM) simulation of plain concrete target's behavior under high-velocity penetration of rigid projectile. In this thesis, different types of research works including empirical, analytical and numerical methods in penetration …
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Investigation of Toughening Mechanisms in the Fracture of Asphalt Concrete Using the Clustered Discrete Element Method
… continuous motion of new surfaces. A clustered discrete element method (DEM) is employed as a means to investigate fracture mechanisms in asphalt concrete at low temperatures. A bilinear cohesive softening model is implemented into the DEM framework to enable simulation of crack initiation and …
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