Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 62 for “"Granular material"”.
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Neural Network-Based Constitutive Modeling of Granular Material
… used for the autoprogressive training of the NN material models using the results of drained triaxial compression tests with end friction.
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The Behavior Of A Macroscopic Granular Material In Vortex Flow
A granular material is defined as a collection of discrete particles such as powder and grain. Granular materials display a large number of complex behaviors. In this project, the behavior of macroscopic granular materials under tornado-like vortex airflow, with varying airflow velocity, was …
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DEM [Discrete Element Method] simulations of drained and undrained behaviour
… 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 the objectives of this thesis are: • to explore …
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Estudo do comportamento de lastros de materiais granulares sobre estacas com capitéis através de modelos reduzidos
… oil tanks, warehouses and storage yards made of granular material placed over piles with small circular caps. The importance of the following parameters has been evaluated with the aid of a small scale model: critical thickness of the base in relation to pile spacing and cap diameter, density and …
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Granular sloshing absorbers for vibration control
… a novel passive damping device, that uses a granular material sloshing in a rotating cylindrical container as the energy sink. Tuning of a granular sloshing absorber is shown to be effective using a laboratory prototype, increasing the inherent damping of the structure by two orders of …
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Mechanistic-Empirical Evaluation of the Mn/ROAD Low-Volume Road Test Sections
… FWD test data were used to study the effect of granular material quality on pavement performance and deflection response. The results from the rapid shear tests and permanent deformation tests show that the rutting potential of a granular material can be characterized from rapid shear test at …
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Seismic analysis of inclined shallow granular deposits
… to investigate the mechanical response of two granular material (Hostun and Toyoura sand) in cyclic/dynamic conditions. In this paper some relationships between permanent displacement, evaluated by means of the code VIBRAZIONE and the Newmark method, and earthquake parameters, such as critical …
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Characterization of Emulsion Aggregate Mixtures
… are adequately characterized as an improved granular material.
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DEM Study of a Single Stone Column in a Clayey Stratum
… level. The shear strength of the coarse-grained material comprising an aggregate pier is defined by its internal friction angle. There are several factors affecting the friction angle of the granular material that include: confining stress, particle shape, relative density and particle …
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Θραύση λιθορρίπτων φραγμάτων λόγω υπερχείλισης: [υπό] Νικολάου Κ. Σφακιανάκη
… OF A DAM EMBANKMENT COMPOSEDOF NON COHESIVE, GRANULAR MATERIAL. THIS MODEL IS BASED ON THE BED LOAD FORMULA OF SHIELDS, ADAPTED TO THIS PHENOMENON. THE CONDITIONS OF SIMILITUDE ARE ALSOEXAMINED.
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Comparing Layer Types for the Use of MEPDG for FDR Design
… is a combination of several different layers of material pulverized, mixed, stabilized and re-compacted, it does not fit neatly into any of these predetermined types of materials considered by the Mechanistic Empirical Design Guide (MEPDG). Current practice is to treat FDR as an unbound granular …
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Mesoscale Forces and Grain Motion in Granular Media Exhibiting Stick-Slip Dynamics: Effects of Friction and Grain Shape
<p>An important challenge in the physics of granular materials is understanding how the properties of single grains, such as grain shape and friction, influence the mechanical strength and dynamical response of the bulk granular material. While spherical grains are often used to study granular …
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Experimental characterization of the Barree and Conway (2004) single-phase non-Darcy flow model in various hydraulic fracturing sands
… through fracturing sand and irregular shaped materials on the parameters of the Barree and Conway (2004) non-Darcy single-phase flow model. It also investigates the existence of the minimum permeability concept. Several modifications were made to the laboratory data acquisition to ensure the …
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Towards realistic interactive sand : a GPU-based framework
… These terrains often contain large quantities of granular material, including sand, soil, rubble, and gravel. Allowing other environmental elements, such as trees or bodies of water, as well as players, to interact naturally and realistically with sand, is an important milestone for achieving …
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Mechanical characterization of jammable granular systems
The mode by which a granular material can transition between fluid-like and solid-like states has been often referred to as jamming. The use of this property (via vacuum pressure) for engineering applications has only recently been explored. Several possible applications are presented. However, …
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Reinforcement of pavement subgrade using granular fill and a geosynthetic layer
… reinforcement of a soft clay overlain by granular material.
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Soil stabilization properties of flexible intruders
… as the plant roots. To investigate how flexible materials can stabilize soil, we use photoelastic particles to analyze the forces within a system when a flexible intruder is introduced to the system. We report on the increase in system forces as an effect of the flexible intruder and compare it …
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Thermomechanical modelling of powder compaction and sintering
… estimate to the compaction curve of a granular material, which compares well with other models and finite element simulations. The parameters of the thermomechanical model are determined on the basis of available data and dilatometer experiments. Finally, after computer implementation, …
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