Browsing School of Civil and Environmental Engineering Publications and Presentations by Title
Now showing items 9-28 of 108
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Bayesian Paradigm to Assess Rock Compression Damage Models
(Georgia Institute of Technology, 2014-03)Energy extraction and waste storage in geological formations raise interest in developing systematic and reliable calibration methods to assess performance of rock models. A methodology is proposed to improve damage ... -
Bio-Inspired Fluid Extraction Model for Reservoir Rocks
(Georgia Institute of Technology, 2017-06)Biological and engineering flow systems maximize their efficiency by following the path of minimum energy over the domain they are embedded in. This fact motivates the present research, since industrial fluid extraction ... -
Bio-Inspired Porous Network Topology for Optimal Injection and Withdrawal Processes in Soils
(Georgia Institute of Technology, 2014-02)Bronchi, arteries and veins, tree branches and roots, exhibit a fractal topology, i.e. networks formed by channels that successively split in to smaller channels. A thorough literature review shows that self-similar ... -
Book of Abstracts Report from: International Workshop on Education of Future Geotechnical Engineers in Response to Emerging Multi-scale Soil-Environment Problems
(Georgia Institute of Technology, 2014-09)Book of abstracts compiled by over 40 participants, as part of a workshop organized by Principal Investigators Chloé Arson and Giuseppe Buscarnera, under NSF Grant CMMI-1443990. The workshop addressed the new skill set ... -
Breakage Mechanics Modeling of the Brittle-ductile Transition in Granular Materials
(Georgia Institute of Technology, 2016-06)During comminution, several energy dissipation processes operate simultaneously, including plastic work due to internal friction, fracture energy release due to particle breakage, and plastic work due to the rearrangement ... -
Chemo-Mechanical Damage and Healing of Granular Salt: Micro-macro modeling
(Georgia Institute of Technology, 2016-06)A micro-macro chemo-mechanical model of damage and healing is proposed to predict the evolution of salt stiffness and deformation upon micro-crack propagation, opening, closure and rebonding, which is the result of pressure ... -
Chemo-mechanical evolution of pore space in carbonate microstructures upon dissolution: linking pore geometry to bulk elasticity
(Georgia Institute of Technology, 2015-09)One of the challenges faced today in a variety of geophysical applications is the need to understand the changes of elastic properties due to time-variant chemo-mechanical processes. The objective of this work is to model ... -
Conventional hydroelectricity and the future of energy: Linking national T inventory of dams and energy information administration data to facilitate analysis of hydroelectricity
(Elsevier, 2020-01)Within the energy community, conventional dam and reservoir-based hydroelectricity is often viewed as a low- cost, immediately available zero-carbon resource that could facilitate more intermittent renewable electricity ... -
Damage and healing model of stiffness and permeability for salt rock: microstructure imaging, fabric processes and continuum mechanics
(Georgia Institute of Technology, 2016-06)In this study, we proposed a fabric-enriched Continuum Damage Mechanics model to investigate the coupled influence of damage and healing on the mechanical and transport properties of salt rock. In order to infer the form ... -
DEM analysis on the role of aggregates on concrete strength
(Georgia Institute of Technology, 2019-10-02)This study aims to understand the micro-mechanisms that drive fracture propagation in concrete and to assess the roles of the strength of aggregates and of the aggregate/mortar interfacial transition zone (ITZ) on concrete ... -
DEM modelling of sequential fragmentation of zeolite granules under oedometric compression based on XCT observations
(Elsevier, 2019)The objective of our research is to define a new Discrete Element Method (DEM) that can describe the processes involved in particle breakage and the resulting macroscopic behaviour of the particulate assembly, by directly ... -
Discrete Element modeling and analysis of shielding effects during the crushing of a grain
(Georgia Institute of Technology, 2015-07)The potential for a particle to crush under one-dimensional compression is critically dependent on the coordination number of that particle. Neighboring particles decrease deviatoric forces at contacts, which reduces ... -
Discrete Element Modeling of shielding and size effects during single particle crushing
(Georgia Institute of Technology, 2016-04)In granular assemblies such as soil, ballast, cementitious aggregates, food and medical products, particle fragmentation and crushing alter material properties. The goal of this research work is to better understand the ... -
Discrete Equivalent Wing Crack Based Damage Model for Brittle Solids
(Georgia Institute of Technology, 2016)The Discrete Equivalent Wing Crack Damage (DEWCD) model formulated in this paper couples micro-mechanics and Continuum Damage Mechanics (CDM) principles. At the scale of the Representative Elementary Volume (REV), damage ... -
Energy Dissipation During Mode I Fracture Propagation in Shale: Comparison between a Continuum Damage Model, a Cohesive Zone Model and the Extended Finite Element Method
(Georgia Institute of Technology, 2015-05)We modeled mode I fracture in shale with an equivalent damage zone (CDM), a cohesive zone (CZM) and discontinuous enrichment functions (XFEM). In the Differential Stress Induced Damage model (DSID model) used in the continuum ... -
Energy distribution during the quasi-static confined comminution of granular materials
(Georgia Institute of Technology, 2017-12)A method is proposed to calculate the distribution of energy during the quasi-static confined comminution of particulate assemblies. The work input, calculated by integrating the load-displacement curve, is written as the ... -
Experimental Characterization of Microstructure Development for Calculating Fabric and Stiffness Tensors in Salt Rock
(Georgia Institute of Technology, 2017-06)Uniaxial consolidation tests were conducted on reagent-grade granular salt in dry conditions at 150 C. 2Dmicroscopic images, parallel to the axis of consolidation, were obtained at several stages of progressive consolidation ... -
Fabric evolution and crack propagation in salt during consolidation and cyclic compression tests
(2020)It is of great interest to describe and quantify the evolution of microstructure for a better understanding of rock deformation processes. In this study, 2D microstructure images of salt rock are analyzed at several stages ... -
Fabric-based modeling of thermo-mechanical damage and healing around salt caverns
(Georgia Institute of Technology, 2015-05)Geotechnical reservoirs and repositories in salt such as nuclear waste disposals, geothermal systems, and compressed air energy storage (CAES) are usually subject to complex thermo-mechanical conditions, leading to crack ... -
Fabric-enriched Modeling of Anisotropic Healing induced by Diffusion in Granular Salt
(Georgia Institute of Technology, 2015-07)This study aims to model anisotropic damage (i.e. increase of porosity and loss of stiffness) and healing (i.e. recovery of stiffness) in salt rock subject to microcrack initiation, propagation, and rebonding. We introduce ...