School of Civil and Environmental Engineering Publications and Presentations
Scholarly work from the School of Civil and Environmental Engineering (CEE)
All materials in SMARTech are protected under U.S. Copyright Law and all rights are reserved. Such materials may be used, quoted or reproduced for educational purposes only with prior permission, provided proper attribution is given. Any redistribution, reproduction or use of the materials, in whole or in part, is prohibited without prior permission of the author.
Recent Submissions
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Fluid driven transition from damage to fracture in anisotropic porous media - a multiscale XFEM approach
(2019)In this paper, a numerical method is proposed to simulate multiscale fracture propagation driven by fluid injection in transversely isotropic porous media. Intrinsic anisotropy is accounted for at the continuum scale, by ... -
Three Considerations for Modeling Natural Gas System Methane Emissions in Life Cycle Assessment
(Elsevier, 2019-03-13)Natural gas is a fossil fuel accounting for about 30% of US primary energy consumption. Climate change is one of the primary environmental issues associated with natural gas use: natural gas combustion releases carbon ... -
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 ... -
Simulation of salt cavity healing based on a micro-macro model of pressure-solution
(Geological Society, United Kingdom, 2019-01)CO₂ storage in salt rock is simulated with the Finite Element Method (FEM), assuming constant gas pressure. The initial state is determined by simulating cavity excavation with a Continuum Damage Mechanics (CDM) model. A ... -
An Isotropic Self-Consistent Homogenization Scheme For Chemo-Mechanical Healing Driven By Pressure Solution In Halite
(Georgia Institute of TechnologyElsevier, 2018)Mechanical healing is the process by which a damaged material recovers mechanical stiffness and strength. Pressure solution is a very effective healing mechanism, common in crystalline media. Chemical reactions initiate ... -
Anisotropic nonlocal damage model for materials with intrinsic transverse isotropy
(2018-01)This paper presents the theoretical formulation and numerical implementation of an anisotropic damage model for materials with intrinsic transverse isotropy. Crack initiation and propagation are modeled by phenomenological ... -
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 ... -
Self-consistent micromechanical approach for damage accommodation in rock-like polycrystalline materials
(Georgia Institute of Technology, 2017)In quasi-brittle polycrystalline materials, damage by cracking or cleavage dominates plastic and viscous deformation. This paper proposes a micromechanical model for rock-like materials, incorporating the elastic-damage ... -
Nonlocal enrichment of a micromechanical damage model with tensile softening: advantages and limitations
(Georgia Institute of Technology, 2017-09)Upon crack propagation, brittle geomaterials such as concrete and rock exhibit a nonlinear stress/strain behavior, damage induced stiffness anisotropy, loading path dependent strain softening and hardening, unilateral ... -
An Investigation of Methods for Imputing Attitudes from One Sample to Another
(2017-06)Often in practice, researchers have a (“target”) dataset that is desirable in many ways, but is missing some key variables, or “knowledge”, that would greatly enrich the value of the data for investigating questions of ... -
Numerical Study of Thermo-Mechanical Effects on the Viscous Damage Behavior of Rock Salt Caverns
(Georgia Institute of Technology, 2017-06)Underground cavities in rock salt have received increased attention for the storage of oil, gas, and compressed air energy. In this study, the transition between secondary and tertiary creep in salt is determined by a ... -
Microcrack Network Development in Salt-Rock During Cyclic Loading at Low Confining Pressure
(Georgia Institute of Technology, 2017-06)Triaxial compression tests of synthetic salt-rock are conducted to investigate microfracture development in a semibrittle polycrystalline aggregate. The salt-rock is produced from uniaxial consolidation of granular halite ... -
Modeling of Tensile and Compressive Damage in Layered Sedimentary Rock: A Direction Dependent Non-Local Model
(Georgia Institute of Technology, 2017-06)This paper presents the theoretical formulation and numerical implementation of an anisotropic damage model for materials with intrinsic transverse isotropy, e.g. sedimentary rocks with a bedding plane. The direction ... -
Non-Local Micromechanical Anisotropic Damage Modeling Of Quasi-Brittle Materials: Formulation And Implementation
(Georgia Institute of Technology, 2017-06)A nonlocal anisotropic damage model is proposed for quasi-brittle materials, such as concrete and rock. The local anisotropic damage model is formulated by combining a free energy derived from micromechanics with ... -
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 ... -
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 ... -
A Method to Estimate the Energy Distribution During the Confined Comminution of Granular Materials
(Georgia Institute of Technology, 2017-06)During the confined comminution of granular materials, the work input is transformed into elastic energy stored in the grains, breakage energy used to generate new surfaces, energy dissipated by friction between grains ... -
Monthly Maps of SMAP L2 Version 4 Soil Moisture Retrievals over Contiguous United States in 2016: Data Sample Size Under Various Quality Flags
(Georgia Institute of Technology, 2017-05-07)This document presents the data sample size of the SMAP L2 Version 4 soil moisture retrievals for each month during 2016 and the percentages of the soil moisture data within some quality control limits defined by NASA. The ... -
The Risks of Hydraulic Fracturing and the Responsibilities of Engineers
(2017-03)One third of U.S. natural gas is extracted by injecting fluid at high pressure into shale formations, a process associated with a number of possible hazards and risks that have become the subject of intense public controversy. ... -
Analysis of microstructure, deformation and permeability of salt/sand mixtures during creep
(Georgia Institute of Technology, 2017-07)The impact of impurities on salt healing properties is studied through creep tests performed on brine saturated granular salt with various quartz contents. Quartz grains act as shields that reduce dissolution at salt grain ...
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