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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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 ... -
Homogenization of dentin elastic properties based on microstructure characterization, statistical back-analysis and FEM simulation
(Georgia Institute of Technology, 2017-07)The dentinal tissue is made of tubules surrounded by peri-tubular dentin (PTD), embedded in a matrix of inter-tubular dentin (ITD). Hashin and Rosen found exact stiffness bounds for hexagonal patterns of hollow fibers. But ... -
Micromechanics based discrete damage model with multiple non-smooth yield surfaces: theoretical formulation, numerical implementation and engineering applications
(2017-03)The discrete damage model presented in this paper accounts for 42 non-interacting crack microplanes directions. At the scale of the Representative Volume Element (RVE), the free enthalpy is the sum of the elastic energy ... -
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 ... -
Fracture-Induced Anisotropy of the Stress-Strain Response of Shale at Multiple Scales
(Georgia Institute of Technology, 2016)This paper investigates deformation and stiffness anisotropy induced by damage propagation in rock brittle deformation regime. Specifically, a Finite Element-based Continuum Damage Mechanics model is used to capture sample ... -
Prediction of viscous cracking and cyclic fatigue of salt polycrystals using a joint-enriched Finite Element Model
(Georgia Institute of Technology, 2016-09)We present a new Joint-enriched Finite Element Method (JFEM) to predict viscous damage and fatigue in halite polycrystals in 2D. Different visco-plastic finite elements are used to represent grains of different orientations, ... -
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 ... -
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 ... -
Simulation of mode II unconstrained fracture path formation coupled with continuum anisotropic damage propagation in shale
(Georgia Institute of Technology, 2016-06)The objective of this work is to simulate mode II multi-scale fracture propagation in shale by coupling a continuum anisotropic damage model with a Cohesive Zone Model (CZM). The Continuum Damage Mechanics – based ...
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