Browsing School of Civil and Environmental Engineering Publications and Presentations by Title
Now showing items 33-52 of 109
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A generalized equation for rheology of emulsions and suspensions of deformable particles subjected to simple shear at low Reynolds number
(Georgia Institute of Technology, 2014-11)We present analyses to provide a generalized rheological equation for suspensions and emulsions of non-Brownian particles. These multiparticle systems are subjected to a steady straining flow at low Reynolds number. We ... -
Generalized Stress Variables in Continuum Damage Mechanics
(Georgia Institute of Technology, 2014-07)“Damage” in Continuum Mechanics is an internal variable used at the scale of a Representative Elementary Volume (REV) to model the decrease of stiffness due to the nucleation and propagation of crack tips in the bulk. ... -
Heat Damaged Cement Paste Characterization Using Nonlinear Acoustic Waves
(Georgia Institute of Technology, 2013-07)This paper focuses on the experimental characterization of the elastic properties of sound and heat-damaged cement paste for different water cement ratio. The method of the nonlinear acoustic is based on the Higher Harmonic ... -
Homogenization of Cemented Soil Stiffness and Application to the Study of Arching Effects between Jet-Grouted Columns
(Georgia Institute of Technology, 2014-06)This paper presents a study of the effect of jet-grouting on soil stiffness. Several homogenization techniques are tested at the scale of a Representative Elementary Volume to determine the stiffness of a mixture made of ... -
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 ... -
Horizontal directional drilling (HDD) alignment optimization using ant colony optimization
(2020)Horizontal Directional Drilling (HDD) is a trenchless method that consists in drilling an inclined and curved bore from an entry point to an exit point. In practice, HDD is designed iteratively by trial and error, to ... -
Image processing of fabric evolution in granular salt subject to diffusive mass transfer
(Georgia Institute of Technology, 2015-05)Because of its favorable creep properties and low gas permeability, salt rock is viewed as an attractive host medium for nuclear waste disposals and natural resources storage. Under high stress and temperature conditions, ... -
Influence of Damage on Pore Size Distribution and Permeability of Rocks
(Georgia Institute of Technology, 2012-01)The model proposed in this article relates permeability to porosity measurements that can easily be performed in the laboratory. The pore size distribution (PSD) curve is updated with strains and damage. The updated ... -
Integrated Decision Support Tool (iDST) Life Cycle Costing Module for Distributed Stormwater Control Measures (SCMs)
(Georgia Institute of Technology, 2020-05-18)The life cycle costing (LCC) module for distributed stormwater control measures (SCMs) for the integrated decision support tool (i-DST) supporting analysis of green, grey, and hybrid stormwater infrastructure deployment ... -
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 ... -
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 ... -
Mechanical Behavior and Microstructure Development in Consolidation of Nominally Dry Granular Salt
(Georgia Institute of Technology, 2016-06)Uniaxial consolidation of granular salt is carried out to study the mechanical behavior and fabric development in a material that deforms by microscopic brittle and intracrystalline-plastic processes. Dry granular salt is ... -
Mechanistic Analysis of Rock Damage Anisotropy and Rotation Around Circular Cavities
(Georgia Institute of Technology, 2015-01)We used the differential stress-induced damage (DSID) model to predict anisotropic crack propagation under tensile and shear stress. The damage variable is similar to a crack density tensor. The damage function and the ... -
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 ... -
Micro-macro analysis and phenomenological modeling of salt viscous damage and application to salt caverns
(Georgia Institute of Technology, 2015)This paper aims to gain fundamental understanding of the microscopic mechanisms that control the transition between secondary and tertiary creep around salt caverns in typical geological storage conditions. We ... -
Micro-Macro Approach of Salt Viscous Fatigue under Cyclic Loading
(Georgia Institute of Technology, 2015)The objective of this work is to explain the origin of fatigue observed in salt rock subject to cyclic loading. We used a self-consistent homogenization scheme to upscale the viscoplastic and damage behavior of halite ... -
Micro-Macro Modeling Approach for the Triggering of Viscous Fatigue Damage in Halite Polycrystals under Cyclic Loading
(Georgia Institute of Technology, 2014-06)Underground cavities in salt rock formations used for Compressed Air Energy Storage (CAES) undergo cyclic loads and are subject to a fatigue phenomenon that induces a decrease of rock’s strength and stiffness. A ... -
Micro-macro Modeling of Particle Crushing Based on Branch Lengths
(Georgia Institute of Technology, 2014-02)A micro-macro model of particle crushing is proposed. Microstructure changes are tracked with the density and size distribution of branch lengths. At the scale of a representative elementary volume (REV), the free energy ... -
Micro-mechanical analysis of salt creep tests with a joint-enriched Finite Element model
(Georgia Institute of Technology, 2016-06)In this study, micro-mechanisms that govern the viscous and damage behavior of salt polycrystal during creep processes are investigated. A Finite Element model is designed with POROFIS, in which surface elements represent ...