ORCID Profile
0000-0001-7013-319X
Current Organisation
University of Western Australia
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Resource geoscience | Stochastic Analysis and Modelling | Mineralogy and crystallography | Civil Geotechnical Engineering | Geology | Exploration geochemistry | Civil Engineering not elsewhere classified | Resources Engineering and Extractive Metallurgy | Mining Engineering | Numerical Modelling and Mechanical Characterisation | Maritime Engineering | Ocean Engineering | Materials Engineering not elsewhere classified | Structural Geology | Geology
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in Engineering | Industrial Energy Conservation and Efficiency | Application Tools and System Utilities | Expanding Knowledge in the Earth Sciences | Mining and Extraction of Precious (Noble) Metal Ores |
Related Links
Publications
Microfluidic study of sustainable gold leaching using glycine solution
Publisher: Elsevier BV
Date: 05-2019
A computational procedure for the prediction of settlement in granular materials under cyclic loading
Publisher: Elsevier BV
Date: 12-2007
Development of a High Strength Geopolymer by Novel Solar Curing
Publisher: Elsevier BV
Date: 10-2017
Innovative AI-based multi-objective mixture design optimisation of CPB considering properties of tailings and cement
Publisher: Informa UK Limited
Date: 28-12-2023
Ultrathin two-dimensional layered metal hydroxides: an emerging platform for advanced catalysis, energy conversion and storage
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CS00343E
Abstract: The unique properties of graphene are triggering a great deal of attention toward the family of ultrathin two-dimensional (2D) structures.
Sustainable geopolymer using lithium concentrate residues
Publisher: Elsevier BV
Date: 12-2019
Curing Conditions of Alkali-Activated Fly Ash and Slag Mortar
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2020
Qualitative and quantitative study to assess the use of rammed earth construction technology in Perth and the south-west of Western Australia
Publisher: Elsevier BV
Date: 03-2023
Coupling and damping effects on the dynamics of submerged expanded tubes in borehole wells
Publisher: Sultan Qaboos University
Date: 06-2013
DOI: 10.24200/TJER.VOL10ISS1PP11-24
Abstract: Hydraulic expansion of submerged tubes is accomplished by propelling a mandrel through it using differential pressure. This process deforms the tube beyond its elastic limit. Toward the end of the expansion process, the mandrel pops out of the tube resulting in displacement, stress, and pressure waves propagating through the system. A mathematical model has been developed to describe the dynamics of the tube-fluid system due to the pop-out phenomenon. The model takes into consideration the coupling effect between fluids and the structure, as well as the inherent system d ing of its response. An analytical solution describing the wave propagation in the tube-fluid system was obtained. The model identified the potential failure locations and showed that the inherent system d ing reduced the chances of failure but could not eliminate it completely. In addition, it showed that the coupling effect was more prominent in the tube as compared to the outer and inner fluids. Furthermore, a sensitivity analysis was conducted in order to investigate the effect of the geometrical and material properties on the response. The sensitivity analysis showed that the coupling effect vanished with the increase in tube stiffness and reached an asymptotic value with an increase in formation stiffness.
Entropic Bounds for Multi-Scale and Multi-Physics Coupling in Earth Sciences
Publisher: Springer Berlin Heidelberg
Date: 2014
Vanadium flow batteries at variable flow rates
Publisher: Elsevier BV
Date: 2022
Coupled Stress and Pressure Waves Propagation in an Elastic Solid Tube Submerged in Fluids
Publisher: ASME International
Date: 17-03-2006
DOI: 10.1115/1.2358139
Abstract: The present paper studies the effect of mandrel pop out on the dynamics of a solid tubular submerged in fluids of a typical vertical wellbore. A mathematical model describing the stress and pressure waves within the tubular-fluid system (inner and outer fluids as well as solid tube) has been developed. The model takes into account the coupling effect of the three mediums. A specific case of a 127mm solid tubular, placed inside a 340mm borehole with different inner and outer fluids was considered. An analytical solution of the developed model was obtained. It was found that the excitation of the system splits into several components and propagates within the three mediums. In addition, the coupling effect revealed modification in the normal waves’ speeds and frequencies as compared to the uncoupled solution and identifies associated natural frequencies. Moreover, it was noticed that the maximum vibration occurs at the free end of the tubular and that the tube may experience local buckling in the neighborhood of the fixed end.
Time-dependent, irreversible entropy production and geodynamics
Publisher: The Royal Society
Date: 13-01-2010
Abstract: We present an application of entropy production as an abstraction tool for complex processes in geodynamics. Geodynamic theories are generally based on the principle of maximum dissipation being equivalent to the maximum entropy production. This represents a restriction of the second law of thermodynamics to its upper bound. In this paper, starting from the equation of motion, the first law of thermodynamics and decomposition of the entropy into reversible and irreversible terms, 1 we come up with an entropy balance equation in an integral form. We propose that the extrema of this equation give upper and lower bounds that can be used to constrain geodynamics solutions. This procedure represents an extension of the classical limit analysis theory of continuum mechanics, which considers only stress and strain rates. The new approach, however, extends the analysis to temperature-dependent problems where thermal feedbacks can play a significant role. We apply the proposed procedure to a simple convective/conductive heat transfer problem such as in a planetary system. The results show that it is not necessary to have a detailed knowledge of the material parameters inside the planet to derive upper and lower bounds for self-driven heat transfer processes. The analysis can be refined by considering precise dissipation processes such as plasticity and viscous creep.
Green concrete with high-volume fly ash and slag with recycled aggregate and recycled water to build future sustainable cities
Publisher: American Society of Civil Engineers (ASCE)
Date: 02-2017
Molecular Architecture of Cobalt Porphyrin Multilayers on Reduced Graphene Oxide Sheets for High-Performance Oxygen Reduction Reaction
Publisher: Wiley
Date: 15-04-2013
Strength and durability of geopolymer concrete with high volume rubber replacement
Publisher: Elsevier BV
Date: 03-2021
Design of three-dimensional hierarchical TiO2/SrTiO3 heterostructures towards selective CO2 photoreduction
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9QI00350A
Abstract: 3D hierarchical TiO 2 /SrTiO 3 spheres have been constructed by sequential templating approach and exhibit superb photocatalytic activity and remarkable selectivity.
From transient to steady state deformation and grain size: A thermodynamic approach using elasto-visco-plastic numerical modeling
Publisher: American Geophysical Union (AGU)
Date: 02-2014
DOI: 10.1002/2013JB010701
Material and glass-fibre-reinforced polymer bond properties of geopolymer concrete
Publisher: Thomas Telford Ltd.
Date: 05-2020
Abstract: Geopolymers are recognised for their environmental benefits and excellent chloride and sulfate resistance. However, information on the material characteristics and bond behaviour of geopolymers based on fly ash (FA) and slag is still relatively scarce. This paper presents a comprehensive study on the integration of two modern construction materials – geopolymer concrete (GPC) based on FA and ground granulated blast-furnace slag and glass-fibre-reinforced polymer (GFRP) bars. The aim of the study was to assist concrete structural design by identifying the key preparation parameters such as hardening and bond behaviour. It was found that the hardening of the GPC was much faster than that of ordinary Portland cement (OPC) concrete at an early age and the stress–strain curves, elastic moduli and splitting tensile strengths of the GPC were accurately predicted by existing models developed for OPC concrete. The GFRP bars in the GPC outperformed those in the OPC concrete in terms of normalised bond strength. The GPC reinforced with both GFRP and steel rebars exhibited similar bond–slip curves to the OPC concrete. Overall, the behaviour of the GFRP-reinforced GPC was found to be analogous to that of the OPC concrete while providing adequate compressive, tensile and bond strength for the construction of foundations of low-rise buildings.
A novel technique for dynamic analysis of beam-like structures on tensionless elastic foundations subjected to moving loads
Publisher: Trans Tech Publications, Ltd.
Date: 28-08-2014
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.1016.192
Abstract: In this paper, a novel method is proposed to address the non-linear dynamic response of a beam-like structure supported by a tensionless foundation due to moving loads. A lattice spring model (LSM) is developed to describe the structure as a discrete assembly of particles interacting via shear and rotational springs while the tensionless foundation is simulated using a chain of one-way normal springs connecting the particles to the ground. The total time for the travelling load to traverse the beam is ided into a number of steps and the generalised explicit matrix equation can be solved for each time step to obtain the time-history response of the structure. An iterative procedure is adopted to obtain the correct sign of lateral displacement for all particles at each time step, which determines the lift-off regions throughout the beam.
The critical behaviour of finite thickness lining systems in tunnels
Publisher: Informa UK Limited
Date: 04-08-0016
One-step solid phase synthesis of a highly efficient and robust cobalt pentlandite electrocatalyst for the oxygen evolution reaction
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA07962H
Abstract: One-step concurrent growth of a Co 9 S 8 /carbon nanosheet composite as an efficient and robust oxygen evolution electrocatalyst.
Circular dichroism of graphene oxide: the chiral structure model
Publisher: Springer Science and Business Media LLC
Date: 16-01-2013
Facile Synthesis of High-Concentration, Stable Aqueous Dispersions of Uniform Silver Nanoparticles Using Aniline as a Reductant
Publisher: American Chemical Society (ACS)
Date: 24-03-2011
DOI: 10.1021/LA200013Z
A Novel Strategy for the Controlled Synthesis of Silver Halide/Polyaniline Nanocomposites with Different Polyaniline Morphologies
Publisher: Wiley
Date: 22-07-2012
Efficient water oxidation under visible light by tuning surface defects on ceria nanorods
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA05817A
Abstract: Surface defects including oxygen vacancies and Ce 3+ ions on the surface of CeO 2 nanorods lead to an efficient catalytic activity towards water oxidation under visible light.
Frame indifferent elastoplasticity of frictional materials at finite strain
Publisher: Elsevier BV
Date: 02-2011
Synthesis of high-performance one-dimensional polyaniline nanostructures using dodecylbenzene sulfonic acid as soft template
Publisher: Elsevier BV
Date: 03-2011
Modelling of Rock-Shotcrete Interfaces Using a Novel Bolted Cohesive Element
Publisher: Springer International Publishing
Date: 07-2023
Development of high strength one-part geopolymer mortar using sodium metasilicate
Publisher: Elsevier BV
Date: 03-2020
Modelling of unstiffened flush end-plate bolted connections in fire
Publisher: Elsevier BV
Date: 2006
Behaviour and design of cold-formed CHS under static pure bending through finite element analysis
Publisher: Elsevier BV
Date: 02-2020
Leaching of a polymetal gold ore and reducing cyanide consumption using cyanide-glycine solutions
Publisher: Elsevier BV
Date: 03-2021
Thermal-elastic stresses and the criticality of the continental crust
Publisher: American Geophysical Union (AGU)
Date: 09-2012
DOI: 10.1029/2012GC004085
Three-dimensional graphene/Pt nanoparticle composites as freestanding anode for enhancing performance of microbial fuel cells.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 06-11-2015
Abstract: A microbial fuel cell constructed with 3D freestanding graphene aerogel latinum nanoparticles shows unprecedented performance.
The Optimization of Cemented Hydraulic Backfill Mixture Design Parameters for Different Strength Conditions Using Artificial Intelligence Algorithms
Publisher: Springer International Publishing
Date: 30-11-2020
Experiments and Finite Element Analysis of GFRP Reinforced Geopolymer Concrete Rectangular Columns Subjected to Concentric and Eccentric Axial Loading
Publisher: Elsevier BV
Date: 06-2018
A lattice spring model for dynamic analysis of damaged beam-type structures under moving loads
Publisher: Elsevier BV
Date: 11-2016
Behaviour of Concrete-filled Double-skin Short Columns Under Compression Through Finite Element Modelling
Publisher: Elsevier BV
Date: 06-2018
Modelling glass fibre-reinforced polymer reinforced geopolymer concrete columns
Publisher: Elsevier BV
Date: 08-2019
Finite element modelling of concrete-filled double-skin short compression members with CHS outer and SHS inner tubes
Publisher: Elsevier BV
Date: 09-2018
Cu2O clusters grown on TiO2 nanoplates as efficient photocatalysts for hydrogen generation
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5QI00284B
Abstract: Ultrafine Cu 2 O nanoclusters are uniformly grown on the surface of TiO 2 nanoplates, giving rise to the enhanced photocatalytic H 2 evolution via water reduction.
Analytical solution for stress distribution around deep lined pressure tunnels under the water table
Publisher: Elsevier BV
Date: 11-2019
Cross-diffusion waves resulting from multiscale, multiphysics instabilities: application to earthquakes
Publisher: Copernicus GmbH
Date: 16-08-2021
Abstract: Abstract. Theoretical approaches to earthquake instabilities propose shear-dominated source mechanisms. Here we take a fresh look at the role of possible volumetric instabilities preceding a shear instability. We investigate the phenomena that may prepare earthquake instabilities using the coupling of thermo-hydro-mechano-chemical reaction–diffusion equations in a THMC diffusion matrix. We show that the off-diagonal cross-diffusivities can give rise to a new class of waves known as cross-diffusion or quasi-soliton waves. Their unique property is that for critical conditions cross-diffusion waves can funnel wave energy into a stationary wave focus from large to small scale. We show that the rich solution space of the reaction–cross-diffusion approach to earthquake instabilities can recover classical Turing instabilities (periodic in space instabilities), Hopf bifurcations (spring-slider-like earthquake models), and a new class of quasi-soliton waves. Only the quasi-soliton waves can lead to extreme focussing of the wave energy into short-wavelength instabilities of short duration. The equivalent extreme event in ocean waves and optical fibres leads to the appearance of “rogue waves” and high energy pulses of light in photonics. In the context of hydromechanical coupling, a rogue wave would appear as a sudden fluid pressure spike. This spike is likely to cause unstable slip on a pre-existing (near-critically stressed) fault acting as a trigger for the ultimate (shear) seismic moment release.
On Beam Hopping Pattern Design for Satellite Communication Systems With Hybrid Precoding
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Behaviour and design of rubberised concrete filled steel tubes under combined loading conditions
Publisher: Elsevier BV
Date: 06-2019
A Micromechanical Approach for Anisotropic Rock Mass Thermo-Mechanical Properties Estimation
Publisher: Elsevier BV
Date: 2017
Improvements to local projective noise reduction through higher order and multiscale refinements
Publisher: AIP Publishing
Date: 06-2015
DOI: 10.1063/1.4922473
Abstract: The broad spectrum characteristic of signals from nonlinear systems obstructs noise reduction techniques developed for linear systems. Local projection was developed to reduce noise while preserving nonlinear deterministic structures, and a second order refinement to local projection which was proposed ten years ago does so particularly effectively. It involves adjusting the origin of the projection subspace to better accommodate the geometry of the attractor. This paper describes an analytic motivation for the enhancement from which follows further higher order and multiple scale refinements. However, the established enhancement is frequently as or more effective than the new filters arising from solely geometric considerations. Investigation of the way that measurement errors reinforce or cancel throughout the refined local projection procedure explains the special efficacy of the existing enhancement, and leads to a new second order refinement offering widespread gains. Different local projective filters are found to be best suited to different noise levels. At low noise levels, the optimal order increases as noise increases. At intermediate levels second order tends to be optimal, while at high noise levels prototypical local projection is most effective. The new higher order filters perform better relative to established filters for longer signals or signals corresponding to higher dimensional attractors.
The surface sulfur doping induced enhanced performance of cobalt catalysts in oxygen evolution reactions
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CC04387A
Abstract: Surface sulfur-doping can change the electronic properties of Co catalysts, leading to significantly improved performance in oxygen evolution reactions.
Analytical model for the expansion of tubes under tension
Publisher: Elsevier BV
Date: 2010
Coupled Thermo-mechanical Behavior of Weakening Geo-Materials
Publisher: Springer Science and Business Media LLC
Date: 18-12-2019
Corrigendum to “Multi-scale modeling approach to predict the nonlinear behavior of CNT reinforced concrete columns subjected to service loading” [Structures 14 (2018) 301–312] (Structures (2018) 14 (301–312), (S2352012418300407), (10.1016/j.istruc.2018.03.015))
Publisher: Elsevier BV
Date: 04-2021
Lattice Finite Strain Theory for Non-hydrostatically Compressed Materials
Publisher: Springer Science and Business Media LLC
Date: 21-03-2018
Finite element simulation of circular short CFDST columns under axial compression
Publisher: Elsevier BV
Date: 08-2019
Glass fibre-reinforced polymer circular alkali-activated fly ash/slag concrete members under combined loading
Publisher: Elsevier BV
Date: 11-2019
3D bolted cohesive element for the modelling of bolt-reinforced rough rock-shotcrete interfaces
Publisher: Elsevier BV
Date: 09-2020
Free vibration analysis of a cracked shear deformable beam on a two-parameter elastic foundation using a lattice spring model
Publisher: Elsevier BV
Date: 05-2014
Development of ECO-UHPC utilizing gold mine tailings as quartz sand alternative
Publisher: Elsevier BV
Date: 10-2021
Analytical Solution for Wave Propagation Due to Pop-Out Phenomenon in Solid Expandable Tubular Technology
Publisher: Informa UK Limited
Date: 08-2006
Manipulating the assembled structure of atomically thin CoSe2 nanomaterials for enhanced water oxidation catalysis
Publisher: Elsevier BV
Date: 03-2019
Damping Effect on Mechanical Waves in an Elastic Solid Expanded Tubular
Publisher: ASME International
Date: 08-2007
DOI: 10.1115/1.2767363
Abstract: The present paper studies the dynamics of submerged expanded elastic tubes due to postexpansion sudden mandrel release known as pop-out phenomenon. A mathematical model describing the dynamics of the borehole-fluid-tube system is presented. Coupling of the fluid-structure interaction and d ing effects were taken into consideration. An analytical solution for the displacement, stress, and pressure wave propagation in the fluid-tube system was obtained. The developed model predicted localized critical regions where the structure might experience failure.
Shear strengthening of high strength lightweight SCC beams internally reinforced with GFRP bars and external CFRP strips
Publisher: Elsevier BV
Date: 2022
Poromechanics of saturated media based on the logarithmic finite strain
Publisher: Elsevier BV
Date: 08-2012
Remarkably enhanced water splitting activity of nickel foam due to simple immersion in a ferric nitrate solution
Publisher: Springer Science and Business Media LLC
Date: 08-2018
"Raisin Bun"-Like Nanocomposites of Palladium Clusters and Porphyrin for Superior Formic Acid Oxidation
Publisher: Wiley
Date: 10-04-2013
Instability of mechanically lined pipelines under large deformation
Publisher: Elsevier BV
Date: 07-2018
Three dimensional iron oxide/graphene aerogel hybrids as all-solid-state flexible supercapacitor electrodes
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA11106H
Abstract: Three dimensional iron oxide/graphene aerogel hybrid (Fe 2 O 3 /GA) was synthesized and used as electrode materials in flexible supercapacitor devices, which show high specific capacitance of 440 F g −1 with 89% capacitance retention after 2200 cycles.
Dissipative propagation of pressure waves along the slip-lines of yielding material
Publisher: Elsevier BV
Date: 10-2016
Experimental investigation on lightweight rubberized concrete beams strengthened with BFRP sheets subjected to impact loads
Publisher: Elsevier BV
Date: 02-2020
Ultrathin platinum nanowires grown on single-layered nickel hydroxide with high hydrogen evolution activity
Publisher: Springer Science and Business Media LLC
Date: 02-03-2015
DOI: 10.1038/NCOMMS7430
Axial impact behavior and energy absorption of rubberized concrete with/without fiber-reinforced polymer confinement
Publisher: SAGE Publications
Date: 20-09-2019
Abstract: This study investigates the axial impact resistance and energy absorption of rubberized concrete with/without fiber-reinforced polymer confinement. The impact tests were carried out using an instrumented drop-weight testing apparatus. The experimental results have shown that rubberized concrete significantly reduced the maximum impact force of up to 50% and extended the impact duration. These characteristics make rubberized concrete a promising material for protective structures and particularly for future sustainable construction of rigid roadside barriers. Glass fiber–reinforced polymer confinement is a very effective method to improve the impact resistance for both conventional concrete and particularly for rubberized concrete. It was found that the rubberized concrete reduced the maximum impact force so that it transferred a lower force to a protected structure as well as a lower rebound force, which is desirable for protection of passengers in an incident of vehicle collision. Interestingly, the rubberized concrete showed a lower energy absorption capacity as compared to conventional concrete, where the exact reason for this is unknown to the authors. Therefore, further research is sought to provide more understanding of the response of rubberized concrete under impact and improve its energy absorption. This study explored experimentally the use of rubberized concrete as a promising sustainable construction material for applications to construction of columns in buildings located in seismic active zones or subjected to terrorist attack, security bollards and rigid road side barriers.
Strongly Coupled CoCr2 O4 /Carbon Nanosheets as High Performance Electrocatalysts for Oxygen Evolution Reaction.
Publisher: Wiley
Date: 18-04-2016
Carbonized Nanoscale Metal-Organic Frameworks as High Performance Electrocatalyst for Oxygen Reduction Reaction
Publisher: American Chemical Society (ACS)
Date: 03-12-2014
DOI: 10.1021/NN505582E
Analytical solution of energy redistribution in rectangular openings upon in-situ rock mass alteration
Publisher: Elsevier BV
Date: 06-2018
Laboratory evaluation of shear strength properties for cement-based grouted coal mass
Publisher: Springer Science and Business Media LLC
Date: 11-2019
Biomechanical stability of hernia-damaged abdominal walls
Publisher: Springer Science and Business Media LLC
Date: 27-03-2023
DOI: 10.1038/S41598-023-31674-W
Abstract: Hernia occurs when the peritoneum and/or internal organs penetrate through a defect in the abdominal wall. Implanting mesh fabrics is a common way to reinforce the repair of hernia-damaged tissues, despite the risks of infection and failure associated with them. However, there is neither consensus on the optimum mesh placement within the abdominal muscles complex nor on the minimum size of hernia defect that requires surgical correction. Here we show that the optimum position of the mesh depends on the hernia location placing the mesh on the transversus abdominis muscles reduces the equivalent stresses in the damaged zone and represents the optimum reinforcement solution for incisional hernia. However, retrorectus reinforcement of the linea alba is more effective than preperitoneal, anterectus, and onlay implantations in the case of paraumbilical hernia. Using the principles of fracture mechanics, we found that the critical size of a hernia damage zone becomes severe at 4.1 cm in the rectus abdominis and at larger sizes (5.2–8.2 cm) in other anterior abdominal muscles. Furthermore, we found that the hernia defect size must reach 7.8 mm in the rectus abdominis before it influences the failure stress. In other anterior abdominal muscles, hernia starts to influence the failure stress at sizes ranging from 1.5 to 3.4 mm. Our results provide objective criteria to decide when a hernia damage zone becomes severe and requires repair. They demonstrate where mesh should be implanted for a mechanically stable reinforcement, depending on the type of hernia. We anticipate our contribution to be a starting point for sophisticated models of damage and fracture biomechanics. For ex le, the apparent fracture toughness is an important physical property that should be determined for patients living with different obesity levels. Furthermore, relevant mechanical properties of abdominal muscles at various ages and health conditions would be significant to generate patient specific results.
Modelling of multicomponent reactive transport in finite columns — Application to gold recovery using iodide ligands
Publisher: Elsevier BV
Date: 06-2018
An engineered ML model for prediction of the compressive strength of Eco-SCC based on type and proportions of materials
Publisher: Elsevier BV
Date: 06-2022
Non-Equilibrium Thermodynamics for Fully Coupled Thermal Hydraulic Mechanical Chemical Processes
Publisher: Elsevier BV
Date: 03-2013
Erratum: Free vibration analysis of a cracked shear deformable beam on a two-parameter elastic foundation using a lattice ( Journal of Sound and Vibration (2014) 333:11 (2359-2377))
Publisher: Elsevier BV
Date: 03-2015
Model and Experiment of Multiscale Dynamic Permeability in Series for Coalbed Gas Flowing through Micro-Nanopores
Publisher: American Chemical Society (ACS)
Date: 26-08-2022
Systematic approach to assessing the applicability of fly-ash-based geopolymer for clay stabilization
Publisher: Canadian Science Publishing
Date: 09-2020
Abstract: Traditional soil stabilization by chemical additives such as cement and lime is a well-established technique for ground improvement of problematic soils. However, with the advantage of lower carbon emission and energy consumption, fly-ash-based geopolymer has recently become an attractive alternative to traditional stabilizers. Nevertheless, the literature lacks systemic approaches that assist engineers to apply this promising binder for soil stabilization, including the proper dosages required for an effective treatment. This paper introduces a systematic approach to assess the applicability of fly-ash-based geopolymer for stabilization of clay soils, through a comprehensive experimental program where engineered and natural clays were examined and evaluated, including soil compaction, plasticity, compressive strength, durability, pH level, and impact of pulverization. The results revealed several factors that influence the level of enhancement of geopolymer-treated clays, including the soil mineralogy, plasticity–activity properties, geopolymer concentration, curing time, and pulverization.
Pt-Ni Alloy Nanoparticles as Superior Counter Electrodes for Dye-Sensitized Solar Cells: Experimental and Theoretical Understanding
Publisher: Wiley
Date: 31-10-2014
Two-Dimensional Architecture at Nanojunctions for Photocatalytic Hydrogen Generation
Publisher: Wiley
Date: 12-02-2015
Experimental and Analytical Study on Geomechanical Behavior of Biocemented Sand
Publisher: American Society of Civil Engineers (ASCE)
Date: 08-2021
Energy and thermal performance of a typical rammed earth residential building in Western Australia
Publisher: Elsevier BV
Date: 04-2022
Non-linear thermo-mechanics of folding in geomaterials
Publisher: Springer Berlin Heidelberg
Date: 08-10-2014
Plastic and yield slenderness limits for circular concrete filled tubes subjected to static pure bending
Publisher: Elsevier BV
Date: 12-2016
Multi-objective mixture design and optimisation of steel fiber reinforced UHPC using machine learning algorithms and metaheuristics
Publisher: Springer Science and Business Media LLC
Date: 17-05-2022
Thermo-poro-mechanics Modelling of Gypsum Dehydration
Publisher: Springer International Publishing
Date: 12-07-2018
Pore formation during dehydration of a polycrystalline gypsum sample observed and quantified in a time-series synchrotron X-ray micro-tomography experiment
Publisher: Copernicus GmbH
Date: 08-03-2012
DOI: 10.5194/SE-3-71-2012
Abstract: Abstract. We conducted an in-situ X-ray micro-computed tomography heating experiment at the Advanced Photon Source (USA) to dehydrate an unconfined 2.3 mm diameter cylinder of Volterra Gypsum. We used a purpose-built X-ray transparent furnace to heat the s le to 388 K for a total of 310 min to acquire a three-dimensional time-series tomography dataset comprising nine time steps. The voxel size of 2.2 μm3 proved sufficient to pinpoint reaction initiation and the organization of drainage architecture in space and time. We observed that dehydration commences across a narrow front, which propagates from the margins to the centre of the s le in more than four hours. The advance of this front can be fitted with a square-root function, implying that the initiation of the reaction in the s le can be described as a diffusion process. Novel parallelized computer codes allow quantifying the geometry of the porosity and the drainage architecture from the very large tomographic datasets (20483 voxels) in unprecedented detail. We determined position, volume, shape and orientation of each resolvable pore and tracked these properties over the duration of the experiment. We found that the pore-size distribution follows a power law. Pores tend to be anisotropic but rarely crack-shaped and have a preferred orientation, likely controlled by a pre-existing fabric in the s le. With on-going dehydration, pores coalesce into a single interconnected pore cluster that is connected to the surface of the s le cylinder and provides an effective drainage pathway. Our observations can be summarized in a model in which gypsum is stabilized by thermal expansion stresses and locally increased pore fluid pressures until the dehydration front approaches to within about 100 μm. Then, the internal stresses are released and dehydration happens efficiently, resulting in new pore space. Pressure release, the production of pores and the advance of the front are coupled in a feedback loop.
Dynamic response of rubberized concrete columns with and without FRP confinement subjected to lateral impact
Publisher: Elsevier BV
Date: 10-2018
Dual cohesive elements for 3D modelling of synthetic fibre-reinforced concrete
Publisher: Elsevier BV
Date: 11-2018
Simulation of solid tubular expansion in well drilling using finite element method
Publisher: Informa UK Limited
Date: 07-2005
Metal-free, active nitrogen-enriched, efficient bifunctional oxygen electrocatalyst for ultrastable zinc-air batteries
Publisher: Elsevier BV
Date: 05-2019
Limit analysis for the seismic stability of three-dimensional rock slopes using the generalized Hoek-Brown criterion
Publisher: Elsevier BV
Date: 03-2022
Efficient Electrocatalytic Water Oxidation by Using Amorphous Ni-Co Double Hydroxides Nanocages
Publisher: Wiley
Date: 09-03-2015
Metallic Cobalt-Carbon Composite as Recyclable and Robust Magnetic Photocatalyst for Efficient CO2 Reduction
Publisher: Wiley
Date: 18-07-2018
CFRP strengthening and rehabilitation of corroded steel pipelines under direct indentation
Publisher: Elsevier BV
Date: 10-2017
Co3O4 Hexagonal Platelets with Controllable Facets Enabling Highly Efficient Visible‐Light Photocatalytic Reduction of CO2
Publisher: Wiley
Date: 12-05-2016
Shape-dependent electrocatalytic activity of monodispersed palladium nanocrystals toward formic acid oxidation
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3NR03100D
A discrete element study of settlement in vibrated granular layers: role of contact loss and acceleration
Publisher: Springer Science and Business Media LLC
Date: 02-04-2008
Poromechanics of Fractured/Faulted Reservoirs During Fluid Injection Based on Continuum Damage Modeling and Machine Learning
Publisher: Springer Science and Business Media LLC
Date: 30-10-2023
Multi-scale Modeling Approach to Predict the Nonlinear Behavior of CNT-reinforced Concrete Columns Subjected to Service Loading
Publisher: Elsevier BV
Date: 06-2018
Modelling fault reactivation and fluid flow around a fault restraining step-over structure in the Laverton gold region, Yilgarn Craton, Western Australia
Publisher: Wiley
Date: 23-12-2013
DOI: 10.1111/GFL.12012
Design of T-shaped tube hydroforming using finite element and artificial neural network modeling
Publisher: Springer Science and Business Media LLC
Date: 03-2020
Flexural behavior of all lightweight reinforced concrete beams externally strengthened with CFRP sheets
Publisher: Elsevier BV
Date: 04-2022
Non-linear analysis of beam-like structures on unilateral foundations: A lattice spring model
Publisher: Elsevier BV
Date: 06-2016
Coupling of thermal-hydraulic-mechanical processes for geothermal reservoir modelling
Publisher: Springer Science and Business Media LLC
Date: 30-01-2015
Thermal-hydraulic-mechanical-chemical coupling with damage mechanics using ESCRIPTRT and ABAQUS
Publisher: Elsevier BV
Date: 03-2012
Inclusive education - worldly views?
Publisher: Wiley
Date: 02-2015
GRE pipeline installation procedures - A field case study
Publisher: ASMEDC
Date: 2010
Abstract: Field layout Glass Reinforced Epoxy (GRE) pipeline is generally handled by unskilled workers with limited or no background of the mechanics of pipes subjected to large deformation. This paper, therefore, presents working envelops for field operators to avoid any potential GRE pipe failure during installation through finite element modeling using ANSYS. The finite element models consist of various pipe sizes subjected to typical loading conditions similar to field pipeline layout. The models were used to estimate the pipe deflection and the induced stresses. The analysis was based on the assumption that the pipeline acts as a cantilever beam. The internal normal force, shear force, and bending moment were obtained for each section along the pipe length under study. The maximum normal stress was calculated and compared to the failure strength of GRE for various lifting scenarios. A sensitivity analysis on the various parameters affecting the structural integrity of the pipeline was also performed. It was found that the threshold lifting height causing potential pipe failure is 2 m for all pipe sizes. Moreover, the results showed that the minimum threshold height increases for smaller pipe sizes.
Theoretical Understanding of Electrocatalytic Hydrogen Production Performance by Low-Dimensional Metal–Organic Frameworks on the Basis of Resonant Charge-Transfer Mechanisms
Publisher: American Chemical Society (ACS)
Date: 25-10-2019
Multiscale coupling and multiphysics approaches in earth science: Theory
Publisher: American Scientific Publishers
Date: 04-2013
A limit analysis approach to derive a thermodynamic damage potential for non-linear geomaterials
Publisher: Informa UK Limited
Date: 14-06-2012
Multi-objective mixture design of cemented paste backfill using particle swarm optimisation algorithm
Publisher: Elsevier BV
Date: 07-2020
Non-linear modal analysis of structural components subjected to unilateral constraints
Publisher: Elsevier BV
Date: 02-2017
2D Electrocatalysts for Converting Earth‐Abundant Simple Molecules into Value‐Added Commodity Chemicals: Recent Progress and Perspectives
Publisher: Wiley
Date: 10-2019
Testing and modelling of geopolymer concrete members with fibreglass reinforcement
Publisher: Thomas Telford Ltd.
Date: 2021
Abstract: The poor durability of ordinary Portland cement concrete and the corrosion of conventional steel reinforcement have a major impact on the viability, safety and serviceability of reinforced concrete structures, particularly in marine environments. Geopolymer concrete (GPC) reinforced with corrosion-free glass-fibre-reinforced polymer bars is ideal for projects such as bridge piers in coastal zones where corrosion is severe. This paper reports on an examination into the behaviour of this novel construction material under axial, combined and flexural loading and validation of a numerical model of the material. To this end, 11 GPC specimens constructed with various stirrup spacings were subjected to a range of loading conditions. The concrete was modelled using the widely used concrete damage plasticity model and linear elastic behaviour was used for the fibreglass bars and stirrups. The predicted axial load–deflection responses were in close agreement with the experimental data, especially for concentrically loaded columns. The load capacities of eccentrically loaded columns and beams were slightly overpredicted by the model due to a tendency of the fibreglass stirrups to open up prematurely.
Strengthening of mild steel struts using CFRP sheets subjected to uniform axial compression
Publisher: Elsevier BV
Date: 07-2017
Pore formation during dehydration of polycrystalline gypsum sample observed and quantified in a time-series synchrotron X-ray micro-tomography experiment
Publisher: Copernicus GmbH
Date: 21-10-2012
Abstract: Abstract. We conducted an in-situ X-ray micro-computed tomography heating experiment at the Advanced Photon Source (USA) to dehydrate an unconfined 2.3 mm diameter cylinder of Volterra Gypsum. We used a purpose-built X-ray transparent furnace to heat the s le to 388 K for a total of 310 min to acquire a three-dimensional time-series tomography dataset comprising nine time steps. The voxel size of 2.2 μm3 proved sufficient to pinpoint reaction initiation and the organization of drainage architecture in space and time. We observed that dehydration commences across a narrow front, which propagates from the margins to the centre of the s le in more than four hours. The advance of this front can be fitted with a square-root function, implying that the initiation of the reaction in the s le can be described as a diffusion process. Novel parallelized computer codes allow quantifying the geometry of the porosity and the drainage architecture from the very large tomographic datasets (6.4 × 109 voxel each) in unprecedented detail. We determined position, volume, shape and orientation of each resolvable pore and tracked these properties over the duration of the experiment. We found that the pore-size distribution follows a power law. Pores tend to be anisotropic but rarely crack-shaped and have a preferred orientation, likely controlled by a pre-existing fabric in the s le. With on-going dehydration, pores coalesce into a single interconnected pore cluster that is connected to the surface of the s le cylinder and provides an effective drainage pathway. Our observations can be summarized in a model in which gypsum is stabilized by thermal expansion stresses and locally increased pore fluid pressures until the dehydration front approaches to within about 100 μm. Then, the internal stresses are released and dehydration happens efficiently, resulting in new pore space. Pressure release, the production of pores and the advance of the front are coupled in a feedback loop. We discuss our findings in the context of previous studies.
Evaluating force distributions within virtual uncemented mine backfill using discrete element method
Publisher: American Society of Civil Engineers (ASCE)
Date: 07-2017
High strength flowable lightweight concrete incorporating low C3A cement, silica fume, stalite and macro-polyfelin polymer fibres
Publisher: Elsevier BV
Date: 04-2021
Modeling and simulation of dynamic unloading of prestressed rockmass
Publisher: Computers, Materials and Continua (Tech Science Press)
Date: 2019
Dynamic Effects of Mandrel/Tubular Interaction on Downhole Solid Tubular Expansion in Well Engineering
Publisher: ASME International
Date: 05-02-2009
DOI: 10.1115/1.3066412
Abstract: The expansion process subjects a solid tubular to large plastic deformations leading to variations in tubular thickness and length, which may result in premature and unexpected failures. It was noticed that the expansion process induces wall thickness imperfections due to excessive local plastic deformation as a result of mandrel sticking and slipping relative to the expanded tubular such irregularities increase the probability of failure. Mandrel sticking may be the result of lack of enough lubrication, tubular surface irregularities, and the presence of welded and/or threaded connections, which require higher drawing force to push the mandrel forward. When the drawing force required to overcoming the maximum static friction and the mandrel forward motion is assured, the mandrel slips relative to the expanded tubular. This “stick-slip” phenomenon results in mandrel oscillations that affect the tubular response in terms of further reduction in thickness and may jeopardize the tubular capacity under normal operating field conditions. Therefore, the present work studies the mandrel dynamics and their effect on the tubular structural response. A mathematical model, which is an extension of the quasistatic tubular expansion analysis, has been developed to describe the dynamic friction effects of the stick-slip phenomenon. A special case of tubular expansion consisting of 25% expansion ratio of a 4/12 in. (114.3 mm) liner hanger was considered. It was found that the level of mandrel oscillations is in the order of 1–2 mm around its equilibrium position resulting in tubular thickness reduction of approximately 9% on top of its variation caused by the steady state expansion process. This increase in thickness reduction may affect the postexpansion collapse strength of the tubular.
Experimental investigation of rectangular air-cured geopolymer concrete columns reinforced with GFRP bars and stirrups
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2019
Gold extraction from paleochannel ores using an aerated alkaline glycine lixiviant for consideration in heap and in-situ leaching applications
Publisher: Elsevier BV
Date: 07-2019
Investigation into the Nonlinear Time-History Analysis of CNT-Reinforced Concrete Column by a Multiscale Approach
Publisher: Springer Science and Business Media LLC
Date: 16-09-2020
Cyclic behaviour of clay stabilised with fly-ash based geopolymer incorporating ground granulated slag
Publisher: Elsevier BV
Date: 2021
Molecular engineering of Ni–/Co–porphyrin multilayers on reduced graphene oxide sheets as bifunctional catalysts for oxygen evolution and oxygen reduction reactions
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6SC02083F
Abstract: Ni– and Co–porphyrin multilayers on reduced graphene oxide (rGO) sheets are reported as novel bifunctional catalysts for the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR).
Dynamic constitutive behavior of LPBFed metal alloys
Publisher: Elsevier BV
Date: 07-2023
Development of fly ash-and slag-based geopolymer concrete with calcium carbonate or microsilica
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2018
Energy dissipation and storage in underground mining operations
Publisher: Springer Science and Business Media LLC
Date: 23-06-2019
Cross-diffusion waves resulting from multiscale, multi-physics instabilities: theory
Publisher: Copernicus GmbH
Date: 16-04-2021
Abstract: Abstract. We propose a multiscale approach for coupling multi-physics processes across the scales. The physics is based on discrete phenomena, triggered by local thermo-hydro-mechano-chemical (THMC) instabilities, that cause cross-diffusion (quasi-soliton) acceleration waves. These waves nucleate when the overall stress field is incompatible with accelerations from local feedbacks of generalized THMC thermodynamic forces that trigger generalized thermodynamic fluxes of another kind. Cross-diffusion terms in the 4×4 THMC diffusion matrix are shown to lead to multiple diffusional P and S wave equations as coupled THMC solutions. Uncertainties in the location of meso-scale material instabilities are captured by a wave-scale correlation of probability litudes. Cross-diffusional waves have unusual dispersion patterns and, although they assume a solitary state, do not behave like solitons but show complex interactions when they collide. Their characteristic wavenumber and constant speed define mesoscopic internal material time–space relations entirely defined by the coefficients of the coupled THMC reaction–cross-diffusion equations. A companion paper proposes an application of the theory to earthquakes showing that excitation waves triggered by local reactions can, through an extreme effect of a cross-diffusional wave operator, lead to an energy cascade connecting large and small scales and cause solid-state turbulence.
Multiscale, multiphysics geomechanics for geodynamics applied to buckling instabilities in the middle of the Australian craton
Publisher: Informa UK Limited
Date: 17-08-2015
Synergistic effect of CuxOy-NPs/TiO2-NTs heterostructure on the photodegradation of amido black staining
Publisher: Elsevier BV
Date: 02-2023
Wet-chemistry grafted active pyridinic nitrogen sites on holey graphene edges as high performance ORR electrocatalyst for Zn-Air batteries
Publisher: Elsevier BV
Date: 03-2019
Anisotropic damage mechanics as a novel approach to improve pre- and post-failure borehole stability analysis
Publisher: Oxford University Press (OUP)
Date: 03-04-2013
DOI: 10.1093/GJI/GGT045
Isotropic energy absorption of topology optimized lattice structure
Publisher: Elsevier BV
Date: 2023
Computational monitoring in real time
Publisher: Springer Science and Business Media LLC
Date: 19-06-2018
Ductile deformation of single inclusions in simple shear with a finite-strain hyperelastoviscoplastic rheology
Publisher: Wiley
Date: 09-10-2015
Multiscale coupling and multiphysics approaches in earth sciences: Applications
Publisher: American Scientific Publishers
Date: 09-2013
Micromechanics modelling of cement stabilised rammed earth
Publisher: Elsevier BV
Date: 09-2020
Digital bread crumb: Creation and application
Publisher: Elsevier BV
Date: 06-2013
The prediction of ultimate pure bending moment of concrete-filled steel tubes by adaptive neuro-fuzzy inference system (ANFIS)
Publisher: Springer Science and Business Media LLC
Date: 26-06-2019
A damaged visco-plasticity model for pressure and temperature sensitive geomaterials
Publisher: Elsevier BV
Date: 10-2011
Finite element modelling of rate-dependent ratcheting in granular materials
Publisher: Elsevier BV
Date: 03-2011
Molecular discrimination of shelf-spawned eggs of two co-occurring Trachurus spp. (Carangidae) in southeastern Australia: a key step to future egg-based bio
Publisher: Oxford University Press (OUP)
Date: 11-09-2014
Abstract: A molecular approach was successfully developed to discriminate between spawned eggs of the pelagic carangids Trachurus declivis and Trachurus novaezelandiae collected during ichthyoplankton surveys conducted in October 2002 and 2003 along shelf waters of Queensland (Qld) and New South Wales (NSW), in southeastern Australia (25o50′–37o30′S). Visually identified Trachurus eggs were subjected to mtDNA analysis by targeting specific fragments of the cytochrome oxidase subunit 1 (CO1) and cytochrome b (Cyt b) genes, with three diagnostic sites (single-nucleotide polymorphisms) within a 297 bp segment of Cyt b (558, 588, 825) providing the best approach to discriminate between species. Polymerase chain reaction lification and sequencing of 608 suspected Trachurus eggs resulted in 586 (96.4%) high-quality sequences that unequivocally identified 315 and 207 eggs as T. declivis and T. novaezelandiae, respectively, as well as 18 “variant haplotype” eggs that exhibited a base substitution at one of the diagnostic sites the remaining 46 sequences aligned to three different genera in GenBank including two carangids, thus highlighting the effectiveness of molecular methods for egg identification. Rehydrated, mtDNA-verified eggs of T. declivis were significantly larger (0.97 ± 0.01 mm) than those of T. novaezelandiae (0.82 ± 0.01 mm), though still proved problematic to identify to species when relying on morphology alone. Egg distributions showed main spawning areas of T. declivis and T. novaezelandiae confined mostly to southern NSW (& °S) and northern NSW/southern Qld (& °S), respectively, with T. novaezelandiae likely to continue spawning further south during summer with the gradual temperature increase associated with the south-flowing East Australian Current. Overall findings support the adoption of comparable molecular protocols to verify identification of wild spawned eggs to species level, especially eggs collected during the application of the daily egg production method to estimate spawning biomass of pelagic species, as well as biological fish studies.
Management and valorisation of delithiated β-spodumene and its processing stream
Publisher: Elsevier BV
Date: 12-2021
Post-Expansion Tube Response under Mechanical and Hydraulic Expansion - A comparative Study
Publisher: ASME International
Date: 09-04-2007
DOI: 10.1115/1.2389028
Abstract: This paper presents a mathematical model of post-expansion tube response under mechanical expansion. The stress, pressure, and displacement waves propagating through the tube-fluid system and their effect on the tube response are studied. The model takes into account coupling between the solid tube and surrounding fluid at the borehole/expanded tube annulus, as well as the d ing effect on tube structural response. The paper also conducts a comparative study aiming at studying the post-expansion tubular fluid response and identifying the different features between hydraulic and mechanical solid tube expansion. The results showed that the mechanical expansion is less harmful to the tube structural integrity. Unlike the hydraulic expansion, which resulted in local stress buildup along the tube, the mechanical expansion was characterized by low equivalent stress throughout its length and a smooth dying out response.
Modelling of deformation around magmatic intrusions with application to gold-related structures in the Yilgarn Craton, Western Australia
Publisher: Elsevier BV
Date: 03-2012
Three dimensional N-doped graphene/PtRu nanoparticle hybrids as high performance anode for direct methanol fuel cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3TA14809B
Mechanical properties and chloride penetration resistances of very-low-C3A cement based SC-UHP-SFRCs incorporating metakaolin and slag
Publisher: Elsevier BV
Date: 07-2022
Cobalt-based composite films on electrochemically activated carbon cloth as high performance overall water splitting electrodes
Publisher: Elsevier BV
Date: 2019
A unified multi-scale thermodynamical framework for coupling geomechanical and chemical simulations
Publisher: Elsevier BV
Date: 03-2010
Dynamic response of cracked Timoshenko beams on elastic foundations under moving harmonic loads
Publisher: SAGE Publications
Date: 08-08-2017
Abstract: A thorough understanding of the dynamic behavior of one-dimensional structural members such as beams plays a crucial role in specialized disciplines including ocean, bridge and railway engineering. The vibratory response of an in-service beam-like component may deviate from that expected from the intact structure when defects are present. In this work, we present a semi-analytical approach to predict the forced response of a multi-cracked Timoshenko beam traversed by a moving harmonic load with constant speed. The beam is fully or partially supported by the viscoelastic foundation, where the normal stiffness and shear modulus of the subgrade are considered. The effects of transverse open cracks are modeled by massless rotational springs with a linear moment-rotation constitutive law to account for the local flexibility induced by the damage. Based on the transfer matrix method, the defective structure is treated as an assembly of sub-beams to derive the eigenvalue solution of the system. The time response is then obtained by utilizing identical generalized coordinates for lateral and rotational displacement components when applying the modal expansion technique. The use of general elastic end constraints allows us to recover all possible boundary conditions. Numerical ex les are also provided to demonstrate the robustness and accuracy of the proposed method, and also to investigate the influence of important parameters on the dynamic behavior of the damaged structure.
Deep Geothermal: The 'Moon Landing' Mission in the Unconventional Energy and Minerals Space
Publisher: Springer Science and Business Media LLC
Date: 30-01-2015
Improved thermal insulance of cement stabilised rammed earth embedding lightweight aggregates
Publisher: Elsevier BV
Date: 2021
Closed-Form Solution to the Poromechanics of Deep Arbitrary-Shaped Openings Subjected to Rock Mass Alteration
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2020
Experimental investigation of rubberised concrete-filled double skin square tubular columns under axial compression
Publisher: Elsevier BV
Date: 09-2018
Two-Step Activated Carbon Cloth with Oxygen-Rich Functional Groups as a High-Performance Additive-Free Air Electrode for Flexible Zinc-Air Batteries
Publisher: Wiley
Date: 03-12-2019
Dynamics of submerged expandable tubes in borehole wells
Publisher: ASMEDC
Date: 2005
Abstract: Solid Expandable Tubular Technology (SETT) is a new development in the petroleum industry. It consists in accomplishing hydraulic expansion of a submerged tube by propelling a mandrel through it using a differential pressure. The progress of the mandrel deforms the tube beyond its elastic limit. Towards the end of the expansion process, the mandrel pops out of the tube resulting in displacement, stress and pressure waves. A mathematical model is developed to describe the dynamics of the tube-fluid system due to the pop-out phenomenon. The model takes into consideration the effects of the coupling between fluids and structure as well as the inherent system d ing on the response. Through a specific field case, the model provides an analytical solution describing the wave propagating in the tube-fluid system and identifies the potential failure locations.
Optimizing the solar energy capture of residential roof design in the southern hemisphere through Evolutionary Algorithm
Publisher: Elsevier BV
Date: 10-2021
A multi-scaling approach to predict hydraulic damage of poromaterials
Publisher: Elsevier BV
Date: 2014
Enhancement of photocatalytic H2 production by metal complex electrostatic adsorption on TiO2 (B) nanosheets
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8TA10421B
Abstract: The assembly of cocatalysts on a semiconductor is a key way to promote the activity in solar hydrogen production.
Three-Dimensional Graphene/Metal Oxide Nanoparticle Hybrids for High-Performance Capacitive Deionization of Saline Water
Publisher: Wiley
Date: 20-08-2013
Boudinage as a material instability of elasto-visco-plastic rocks
Publisher: Elsevier BV
Date: 09-2015
Stress/fluid pressure waves in radially expanded solid tube
Publisher: ASMEDC
Date: 2004
DOI: 10.1115/PVP2004-2284
Abstract: Solid Expandable Tubular (SET) Technology is receiving a widespread use in the oil industry nowadays. This technology is essentially a down-hole cold working process consisting of expanding a solid tube by drawing a mandrel through it either mechanically or hydraulically. The hydraulic expansion requires a high back pressure to move the mandrel forward, which leads to a sudden release (pop-out) of the mandrel towards the end of the process due to the stored elastic energy within the tube-fluid system. This sudden release results in axial and radial vibrations accompanied with stress and pressure waves propagating through the three mediums (inner and outer fluids and expanded tube). In the present paper, a mathematical model describing the dynamics of the three mediums has been developed. A specific case of a 127 mm tube in a 340 mm borehole with fluids of different properties inside and outside the tube was considered. The coupling effect describing the fluid-structure interaction resulted in modifications of the waves speeds and frequencies as compared to uncoupled solutions. The study also focused on the effects of stress and fluid pressure waves on the structural integrity of the expanded tube. It was noticed that the maximum vibration occurs at the free end of the tube. In addition, the model identified potential locations along the tube, which may experience collapse.
Buckling and post-buckling analysis of geometrically non-linear composite plates exhibiting large initial imperfections
Publisher: Elsevier BV
Date: 08-2017
Long-Term Strength of Alkali-Activated Mortars with Steel Fibres Cured in Various Conditions
Publisher: MDPI AG
Date: 13-04-2020
DOI: 10.3390/JMSE8040278
Abstract: The long-term effect of extreme conditions, such as high concentrations of CO2, a combination of chloride and air, and sulfuric acid, on the performance of steel fibre reinforced alkali-activated fly ash and slag (AAFS) mortars was investigated. The selected conditions simulated the long-term exposure to the marine environment and had an influence on both the matrix and the fibres. Four AAFS mixes were analysed alongside a control ordinary Portland cement (OPC) mix. Mechanical properties such as the compressive strength, elastic moduli and ductility indices, as well as microscopic analyses were carried out. It was found that the AAFS was stable in most of the conditions. The primary way for its reduction in strength was through the neutralisation of pore fluids and the leaching of sodium cations. The addition of the short fibres could reduce the ingress of deleterious materials by limiting the development of cracks and allowing for the efficient use of higher activator ratios. The fibres were susceptible to corrosion by chloride and acid attacks. The relatively chemically stable environment of the AAFS provided protection to the embedded fibres. Based on this study, in a very aggressive environment, a combination of 1%–2% fibre by volume, with a high activator content in the AAFS mortar, could be the most suitable.
Data analysis and estimation of thermodynamic properties of aqueous monovalent metal-glycinate complexes
Publisher: Elsevier BV
Date: 2019
Coupled multi-physics and non-equilibrium thermodynamics of geo-materials
Publisher: American Society of Civil Engineers
Date: 18-06-2013
Experimental tests and design of rubberised concrete-filled double skin circular tubular short columns
Publisher: Elsevier BV
Date: 08-2018
Behaviour and design of air-cured GFRP-reinforced geopolymer concrete square columns
Publisher: Thomas Telford Ltd.
Date: 10-2019
Abstract: Conventional steel-reinforced ordinary Portland cement concrete is prone to corrosion. Geopolymer concrete is a new durable cementitious material, and the glass fibre-reinforced polymer (GFRP) is an attractive alternative to steel because of GFRP's compelling physical and mechanical properties, corrosion resistance and electromagnetic transparency. This study investigates the structural properties of 11 air-cured square geopolymer concrete columns reinforced with GFRP bars at various stirrup spacings of 50, 100 and 150 mm. The specimens were tested under varying loading conditions to generate interaction diagrams for comparison with theoretical predictions from existing codes and standards. Effective confinement and higher ductility were achieved by reducing the stirrup spacing. High strains indicating buckling or rupture of the longitudinal GFRP bars and confinement of the core were measured. The comparison between the experimental data and design codes showed that the load-carrying capacity of the columns were favourably under-predicted from a design viewpoint when the compressive GFRP bars were excluded. The strength of the concentrically loaded columns was up to 39·6% higher than the code predictions. The GFRP-reinforced geopolymer concrete columns showed a 10·8% average increment in the load-carrying capacity over their plain concrete sections.
A comparative study of Maxwell viscoelasticity at large strains and rotations
Publisher: Oxford University Press (OUP)
Date: 14-07-2017
DOI: 10.1093/GJI/GGX297
Electron highways
Publisher: Springer Science and Business Media LLC
Date: 04-06-2018
Self-consistent fractal damage of natural geo-materials in finite strain
Publisher: Elsevier BV
Date: 2017
Circular steel tubes filled with rubberised concrete under combined loading
Publisher: Elsevier BV
Date: 11-2019
Analysing the role of roof mounted BIPV system optimization on decreasing the effect of duck curve in Perth, Western Australia
Publisher: Elsevier BV
Date: 10-2021
Development of ECO-UHPC with very-low-C3A cement and ground granulated blast-furnace slag
Publisher: Elsevier BV
Date: 05-2021
Carbon-encapsulated heazlewoodite nanoparticles as highly efficient and durable electrocatalysts for oxygen evolution reactions
Publisher: Springer Science and Business Media LLC
Date: 08-06-2017
A review on methods for liberating lithium from pegmatities
Publisher: Elsevier BV
Date: 2020
Time-lapse monitoring of internal alteration of a concrete structure using ground penetrating radar
Publisher: Elsevier BV
Date: 12-2018
A parallel computing tool for large-scale simulation of massive fluid injection in thermo-poro-mechanical systems
Publisher: Informa UK Limited
Date: 07-08-2015
Ultrathin metal–organic framework nanosheets for electrocatalytic oxygen evolution
Publisher: Springer Science and Business Media LLC
Date: 28-11-2016
Facile Synthesis of Surfactant-Free Au Cluster/Graphene Hybrids for High-Performance Oxygen Reduction Reaction
Publisher: American Chemical Society (ACS)
Date: 04-09-2012
DOI: 10.1021/NN302984X
An adaptive neuro fuzzy inference system to model the uniaxial compressive strength of cemented hydraulic backfill
Publisher: Dnipro University of Technology
Date: 30-06-2018
Delithiated β−spodumene as a geopolymer precursor
Publisher: Elsevier BV
Date: 11-2021
Wellbore Path Estimation Using Measurement While Drilling Techniques: A Comparative Study and Suggestions for Improvements
Publisher: Informa UK Limited
Date: 14-08-2009
Continuum damage mechanics for the lithosphere
Publisher: American Geophysical Union (AGU)
Date: 09-04-2011
DOI: 10.1029/2010JB007501
Circular Concrete Columns and Beams Reinforced with GFRP Bars and Spirals under Axial, Eccentric, and Flexural Loading
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2020
Ultrathin Transition Metal Dichalcogenide/3d Metal Hydroxide Hybridized Nanosheets to Enhance Hydrogen Evolution Activity
Publisher: Wiley
Date: 21-05-2018
Combined mechanical and melting damage model for geomaterials
Publisher: Oxford University Press (OUP)
Date: 30-06-2014
DOI: 10.1093/GJI/GGU200
Growth of Polypyrrole Ultrathin Films on MoS2 Monolayers as High-Performance Supercapacitor Electrodes
Publisher: Wiley
Date: 22-12-2015
Image Processing and Machine Learning to investigate fibre distribution on fibre-reinforced shotcrete Round Determinate Panels
Publisher: Elsevier BV
Date: 11-2018
Stress concentration factor of expanded aluminum tubes using finite element modeling
Publisher: Sultan Qaboos University
Date: 06-2013
DOI: 10.24200/TJER.VOL10ISS1PP88-96
Abstract: This paper discusses the development of semi-empirical relations for the maximum stress concentration factor (SCF) around circular holes embedded in aluminum tubes under various expansion ratios and mandrel angles. Finite element models were developed to study the expansion of a typical aluminum tube with embedded holes of various sizes. An elastic perfectly-plastic material behaviour was used to describe the structural response of the tubes under expansion. Various hole-diameter-to-tubewall- thickness ratios, tube expansion ratios, and mandrel angles were considered to determine the stress state around the hole at zero and 90 degree locations from which the maximum SCF was determined. Semi-empirical relations for the maximum SCF using the Lagrange interpolation formulation were developed. The developed relations were found to predict the SCFs accurately.
Related Organisations
Commonwealth Scientific And Industrial Research Organisation
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Commonwealth Scientific And Industrial Research Organisation
Location: Australia
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