Read Online Chemo-Mechanical Coupling in Clays: From Nano-Scale to Engineering Applications: Proceedings of the Workshop, Maratea, 38-30 June 2001 - C Dimaio | ePub
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Mar 11, 2021 there is evidence that both chemo- and thermo- mechanical coupled processes may play a role in the stability and kinematics of clay-rich.
Materials demonstrate thermo-electro-chemo-mechanical coupling behavior and are sen- sitive to sues, clays and shales exhibit strong swelling and contrac-.
Transient analysis of ionic replacements in elastic-plastic expansive clays. Finite element simulations of chemo-mechanical coupling in elastic-plastic homoionic expansive clays.
Feb 11, 2021 abstract the transport of chemically reactive fluids through fractured clay‐rich rocks is fundamental to many subsurface engineering.
Nano-chemomechanical signature of organic-rich shales: a coupled indentation-. 1 clay packing, organic maturity, and mechanical properties of porous.
The interlaminar behavior is derived from the electro‐chemo‐mechanical coupling equilibrium of mineral crystals, and the soil skeleton behavior is given by a general elastoplastic constitutive model for soils. This modeling approach extends a general model to consider the electro‐chemo‐mechanical phenomena of mineral crystals.
Chemically active saturated clays are considered in a two-phase framework. The solid phase contains clay particles, absorbed water and a single salt.
Chemically active saturated homoionic clays are considered in a two-phase framework. The solid phase contains the clay particles, absorbed water and salt.
Chemo-mechanical coupling in saturated porous media: elastic–plastic behaviour of homoionic expansive clays.
We invite you to submit your relevant work to a mini-symposium on “damage and thermo-chemo-mechanical coupling in polymers” (full description below) at the 2020 society of engineering science. Ses 2020 will be held at the university of minnesota in minneapolis, september 28-30th.
Hydro-mechanical coupling can be either implemented in steady state simulations, or can be applied as a full transient simulation. Our simulations capture the increase in hydraulic conductivity due to the evolution of rock mass damage. They also accurately predict the developing flow paths along discontinuities at different scales.
Chemo-mechanical coupling in saturated porous media: elastic-plastic behaviour of homoionic expansive clays may 2002 international journal of solids and structures 39(10):2773-2806.
Specific review topics include the swelling of clays, the prediction of dissolution and precipitation reaction rates, co 2-induced changes in porosity and permeability, constitutive models of chemo–mechanical interactions in rock, and correlations between geochemical reactions and induced seismicity.
Various species that sorb to the clay, or desorb from it, are derived. The variation of the electrical charge of the minerals, which is a key to the electro-chemo-mechanical couplings, is addressed by the same token. These four mechanisms are seen as controlling much of the elastic and elastic-plastic behaviors of the clay mass.
We show that these properties are controlled by chemo-mechanical-chemical couplings at two key scales: a nanoscale defined by the aggregation and swelling of clay (nano)particles and a mesoscale defined by the assemblage of larger grains (bourg and ajo-franklin, 2017).
Computational modeling of chemo-electro-mechanical coupling 1105 single cell level [11, 12], little is known whether or not this knowledge translates into clinically relevant function on the organ level [13]. This knowledge gap presents a tremendous opportunity for quantitative, predictive computational modeling [14].
The rapid development in the field of chemo-mechanical coupling has drawn increasing attention in recent years.
In the context of coupled transport processes, the additional driving forces are membrane properties and chemo-mechanical coupling in clay barriers.
Thermo-chemo-mechanical interactions due to thermally activated and/or mechanically induced processes govern the constitutive behaviour of metallic alloys.
The chemo-mechanical coupling behaviour will be described within an elasto-plastic framework. Based on the test results to be obtained with this phd programme, the chemical effect on the mechanical behaviour will be introduced in the recently developed bounding surface with anisotropy model as well as classical models, including parameter.
Gajo, 2002, chemo-mechanical coupling in saturated porous media: elasto-plastic behaviour of homoionic expansive clays, international journal of solids and structures, 39, 2773-2806.
This paper presents the implementation of a numerical algorithm for a new coupled thermal–hydraulic–chemical–mechanical model for unsaturated soil. A brief treatment of the theoretical development of the coupled model is presented first, with specific attention to the multi-component chemical transport theory and its cross couplings with other primary variables.
Since chemical energies are much larger than mechanical energy accommodated in sofc, the former two types (type(1) and (2)) of chemo-mechanical coupling have been recognized as more important than the others, and have been studied intensively.
Elastic chemo-mechanical coupling is introduced through a potential, in such a way that the tangent elastic stiness is symmetric. The elastic-plastic behaviour aims at reproducing typical experimental phenomena observed on natural clays during chemical and mixed chemo-mechanical loadings, including chemical consolidation and swelling already.
Chemo-mechanical coupling in clays from nano-scale to engineering applications.
We propose a muscle chemo-mechanical model by which myosin heads - that can chemically bind to actin, thus creating so-called cross-bridges producing contraction forces in sarcomeres at the subcellular level - are considered as special chemical entities having internal mechanical variables pertaining to the actual geometric configuration.
Julio goncalves, pierre marie adler, philippe cosenza, aliaksei pazdniakou, ghislain de marsily. Semipermeable membrane properties and chemo-mechanical coupling in clay barriers.
Chemo-mechanical coupling in clays: proceedings of the workshop, maratea, 38-30 june 2001.
Bio-and chemo-mechanical processes in geotechnical engineering: géotechnique modeling of coupled chemo-hydro-mechanical processes in clays.
To analyse this question, given the complexity and the strong hydro-chemo-mechanical coupling of the processes that occur during a squeezing test, it is of interest to simulate the test using a conceptual model able to characterise the processes involved in active clays.
There is pronounced physicochemical interaction between the solid phase and fluid, rendering the clayey soil shows strong chemo-mechanical coupling effect and complex mechanical behavior. When the saturation varies from 100% to a low extreme, the composition and concentration of a pore fluid are variable.
Chemo-mechanical couplings in geomaterials have received increasing attention in recent years for a number of applications, ranging from the stability of slopes and coastal structures to geological co 2 sequestration. Chemical processes may result in strengthening or weakening effects, the latter being particularly critical for safety.
Jun 11, 2016 the paper studies localized dissolution in noncohesive soils under mineral dissolution is inherently a chemo-hydro-mechanical coupled.
Thermo-chemo-mechanical coupling in single-fluid flows through porous media.
Kerogen plays a central role in hydrocarbon generation in an oil/gas reservoir. In a subsurface environment, kerogen is constantly subjected to stress.
Elastic chemo-mechanical coupling is introduced through a potential, in such a way that the tangent poro-elasticity matrix remains symmetric. Material parameters needed to quantify the coupling are calibrated from specific experiments available in the recent literature.
Elastic chemo-mechanical coupling is introduced through a potential, in such a way that the tangent elastic stiffness is symmetric. The elastic-plastic behaviour aims at reproducing typical experimental phenomena observed on natural clays during chemical and mixed chemo-mechanical loadings, including chemical consolidation and swelling already.
Jan 15, 2021 chemo-mechanical coupling is introduced both in terms of stress variables and clay elasto-plasticity pore fluid chemistry compression curve.
Clay behaviour is affected by coupled mechanical and chemical processes occurring in them at various scales. The peculiar chemical and electro-chemical properties of clays are the source of many undesired effects. These papers provide insight into the variables controlling clay behaviour.
In this paper, we present a numerical modeling of chemo-mechanical behaviour of sandstone. An internal variable is introduced in this model for the purpose of describing ph effect on elasto-plastic properties.
Mar 13, 2021 there is evidence that both chemo- and thermo-mechanical coupled processes may play a role in the stability and kinematics of clay-rich.
May 1, 2020 a new stabilized method is presented for coupled chemo-mechanical problems involving chemically reacting fluids flowing through deformable.
Semipermeable membrane properties and chemo-mechanical coupling in clay barriers by julio goncalves, pierre marie adler, philippe cosenza, aliaksei pazdniakou and ghislain de marsily abstract.
Experiment study of chemo-mechanical coupling behavior of leached concrete.
Oct 22, 2020 mechanistic picture for chemo-mechanical couplings in a bacterial proton- coupled oligopeptide transporter from streptococcus thermophilus.
3c), which outcrop extensively in the bradano trough, geotechnical properties and chemo-mechanical coupling processes.
Irrespective of the simulated case or the underlying hypotheses, the geochemical transformations remain located very close to the cement/clay interface. During the last decade, numerous studies have focused on long-term predictive reactive transport modelling of cement/clay interactions.
The stress profiles differ in the two geometries but both affect the lithiation process more than the delithiation process. The overall delithiation capacity is affected very little by the chemo-mechanical coupling.
Saturated clay is viewed as a porous deformable continuum consisting of two overlapping phases, each phase containing several species. Phase identification follows a kinematic criterion and attributes the absorbed water to the solid phase based on the affinity of their velocities, hueckel [1992].
Phase-field modeling of chemo-mechanical coupling in aqueous corrosion and high temperature gas-phase oxidation of metals san-qiang shi 1(*), chen lin 2, haihui ruan 1 1department of mechanical engineering, the hong kong polytechnic university, hong kong, china 2school of aerospace engineering, xi’an jiaotong university, xi’an, china.
The book addresses fundamental issues faced by experimentalists, modelers and engineers interested in different physical, mechanical and transport aspects of biological tissues and chemically active geological materials, mainly clays and shales.
Clay behaviour: chemo-mechanical coupling from nano-structure to engineering applications.
Chemo-mechanical couplings in compacted argillite submitted to high-ph environment more by olivier cuisinier in the french concept of deep nuclear wastes repository, the galleries should be backfilled with excavated argillite after the site exploitation period.
The heme importer from pathogenic bacteria is a member of the atp-binding cassette (abc) transporter family, which uses the energy of atp-binding and hydrolysis for extensive conformational changes. Previous studies have indicated that conformational changes after heme translocation are triggered by atp-binding to nucleotide binding domains (nbds) and then, in turn, induce conformational.
A constitutive model was proposed to describe the observed behaviour of lime treated soils in the framework of the structured cam clay. The model accounts for the modifications on the mechanical parameters of the soil. A chemo-mechanical coupling was established between the yield stress and the mass concentration in cementitious compounds.
Chemo-mechanical coupling and pore-size evolution in many situations geochemical and mechanical compaction do not act independently of each other, but rather act in concert, and the two approaches developed in the previous sections can be integrated to yield a single expression for the evolution of pore-size distributions.
Material pa-rameters needed to quantify the coupling are calibrated from specific experiments available in the recent literature. The elasto-plastic behaviour aims at reproducing qualitatively and quantitatively the typical experimental responses ob-served on almost pure na-montmorillonite clays during chemical and mixed chemo-mechanical loadings.
Chemo-mechanical behaviour of homoionic expansive clays is simulated through a three-dimensional constitutive model that can be viewed as an extension of classic elasto-plastic framework for saturated porous media to account for chemo-mechanical coupling, through the introduction of new, generalised stresses and strains.
Oct 14, 2020 electro-chemo-mechanical couplings in swelling clays.
Hydro-chemo-mechanical modeling of swelling clays for closure of nuclear waste repositories. Coupled hydro-mechanical-chemical numerical modeling to simulate the long-term behavior and performance assessment of closure systems of the future geological disposal facility cigéo for radioactive waste disposal in france.
Title chemo-mechanical interactions in clay: a correlation between clay mineralogy and atterberg limits.
In this paper a conceptual elastoplastic model is developed for describing the chemo-mechanical behaviour of chalk based on the framework of the modified cam clay model. Central to the model is the concept of intergranular stresses, introduced as the substitute for terzaghi's effective stress to describe the chalk behaviour.
Humboldt manufactures construction materials testing equipment for use with soil, concrete, cement and asphalt materials. Humboldt has geotechnical and soil mechanics equipment like triaxial, consolidation and direct shear involving astm standards.
Chemo-mechanical-flow coupling occurs in fine-grained materials (clays, shales) with high surface area when changes in water chemistry leads to volume changes, permeability changes, effective stress changes,.
Electro-chemo-mechanical coupling phenomena in geomechanics and biomechanics some chemically sensitive clays undergo swelling: this is a well-known fact to soil mechanicians. There has been interest in modeling parts of this phenomenon in the sixties and seventies, but failure.
Clay behaviour is affected by coupled mechanical and chemical processes occurring in them at various scales. The peculiar chemical and electro-chemical uh-oh, it looks like your internet explorer is out of date.
Thermo-chemo-mechanical coupling during thermomechanical processing of microalloyed steels (tcmprecipsteel) thermo-chemo-mechanical interactions due to thermally activated and/or mechanically induced processes govern the constitutive behaviour of metallic alloys during production and in service.
Chemo-mechanical coupling in saturated porous media: elastic–plastic behaviour of homoionic expansive clays. International journal of solids and structures 2002 39 (10) 2773-2806.
If you have too much clay in a glaze recipe, you might have issues with your glaze crawling during the firing.
A new chemo-hydro-mechanical model for unsaturated clays is under development. By adopting simple assumptions concerning the coupling between.
Environmental geotechnics involves several engineering applications (such as the salinification of groundwater and the storage of nuclear wastes) for which a deep understanding of the chemo-mechanical behaviour of soils is a fundamental component. Despite the vast number of situations in which couplings between chemistry and mechanics occur, the available experimental results are quite limited.
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