Tomasz Hueckel

Journal article Geomechanics for Energy and the Environment · September 1, 2023 This paper extends the experimental results of our companion paper by modeling and predicting the onset and pattern formation of desiccation cracks in geomaterials (Ruoyu et al., 2023). Thin-layer silt samples in controlled atmospheric conditions were test ... Full text Cite

The physics of desiccation cracks 1: Ductile fracturing and dependence on relative humidity

Journal article Geomechanics for Energy and the Environment · September 1, 2023 Ductile deformation is ubiquitously found in the shrinkage of geomaterials. The existence of ductility requires elastoplastic mechanics when analyzing the structure deformation under external stress. In this work, we explore the physics of ductile fracturi ... Full text Cite

Capillary Water in 2-D Drying—Cracking Sub-Grain Scale Soil Models: Dynamics and Instabilities of Haines Jumps

Journal article Water Resources Research · November 1, 2022 Changes in capillary water morphology in a cluster of three wet long cylindrical grains as reported in Mielniczuk and Hueckel (2022, https://doi.org/10.1029/2022wr031938) affect capillary forces evolving during drying. The paper focuses on a stable motion ... Full text Cite

Capillary Water in 2-D Drying-Cracking Soil Sub-Grain Models: Morphology and Kinematics of Evaporation and Haines Jumps

Journal article Water Resources Research · September 1, 2022 Morphing of capillary water during the drying of a cluster of three wet grains is imaged and measured. The uniqueness of the tests is in the grains being long cylinders to make the system as close to a 2-D one as possible. In this way, the Laplace pressure ... Full text Cite

Geomechanics for energy and the environment

Journal article Geomechanics for Energy and the Environment · June 1, 2022 Full text Cite

Life Expectancy of Evaporating Capillary Bridges Predicted by Tertiary Creep Modeling

Journal article Frontiers in Mechanical Engineering · April 7, 2022 The evaporation of capillary bridges is experimentally investigated at the microscale through a three-grain capillary cluster. This setting provides the minimum viable description of Haines jumps during evaporation, that is, capillary instabilities stemmin ... Full text Cite

The mechanics of air entry of drying-cracking soils: Physical models

Journal article Computers and Geotechnics · August 1, 2021 Because of common exposure to high temperatures and forced ventilation of geomaterials in energy production and storage, failure mode of these materials often involves intense drying and constrained shrinkage associated cracking. Previous experiments show ... Full text Cite

Adhesion-force micro-scale study of desiccating granular material

Journal article Geotechnique · December 1, 2020 Experiments on five-, four-, three- and two-wet-hydrophilic-grain clusters were performed to investigate evolution of adhesion of granular media during drying on the micro-scale. The experiments show that the adhesion-force of a cluster initially grows at ... Full text Cite

Modeling of subcritical cracking in acidized carbonate rocks via coupled chemo-elasticity

Journal article Geomechanics for Energy and the Environment · September 1, 2019 Injection of acidized water into the crack process area has been known for long to induce subcritical crack propagation. Acid rain or vegetation decomposition can cause activation or reactivation of landslides at subcritical stress, while acid injection is ... Full text Cite

Chemo-mechanical modeling of artificially and naturally bonded soils

Journal article Geomechanics for Energy and the Environment · June 1, 2019 Chemo-mechanical effects are known to be significant in a number of applications in modern geomechanics, ranging from slope stability assessment to soil improvement and CO2 sequestration. This work focuses on coupled chemo-mechanical modeling of bonded geo ... Full text Cite

Thermodynamic Relations among Isotropic Material Properties in Conditions of Plane Shear Stress.

Journal article Entropy (Basel, Switzerland) · March 2019 We present new general relationships among the material properties of an isotropic material kept in homogeneous stress conditions with hydrostatic pressure and plane shear. The derivation is not limited to the proximity of the zero shear-stress and -strain ... Full text Cite

A note on evolution of pressure and flow within an evaporating capillary bridge.

Journal article The European physical journal. E, Soft matter · December 2018 Experiments with evaporation of capillary bridges between two glass spheres show that the bridge gorge radius decreases much faster than the contact radius, distorting the original constant mean curvature bridge shape. In addition, the Laplace pressure cal ... Full text Cite

A strain-rate-dependent modified Cam-Clay model for the simulation of soil/rock compaction

Journal article Geomechanics for Energy and the Environment · September 1, 2017 This paper presents a new geomechanical constitutive model that describes the response of deep sediments to increased effective stress, as generated for instance by hydrocarbon or water extraction from the subsurface. The model has the capability of repres ... Full text Cite

Citations of papers in Geomechanics for Energy and the Environment are going up - Editorial

Journal article Geomechanics for Energy and the Environment · September 1, 2017 Full text Cite

Citations of papers in Geomechanics for Energy and the Environment are going up - Editorial

Journal article Geomechanics for Energy and the Environment · September 1, 2017 Full text Cite

Editorial

Journal article Geomechanics for Energy and the Environment · March 1, 2017 Full text Cite

HYSTERESIS BEHAVIOUR OF SOILS AND ROCKS.

Journal article Transactions of the International Conference on Structural Mechanics in Reactor Technology · January 1, 2017 A theory of mechanical hysteresis of geological materials under alternating loading within the yield locus is studied, with emphasis on isotropic pressure sensitivity effects. Specialization to conventional triaxial tests is considered. The feasibility of ... Cite

Microbially induced calcite precipitation effect on soil thermal conductivity

Journal article Geotechnique Letters · 2016 Full text Open Access Cite

A micro-scale inspired chemo-mechanical model of bonded geomaterials

Journal article International Journal of Rock Mechanics and Mining Sciences · December 1, 2015 Chemical processes influence the mechanical properties of geomaterials, resulting in either strengthening or weakening effects, the latter being particularly critical for long-term safety assessment in civil and energy engineering. Coupling of chemical and ... Full text Open Access Cite

Laplace pressure evolution and four instabilities in evaporating two-grain liquid bridges

Journal article Powder Technology · October 1, 2015 Dynamic variables characterizing evolution during evaporation of capillary bridge between two spheres are analyzed. The variables include: average Laplace pressure, pressure resulting force, surface tension force and total capillary force calculated based ... Full text Open Access Cite

Efects of mineral suspension and dissolution on strength and compressibility of soft carbonate rocks

Journal article Engineering Geology · January 4, 2015 Calcarenites are highly porous soft rocks formed of mainly carbonate grains bonded together by calcite bridges. The above characteristics make them prone to water-induced weathering, frequently featuring large caverns and inland natural underground cavitie ... Full text Open Access Cite

Silica polymer bonding of stressed silica grains: An early growth of intergranular tensile strength

Journal article Geomechanics for Energy and the Environment · January 1, 2015 Laboratory tests on microscale are reported in which millimeter-sized amorphous silica cubes were kept highly compressed in a liquid environment of de-ionized water solutions with different silica ion concentrations for up to four weeks. Such an arrangemen ... Full text Open Access Cite

Geomechanics for energy and the environment has its own publishing outlet - Editorial

Journal article Geomechanics for Energy and the Environment · January 1, 2015 Full text Cite

Evaporation-induced evolution of the capillary force between two grains

Journal article Granular Matter · September 30, 2014 The evolution of capillary forces during evaporation and the corresponding changes in the geometrical characteristics of liquid (water) bridges between two glass spheres with constant separation are examined experimentally. For comparison, the liquid bridg ... Full text Open Access Cite

A three-scale cracking criterion for drying soils

Journal article Acta Geophysica · 2014 Cite

Multi-scale study of desiccation shrinkage in granular soils

Journal article Unsaturated Soils Research and Applications Proceedings of the 6th International Conference on Unsaturated Soils Unsat 2014 · January 1, 2014 This paper aims to identify and evaluate various critical mechanisms associated with the processes of desiccation shrinkage in drying silty soils. A previously developed 1D bundle-of-tubes model is refined to simulate the various stages of drying shrinkage ... Cite

Multi-scale approach for modeling desiccation shrinkage in granular soils

Journal article Geotechnical Special Publication · January 1, 2014 This paper aims to identify and quantitatively evaluate various critical mechanisms associated with the processes of desiccation shrinkage and cracking in drying, silty soils. A previously developed 1D bundle-of-tubes model is refined to simulate the vario ... Full text Cite

Rupture of an evaporating liquid bridge between two grains

Journal article Acta Geophysica · 2014 Cite

A three-scale cracking criterion for drying soils

Journal article Acta Geophysica · January 1, 2014 Cracking is a most unwanted development in soil structures undergoing periodic drying and wetting. Desiccation cracks arise in an apparent absence of external forces. Hence, either an internal, self-equilibrated stress pattern resulting from kinematic inco ... Full text Cite

Rupture of an evaporating liquid bridge between two grains

Journal article Acta Geophysica · January 1, 2014 The study examines rupture of evaporating liquid bridges between two glass spheres. Evolution of the bridge profile has been recorded with the use of high-speed camera. Geometrical characteristics of the bridge were then used to calculate evolution of the ... Full text Cite

Subcritical crack propagation enhanced by chemical injection

Journal article Shale Energy Engineering 2014 Technical Challenges Environmental Issues and Public Policy Proceedings of the 2014 Shale Energy Engineering Conference · January 1, 2014 This paper studies the conditions of crack propagation in a subcritically stressed rock subject to chemically aggressive environment, which is often encountered in technologies of oil/gas extraction from low-permeability reservoirs. Frequently, matrix acid ... Full text Cite

Multi-scale Characterization of Coupling Mechanisms for Evolving Permeability in Oil/Gas Bearing Sediments Compaction

Journal article Geotechnical and Geological Engineering · December 1, 2013 A proper understanding and eventual assessment of reservoir compaction and land subsidence is crucial for decision-making in petroleum and gas extraction industry. This paper presents a multi-scale multi-physics study of coupling mechanisms in the long-ter ... Full text Cite

Desiccation shrinkage of non-clayey soils: A numerical study

Journal article International Journal for Numerical and Analytical Methods in Geomechanics · August 25, 2013 A mesoscale model of desiccation of soil based on the evolution of the pore system idealized as bimodal is numerically examined. A simplified evolution of the model reveals a series of characteristics that qualitatively agree with the observed macroscopic ... Full text Cite

Desiccation shrinkage of non-clayey soils: Multiphysics mechanisms and a microstructural model

Journal article International Journal for Numerical and Analytical Methods in Geomechanics · August 25, 2013 Analysis of macroscopic desiccation shrinkage experiments indicates that most, but not all of the shrinkage during drying occurs while soil is still saturated. Shrinkage practically ceases and air starts to penetrate the soil, when the water content is sti ... Full text Cite

Weathering of submerged stressed calcarenites: Chemo-mechanical coupling mechanisms

Journal article Geotechnique · July 1, 2013 Long portions of the Apulian coast are steep cliffs in carbonate soft rocks. These, especially the calcarenite, are affected by weathering processes that markedly alter their mechanical properties with time, potentially leading to instability of coastal ge ... Full text Cite

Mechanisms and critical properties in drying shrinkage of soils: Experimental and numerical parametric studies

Journal article Canadian Geotechnical Journal · May 1, 2013 Mechanisms of free-shrinkage strains of desiccating deformable initially saturated soils are studied. The role of the surface evaporation rate, surface tension and viscosity of pore fluid, and soil compressibility and permeability is investigated in experi ... Full text Cite

Formation of drying crack patterns in soils: A deterministic approach

Journal article Acta Geotechnica · April 1, 2013 Soils, as well as most of deformable multiphase porous materials, are likely to suffer from desiccation cracking, leading to the formation of regular crack patterns affecting their permeability. The ensuing crack spacing has often been related to a concept ... Full text Cite

Desiccation Cracking of Soils

Journal article · March 7, 2013 Full text Cite

Environmentally enhanced crack propagation in a chemically degrading isotropic shale

Journal article Geotechnique · March 1, 2013 Crack propagation is studied in a geomaterial subject to weakening by the presence of water, which dissolves a mineral component. Such weakening is common when tensile microcracks develop, constituting sites of enhanced mineral dissolution. A previous conc ... Full text Cite

Growth of polymer microstructures between stressed silica grains: A chemo-mechanical coupling

Journal article Geotechnique · March 1, 2013 Laboratory tests on the micro scale are reported in which two amorphous silica cubes were compressed in a liquid environment, in solutions with different silica ion concentrations, for up to 3 weeks. Such an arrangement represents an idealised representati ... Full text Cite

Micro-scale study of rupture in desiccating granular media

Journal article Geotechnical Special Publication · January 1, 2013 Capillary bridges between two, three, and multiple fixed glass spheres are examined experimentally during their natural evaporation. The key variables of the process of evolution are measured using a calibrated balance recording and digital image processin ... Full text Cite

Multi-scale approach to cracking criteria for drying silty soils

Journal article Geotechnical Special Publication · January 1, 2013 Cracking is a most unwanted development in soil structures undergoing periodic drying. Desiccation cracking arises in the apparent absence of external forces. Hence, either an internal, self equilibrated stress pattern resulting from kinematic incompatibil ... Full text Cite

Multi-scale Characterization of Coupling Mechanisms for Evolving Permeability in Oil/Gas Bearing Sediments Compaction

Journal article Geotechnical and Geological Engineering · 2013 Cite

Experimental methodology for chemo-mechanical weathering of calcarenites

Journal article Springer Series in Geomechanics and Geoengineering · January 1, 2013 Calcarenite is a soft rock strongly affected by weathering processes that markedly reduce the mechanical rock properties with time. As a consequence, cliffs and underground cavities formed in calcaernites are frequently affected by intense erosion and inst ... Full text Cite

Micro-scale testing of capillary bridge evolution due to evaporation

Journal article Springer Series in Geomechanics and Geoengineering · January 1, 2013 Capillary bridge evolution between two fixed glass spheres during its natural convective evaporation is examined experimentally. For comparison extension tests were also carried out. The calibrated balance recording and digital image processing allow monit ... Full text Cite

Coupled chemo-mechanics of evolving permeability in geomaterials

Journal article Computational Geomechanics Comgeo II Proceedings of the 2nd International Symposium on Computational Geomechanics · September 1, 2011 Flow of fluids in geomaterials may be strongly affected by chemo-mechanical processes, which are either externally induced or spontaneous. This is the case when dissolution, transport of the dissolved mineral and its precipitation in the neighborhood pore ... Cite

Thermal variability of the internal friction in clay in a cylindrical thermo-mechanical problem

Journal article Computational Geomechanics Comgeo II Proceedings of the 2nd International Symposium on Computational Geomechanics · September 1, 2011 Variability of the internal friction angle with temperature is studied in a boundary value problem numerically simulating the impact of a cylindrical heat source on the stress and strain in soil mass in which it is emplaced. Even if the thermal increase of ... Cite

A multi-scale multi-physics model of soil drying

Journal article Geotechnical Special Publication · May 27, 2011 Drying shrinkage is modeled at a microscale as a two-stage process of deformation and evacuation of a two-tube vessel system, based on porosimetry evolution. In the first stage water flow is driven by an external evaporation flux. Flow is associated with a ... Full text Cite

Temperature-dependent internal friction of clay in a cylindrical heat source problem

Journal article Geotechnique · January 1, 2011 The effect of the temperature dependence of the internal friction angle is studied in a boundary value problem simulating the impact of a cylindrical heat source on the soil mass in which it is embedded. This follows a previous study which shows that such ... Full text Cite

Multi-scale chemo-mechanical analysis of the slip surface of landslides in the Three Gorges, China

Journal article Science China Technological Sciences · January 1, 2011 Multi-scale chemo-mechanical effects and microscopic failure modes are explored in the evolution of strength change of slip surface. Direct shear equipments, scanning electro-microscope and X-ray diffraction are used to trace the change in strength of remo ... Full text Cite

Prediction of the spacing and patterns of drying cracks in soils

Journal article Computational Geomechanics Comgeo I Proceedings of the 1st International Symposium on Computational Geomechanics · December 1, 2009 Desiccation cracking of soils is of great importance to geotechnical and geoenvironmental engineering as it affects the soil physical integrity. Yet the mechanisms of drying cracking in soils, and the ways to control or avoid it, are still elusive. This pa ... Cite

Implications of thermal sensitivity of the static internal friction angle

Journal article Computational Geomechanics Comgeo I Proceedings of the 1st International Symposium on Computational Geomechanics · December 1, 2009 Thermal variability of the coefficient of the critical state, or the angle of internal friction is examined in view of experimental results obtained for clays and hard rocks. This sensitivity has several implications for the evolution of what is considered ... Cite

Fundamentals of desiccation cracking of fine-grained soils: Experimental characterisation and mechanisms identification

Journal article Canadian Geotechnical Journal · October 1, 2009 This paper presents the results of a comprehensive experimental study of the desiccation of fine-grained soils. Air drying of initially saturated soil slabs in controlled conditions is investigated by performing three kinds of tests: free desiccation tests ... Full text Cite

Explaining thermal failure in saturated clays

Journal article Geotechnique · August 5, 2009 Failure conditions in soils at elevated temperatures appear to be strongly dependent on the history of the application of stress and temperature. Four cases of such history leading to various modes of failure are identified and interpreted in terms of ther ... Full text Cite

Feedback mechanisms in chemo-mechanical multi-scale modeling of soil and sediment compaction

Journal article Computers and Geotechnics · July 1, 2009 Geomaterials respond to some environmental circumstances through generation of a series of feedback mechanisms of damage, deformation, erosion, and chemical processes or reactions: e.g. osmosis, dissolution and precipitation, mineral transformations. These ... Full text Cite

Explaining thermal failure in saturated clays

Journal article Geotechnique · April 2009 Cite

Thermally and chemically induced failure in geomaterials

Journal article European Journal of Environmental and Civil Engineering · January 1, 2009 Failure conditions in soils occurring during or as a result of heating or by altering their chemical environment appear to be strongly dependent on the history of the application of stress and temperature and or the chemical change. Several cases of such h ... Full text Cite

Desiccation cracking of soils

Journal article European Journal of Environmental and Civil Engineering · January 1, 2009 The scope of this paper is to present the global mechanisms of soil desiccation, including drying shrinkage and cracking. The paper first reviews the basic processes that are beneath the word “desiccation”. Then the results of an experimental study of desi ... Full text Cite

Desiccation shrinkage of unconstrained soil in the saturated phase

Journal article Unsaturated Soils Advances in Geo Engineering Proceedings of the 1st European Conference on Unsaturated Soils E Unsat 2008 · December 1, 2008 Analysis of macroscopic desiccation shrinkage experiments indicates that most of the shrinkage occurs during drying while soil is still 100% wet. When air starts penetrating the soil, shrinkage practically ceases, while the water content is still above 20% ... Cite

Modeling evaporation, shrinkage and cracking of desiccating soils

Journal article 12th International Conference on Computer Methods and Advances in Geomechanics 2008 · December 1, 2008 Room temperature drying tests on silt slurry with free and constrained boundaries, reveal an initial phase with a significant shrinkage at full saturation. Hence, this shrinkage is linked to a mass loss of pore fluid through the external boundary. Shrinkag ... Cite

Creep of saturated materials as a chemically enhanced rate-dependent damage process

Journal article International Journal for Numerical and Analytical Methods in Geomechanics · December 10, 2007 Material behaviour that exhibits characteristics of creep induced by a spontaneous mineral dissolution enhanced by material damage is studied. It is believed that the characteristic rates of the chemical processes involved determine the time-rate dependenc ... Full text Cite

Mechanisms of desiccation cracking of soil: Validation

Journal article Proceedings of the 10th International Symposium on Numerical Models in Geomechanics NUMOG 10 Numerical Models in Geomechanics NUMOG 10 · December 1, 2007 Mechanisms of shrinkage and the conditions leading to cracking of drying soils are addressed. An elastic formulation of the hydro-mechanical drying problem is presented. It relies on the analogy which can be drawn between the desiccation process and thermo ... Cite

Drying shrinkage of deformable porous media: Mechanisms induced by the fluid removal

Journal article Geotechnical Special Publication · September 6, 2007 Mechanisms of free shrinkage strains of desiccating deformable porous media are studied. The roles of surface evaporation rate, surface tension, and viscosity of pore fluid, soil compressibility and permeability are investigated. For drying tests on two ge ... Full text Cite

Special Issue on Chemo-Mechanical Interaction in Geomaterials

Journal article Computers and Geotechnics · July 1, 2007 Full text Cite

Coupled chemo-mechanics of intergranular contact: Toward a three-scale model

Journal article Computers and Geotechnics · July 1, 2007 Mineral dissolution in the vicinity of a stressed grain contact undergoing irreversible damage strain is studied numerically at three scales: of a grain, grain assembly and macroscopic continuum. Rigid chemo-plasticity is used to simulate the phenomena in ... Full text Cite

An improved volume measurement for determining soil water retention curves

Journal article Geotechnical Testing Journal · January 1, 2007 The complete determination of soil water retention curves requires the sample volume to be measured in order to calculate its void ratio and degree of saturation. During drying in the pressure plate apparatus, cracks often appear in the sample altering its ... Cite

Experimental study of desiccation of soil

Journal article Geotechnical Special Publication · December 21, 2006 Basic phenomena involved in crack generation during drying, and the ways to control or avoid it, are still elusive. Mechanisms of shrinkage and cracking are addressed, and especially the critical role in crack onset during drying of boundary constraints an ... Full text Cite

Numerical and phenomenological study of desiccation of soil

Journal article Geotechnical Special Publication · December 18, 2006 Desiccation cracks are assumed to be the consequence of an excess of tensile stresses induced by shrinkage of the drying body with a constrained kinematics. Free and constrained desiccation shrinking tests on silt samples are compared and simulated using l ... Full text Cite

An Improved Volume Measurement for Determining Soil Water Retention Curves

Journal article Geotechnical Testing Journal · July 10, 2006 The complete determination of soil water retention curves requires the sample volume to be measured in order to calculate its void ratio and degree of saturation. During drying in the pressure plate apparatus, cracks often appear in the sample altering its ... Full text Cite

Modelling chemo-hydro-mechanical behaviour of unsaturated clays: A feasibility study

Journal article International Journal for Numerical and Analytical Methods in Geomechanics · 2005 Effective capabilities of combined chemo-elasto-plastic and unsaturated soil models to simulate chemo-hydro-mechanical (CHM) behaviour of clays are examined in numerical simulations through selected boundary value problems. The objective is to investigate ... Full text Link to item Cite

Modelling contamination of clays

Journal article · January 1, 2004 A constitutive model for the behaviour of clays in contact with organic liquids is presented. The model was originally proposed by Hueckel (1997), based on experimental data reported by Fernandez and Quigley (1985,1991). It is recognized that the physico-c ... Full text Cite

Electro-chemo-mechanical couplings in saturated porous media: Elastic-plastic behaviour of heteroionic expansive clays

Journal article International Journal of Solids and Structures · August 19, 2002 Chemically active saturated clays containing several cations are considered in a two-phase framework. The solid phase contains the negatively charged clay particles, absorbed water and ions. The fluid phase, or pore water, contains free water and ions. Ele ... Full text Cite

Chemo-mechanical coupling in saturated porous media: Elastic-plastic behaviour of homoionic expansive clays

Journal article International Journal of Solids and Structures · May 21, 2002 Chemically active saturated homoionic clays are considered in a two-phase framework. The solid phase contains the clay particles, absorbed water and salt. The fluid phase, or pore water, contains free water and salt. Water, and possibly salt, can transfer ... Full text Cite

Reactive plasticity for clays: Application to a natural analog of longterm geomechanical effects of nuclear waste disposal

Journal article Engineering Geology · May 1, 2002 Long-term changes in mechanical properties of clays induced by heating are investigated based on findings at Orciatico site of natural analog of nuclear waste disposal. To quantify the extent of such changes, a chemo-thermo-plastic model for illitization a ... Full text Cite

Reactive plasticity for clays during dehydration and rehydration. Part 1: Concepts and options

Journal article International Journal of Plasticity · March 4, 2002 A mixture theory framework is adapted to analyze the effects of changes in clay chemistry during dehydration and rehydration on clay mechanical properties. Macroscopic and microscopic evidence points to a possibility of modeling the mineralogical processes ... Full text Cite

Aging of oil/gas-bearing sediments, their compressibility, and subsidence

Journal article Journal of Geotechnical and Geoenvironmental Engineering · 2001 The in situ stiffness and apparent maximum preconsolidation stress of many soils and sediments appear to be higher than in the laboratory tests. We seek to verify experimentally whether this also holds for deep marine sediments. We also discuss an alternat ... Full text Link to item Cite

A constitutive study of thermo‐elasto‐plasticity of deep carbonatic clays

Journal article International Journal for Numerical and Analytical Methods in Geomechanics · July 1998 Full text Cite

Chemo-Mechanical Consolidation of Clays: Analytical Solutions for a Linearized One-Dimensional Problem

Journal article Transport in Porous Media · January 1, 1998 Consolidation (and swelling) of clayey soils caused by change in chemistry of pore fluid is addressed. Such phenomena are caused by changes in the concentration of various species in the solution and result primarily from a stress-independent deformation o ... Full text Cite

Constitutive study of thermo-elasto-plasticity of deep carbonatic clays

Journal article International Journal for Numerical and Analytical Methods in Geomechanics · 1998 Argillaceous masses considered for potential nuclear waste repositories may exhibit significant space variability in their carbonate content. This may affect mechanical clay properties, such as strength or maximum apparent preconsolidation stress known to ... Full text Link to item Cite

Use of porosity in models of consolidation

Journal article Journal of Engineering Mechanics · January 1, 1998 Porosity is a fundamental variable used in the small strain theory of consolidation to measure the volume of the pore space in the volume of soil. It is defined as a ratio of the two variables, as opposed to volumetric strain, which measures the change in ... Full text Cite

Transport Through a Clay Barrier with the Contaminant Concentration Dependent Permeability

Journal article Transport in Porous Media · January 1, 1997 Transport of contaminants through clays is characterized by a very low dispersivity, but depends on the sensitivity of its intrinsic permeability to the contaminant's concentration. An additional constitutive relationship for a variable intrinsic permeabil ... Full text Cite

Chemo-plasticity of clays subjected to stress and flow of a single contaminant

Journal article International Journal for Numerical and Analytical Methods in Geomechanics · January 1, 1997 Isothermal chemo-elasto-plasticity of clays is discussed, to describe strains induced in clay by permeation of it with a low dielectric constant organic contaminant, in the presence of stress. The strain is crucial in controlling permeability changes in ch ... Full text Cite

Theoretical assessment of fabric and permeability changes in clays affected by organic contaminants

Journal article Canadian Geotechnical Journal · January 1, 1997 Permeability of clay is known, from laboratory tests, to increase over four orders of magnitude during low effective stress permeation with some concentrated organic liquids. On an engineering scale, in a one-dimensional purely advective flow through a fin ... Full text Cite

Thermomechanics of clays and clay barriers, 3rd international workshop on clay barriers, ISMES, Bergamo, Italy, October 22-24, 1993 - introduction

Journal article Engineering Geology · January 1, 1996 The international workshop organized at ISMES, in Bergamo, Italy in October 1993 has been the third of such workshops which are geared towards understanding the thermo-mechanical behavior of clay formations. The workshop tackled the following specific subj ... Full text Cite

Critical issues in modelling the long-term hydro-thermomechanical performance of natural clay barriers

Journal article Engineering Geology · January 1, 1996 Performance assessment of deep repositories for heat-generating radioactive waste requires the capability of predicting reliably the evolution of the system during a time period commensurate with the hazardous life of the waste. In many repository designs ... Full text Cite

A note on thermomechanical anisotropy of clays

Journal article Engineering Geology · January 1, 1996 Deep clays exhibit a pronounced strain anisotropy both during mechanical loading as well as during heating and cooling at constant stress in drained isotropic conditions. During mechanical loading vertical strain is larger than the horizontal one. During h ... Full text Cite

Thermomechanical properties of deep argillaceous formations

Journal article Engineering Geology · January 1, 1996 A difficulty in the interpretation of mechanical and thermo-mechanical tests on specimens drawn from large argillaceous formations is the strong inhomogeneity of void ratio, clay minerals and carbonates content. In this paper a relationship is developed to ... Full text Cite

A constitutive law for thermo-plastic behaviour of rocks: an analogy with clays

Journal article Surveys in Geophysics · September 1, 1994 Thermo-mechanical behaviour of rocks shows phenomenological similarities to that of clays. A visible decrease of strength and an increase in ductility at elevated temperatures are observed in drained conditions. In undrained conditions the strength decreas ... Full text Cite

A thermo-plastic constitutive law for brittle-plastic behavior of rocks at high temperatures

Journal article Pure and Applied Geophysics Pageoph · March 1, 1994 Mechanical properties of rocks change under the influence of, temperature. Stress at the onset of yielding, ultimate strength, dilatancy, strain hardening and softening, and the confining pressure at brittle-ductile transition are all reduced by the increa ... Full text Cite

Modeling of elastic anisotropy due to one-dimensional plastic consolidation of clays

Journal article Computers and Geotechnics · January 1, 1994 Experiments indicate that in one-dimensionally consolidated natural clays the elastic anisotropy is much stronger than the plastic strain anisotropy. Moreover, the elastic anisotropy appears to be dependent on the pre-consolidation strain. Coupled elasto-p ... Full text Cite

Thermomechanical effects on adsorbed water in clays around a heat source

Journal article International Journal for Numerical and Analytical Methods in Geomechanics · January 1, 1993 Numerical results of the simulations of the saturated clay response to a line heat source with a constant power output are presented and compared to the analytical solutions. Mixture theory of two interacting thermoelastic constituents is employed for the ... Full text Cite

Effects of inter-phase mass transfer in heated clays: A mixture theory

Journal article International Journal of Engineering Science · January 1, 1992 Saturated clay soils consist of an assemblage of clusters of platelets which with other non-clayey particles form the soil matrix with voids filled with water. Electro-chemical forces attract water firmly to the clay platelets, forming a water layer which ... Full text Cite

A note on non‐linear elasticity of isotropic overconsolidated clays

Journal article International Journal for Numerical and Analytical Methods in Geomechanics · January 1, 1992 An empirically established rule of Wroth1 for the dependence of the shear modulus on the mean effective pressure and the overconsolidation ratio in clays is investigated within the framework of non‐linear elasticity. The resulting isotropic‐devi ... Full text Cite

Water-mineral interaction in hygromechanics of clays exposed to environmental loads: a mixture-theory approach

Journal article Canadian Geotechnical Journal · January 1, 1992 Water-mineral interaction in narrow interstices in dense, saturated clays is discussed in view of recent experimental findings and molecular dynamics simulations. A mixture theory for two interacting constituents is developed. Effects of temperature and ch ... Full text Cite

Stress and pore pressure in saturated clay subjected to heat from radioactive waste: a numerical simulation

Journal article Canadian Geotechnical Journal · January 1, 1992 Some effects of temperature increase due to the emplacement of radioactive waste on the mechanical and hydraulic behavior of saturated clays are studied numerically. A mass-transfer model is adopted which simulates a possible degeneration of adsorbed water ... Full text Cite

Effective stress and water pressure in saturated clays during heating-cooling cycles

Journal article Canadian Geotechnical Journal · January 1, 1992 Experiments with heating and cooling cycles in undrained constant total stress conditions in triaxial apparatus are presented. Heating induces a large pore-water pressure increase, which eventually leads to a large irreversible strain and possible mechanic ... Full text Cite

Damping, cyclic strain buildup and fatigue of rocks a generalized Ramberg-Osgood approach

Journal article Computers and Geotechnics · January 1, 1991 A generalization of the Ramberg-Osgood model three dimensional cyclic loading was formulated for rocks in the previous paper [1] using discretized kinematic hardening concepts. Here, material functions are interpreted and calibrated. Perfect hysteresis, cy ... Full text Cite

Thermoplastic modeling of undrained failure of saturated clay due to heating

Journal article Soils and Foundations · January 1, 1991 This paper is concerned with modeling of thermomechanical failure of triaxial specimens of saturated clays of low porosity. Thermomechanical failure manifests itself in undrained conditions as a development of advanced irreversible strains due to heating u ... Full text Cite

Uniqueness and localization-II. Coupled elastoplasticity

Journal article International Journal of Solids and Structures · January 1, 1991 Uniqueness of the incremental response is investigated for an elastoplastic coupling model with elastic stiffness degradation. The criteria of second order work positiveness and strain localization are used in the form derived by Bigoni and Hueckel (1991. ... Full text Cite

Uniqueness and localization-I. Associative and non-associative elastoplasticity

Journal article International Journal of Solids and Structures · January 1, 1991 Localization of deformation into a planar band in the incremental response of elasto-plastic material is studied in the case of small strains and rotations. The critical hardening modulus for localization is given in an explicit form (uncoupled from the ba ... Full text Cite

Dilatancy hysteresis in rocks: a generalized ramberg-osgood approach

Journal article Computers and Geotechnics · January 1, 1991 A review and interpretation of representative experimental data is given on the cyclic properties of rocks. Emphasis is placed on data concerning the development of hysteresis of volumetric strain. Volumetric strain occuring during stress cycles well below ... Full text Cite

Coupled thermal-mechanical-hydraulic model of saturated clays subjected to heating

Journal article American Society of Mechanical Engineers Heat Transfer Division Publication HTD · January 1, 1991 Due to the strong electro-chemical forces generated in clay mineral system, there exist three constituents with different physical and mechanical properties in saturated clay soils. They are solid mineral, bulk (mobile) water, and adsorbed (immobile) water ... Cite

On uniqueness and strain localization in plane strain and plane stress elastoplasticity

Journal article Mechanics Research Communications · January 1, 1990 Full text Cite

A note on strain localization for a class of non-associative plasticity rules

Journal article Ingenieur Archiv · January 1, 1990 Explicit solutions for the formation of discontinuity bands are obtained, for a class of non-associative flow rules. Specialization to particular yield functions for pressure sensitive, dilatant or compactive materials is given. © 1990 Springer-Verlag. ... Full text Cite

Thermoplasticity of saturated soils and shales: Constitutive equations

Journal article Journal of Geotechnical Engineering · January 1, 1990 Plastic behavior of soils and shales due to heating and loading under constant elevated temperature is discussed in terms of a thermoplastic version of the critical state model. Rules for dependence of the yield surface on temperature in the elastic states ... Full text Cite

Addendum to "on uniqueness and strain localization in plane strain and plane stress elastoplasticity"

Journal article Mechanics Research Communications · January 1, 1990 Full text Cite

Thermoplasticity of saturated clays: Experimental constitutive study

Journal article Journal of Geotechnical Engineering · January 1, 1990 Experimental results obtained from thermomechanical tests on three clays are analyzed in light of the constitutive equations of soil thermoplasticity presented in a companion paper. Heating and cooling drained tests at constant isotropic stress show a stro ... Full text Cite

Thermoplasticity of saturated clays: Experimental constitutive study

Journal article ASCE J. of Geotech. Engrg. · 1990 Cite

Modeling of thermal failure of saturated clays

Journal article Numerical Models in Geomechanics NUMOG III · January 1, 1989 Thermal failure develops in saturated clays of low porosity, when, relatively large deviatoric strain occurs due to heating at constant total stress. Experiments in undrained conditions show a water pressure buildup resulting in the plastic flow at tempera ... Cite

Thermal volume changes of the mineral-water system in low-porosity clay soils

Journal article Canadian Geotechnical Journal · January 1, 1988 Heating tests at (various) constant effective stress and isotropic loading tests at (various) constant temperatures were performed on low-porosity clays under drained conditions. The results indicate that the thermal expansion of adsorbed water in these cl ... Full text Cite

Some geotechnical aspects of radioactive waste isolation in continental clays

Journal article Computers and Geotechnics · January 1, 1987 Clays are chosen in Italy and Belgium and considered in the USA and UK as a medium for the isolation of high-level radioactive waste. Very low permeability and high ductility make clay an attractive candidate rock insuring both negligible migration of natu ... Full text Cite

HARD CLAY AS HOST MEDIUM: THERMO-MECHANICAL EXPERIMENTS AND MODEL.

Journal article Materials Research Society Symposia Proceedings · December 1, 1986 Clay's impermeability is an essential feature for the quality of a possible repository. However, it results in a substantial pore water pressure rise induced by heating whose magnitude and dissipation rate depend on the clay's deformational response to hea ... Cite

Discretized kinematic hardening in cyclic degradation of rocks and soils

Journal article Engineering Fracture Mechanics · January 1, 1985 A discretized description is made of the process of kinematic hardening in elasto-plastic solids in the range of infinitesimal strains. Applications of this description to the modelling of response to cyclic loading of rocks and soils are presented. © 1985 ... Full text Cite

Experimental constitutive study of cyclic response of sand.

Journal article Proc 11th International Conference on Soil Mechanics and Foundation Engineering San Francisco August 1985 Vol 2 Balkema · January 1, 1985 Experiments on drained fully saturated sand are reported on cyclic shear under constant pressure and on cyclic compaction under constant stress deviator. Strong dependence of hysteresis on irreversible prestrain is observed. -from Authors ... Cite

A model of soil behaviour in plastic and hysteretic ranges. Part II: cyclic loading.

Journal article Constitutive Relations for Soils Workshop Results Grenoble 1982 · January 1, 1984 Soil response to cyclic loading within the yield surface is approached by assuming a piece-wise path independent constitutive law. The model may be seen as a discretized kinematic hardening plasticity with a separate description of path dependent and path ... Cite

MODEL FOR DILATANT ROCK BEHAVIOUR UNDER VARIABLE LOADING.

Journal article undefined · December 1, 1982 Cite

An engineering theory of soil behaviour in unloading and reloading

Journal article Meccanica · September 1, 1981 A constitutive law is proposed for describing the stress-strain characteristic of soils in unloading-reloading. The constitutive equations are valid piecewisely between subsequent, appropriately formulated, stress reversal loci. The stress-strain relations ... Full text Cite

PRZYBLIZONA ANALIZA SCISKANIA FILAROW SKALNYCH W STANIE POKRYTYCZNYM. left bracket Approximate Analysis of the Compression of Rock Pillars in Post-critical Range right bracket .

Journal article Archiwum Gornictwa/Archives of Mining Sciences · 1981 An approximate method is presented for analyzing the behavior of rock pillars interacting with surrounding deformable layers under the action of a convergence of external layers treated as rigid. For this purpose a linearized model of the behavior of the r ... Cite

UNIFIED APPROACH TO THE MODELLING OF LIQUEFACTION AND CYCLIC MOBILITY OF SANDS.

Journal article Soils and Foundations · January 1, 1981 The problem of liquefaction of sand under either monotonic or cyclic loading is tackled from the point of view of Continuum Mechanics. It is shown that a suitable constitutive model may explain, in a phenomenological sense, the generation of pore pressure ... Cite

SULLA DEGRADAZIONE CICLICA DELLE ARGILLE. left bracket On Cyclic Degradation of Clay right bracket .

Journal article Rivista Italiana di Geotecnica · 1981 The paper shows that a suitable constitutive model of soil behavior gives useful information on the variation of strength and deformability of a clay due to cyclic loading. This allows a comprehensive understanding of the cyclic degradation and a substanti ... Cite

ON DISCRETE STRESS RATE SENSITIVITY IN PIECEWISE MODELLING OF CYCLIC LOADING OF SOLIDS.

Journal article Journal De Mecanique · January 1, 1981 The constitutive rule is considered for the constitutive matrix change at stress reversals. This additional rule should complement usual, piecewise, path independent or hypoelastic descriptions of solid behavior when applied to cyclic loading. The rule com ... Cite

On Cyclic Degradation of Clay.

Journal article Rivista Italiana Di Geotecnica · January 1, 1981 The paper shows that a suitable constitutive model of soil behavior gives useful information on the variation of strength and deformability of a clay due to cyclic loading. This allows a comprehensive understanding of the cyclic degradation and a substanti ... Cite

Approximate Analysis of the Compression of Rock Pillars in Post-critical Range.

Journal article Archiwum Gornictwa · January 1, 1981 An approximate method is presented for analyzing the behavior of rock pillars interacting with surrounding deformable layers under the action of a convergence of external layers treated as rigid. For this purpose a linearized model of the behavior of the r ... Cite

left double quote GEOTECHNICAL right double quote STRESS VARIABLES APPROACH TO CYCLIC BEHAVIOUR OF SOILS.

Journal article Microstructural Science · 1980 The paper presents a mathematical description of the memory of a material. In this framework the stress-strain constitutive law is written in terms of left double quote geotechnical right double quote stress variables, with which it is possible to take acc ... Cite

″GEOTECHNICAL″ STRESS VARIABLES APPROACH TO CYCLIC BEHAVIOUR OF SOILS.

Journal article Microstructural Science · January 1, 1980 The paper presents a mathematical description of the memory of a material. In this framework the stress-strain constitutive law is written in terms of ″geotechnical″ stress variables, with which it is possible to take account of the logarithmic dependence ... Cite

A ' geotechnical' stress variables approach to cyclic behaviour of soils.

Journal article Soils Under Cyclic and Transient Loading Volume 1 Proc International Symposium Swansea 7 11 January 1980 · January 1, 1980 The presented mathematical model of soil behaviour under cyclic loading combines theories pertinent to the elastoplastic and paraelastic range. -Keith Clayton ... Cite

HYSTERESIS BEHAVIOUR OF SOILS AND ROCKS.

Journal article Transactions of the International Conference on Structural Mechanics in Reactor Technology · January 1, 1979 A theory of mechanical hysteresis of geological materials under alternating loading within the yield locus is studied, with emphasis on isotropic pressure sensitivity effects. Specialization to conventional triaxial tests is considered. The feasibility of ... Cite

Some hysteresis effects of the behaviour of geologic media

Journal article International Journal of Solids and Structures · January 1, 1979 A soil mechanics oriented theory of the hysteretic behaviour of materials under alternating loading is presented. Special attention is focused on the behaviour within the yield locus. The single hysteresis branches are described by piecewisely path indepen ... Full text Cite

Nonassociated and coupled flow rules of elastoplasticity for rock-like materials

Journal article International Journal of Rock Mechanics and Mining Sciences and · January 1, 1979 Incremental elastoplastic stress-strain relations are studied which allow for non association of plastic strain rates with the (smooth) current yield surface (non-normality), and/or changing elastic moduli because of plastic deformations (elastoplastic cou ... Full text Cite

PARAELASTIC HYSTERESIS OF SOILS AND ROCKS

Journal article BULLETIN DE L ACADEMIE POLONAISE DES SCIENCES-SERIE DES SCIENCES TECHNIQUES · 1979 Link to item Cite

Incremental boundary value problems in the presence of coupling of elastic and plastic deformations: A rock mechanics oriented theory

Journal article International Journal of Solids and Structures · January 1, 1977 In some elastoplastic systems (typically rocklike media) the elastic properties are affected by plastic yielding. This "coupling" phenomenon is dealt with in this paper in the context of the incremental theory of plasticity with nonassociated (lacking norm ... Full text Cite

Coupling of elastic and plastic deformations of bulk solids

Journal article Meccanica · December 1, 1976 In such solids like rocks, soils, ceramics, grain en masse the plastic deformation strongly aects the current unloading modulus. The consequences of this effect referred to as the elastoplastic coupling both to the elastic and the plastic part of the const ... Full text Cite

On the description of non-linear elasticity of granular media

Journal article Mech. Teor. Stosow. (Poland) · 1976 Various physical laws are proposed in the paper aimed at the application to the description of granular materials ... Cite

O OPISIE FIZYCZNIE NIELINIOWEJ SPREZYSTOSCI MATERIALOW SYPKICH (Description of Physically Nonlinear Elasticity of Granular Materials)

Journal article Mechanika Teoretyczna i Stosowana · 1976 The properties of simple (i. e. , tensorially linear) physically nonlinear relations describing the elastic properties of granular materials are illustrated. On the basis of the conditions of integrability and potentiality of these relations, a study is ma ... Cite

Description of Physically Nonlinear Elasticity of Granular Materials.

Journal article Mech Teor I Stosow · January 1, 1976 The properties of simple (i. e. , tensorially linear) physically nonlinear relations describing the elastic properties of granular materials are illustrated. On the basis of the conditions of integrability and potentiality of these relations, a study is ma ... Cite

ON DILATATIONAL EFFECTS OF INELASTIC GRANULAR MEDIA.

Journal article Arch Mech Arch Mech Stosow · January 1, 1975 An incremental elastic-plastic model of granular material is proposed. The theory is based on dilatational plasticity for the irreversible part of deformation and hypoelasticity for the reversible part. The hardening and hypoelastic moduli are postulated t ... Cite

ON PLASTIC FLOW OF GRANULAR AND ROCKLIKE MATERIALS WITH VARIABLE ELASTICITY MODULI.

Journal article Bull Acad Pol Sci Ser Sci Tech · January 1, 1975 Elastic-plastic coupled deformation theory for granular and geological materials is discussed. The derived flow law appears to be a kind of nonassociated one due to an additional term which follows from the variation of elasticity moduli. The dilatation fu ... Cite

PLASTIC-FLOW OF GRANULAR AND ROCKLIKE MATERIALS WITH VARIABLE ELASTICITY MODULI

Journal article BULLETIN DE L ACADEMIE POLONAISE DES SCIENCES-SERIE DES SCIENCES TECHNIQUES · 1975 Link to item Cite

DILATATIONAL EFFECTS OF INELASTIC GRANULAR MEDIA

Journal article ARCHIVES OF MECHANICS · 1975 Link to item Cite

HYSTERESIS BEHAVIOUR OF SOILS AND ROCKS.

Journal article Transactions of the International Conference on Structural Mechanics in Reactor Technology A theory of mechanical hysteresis of geological materials under alternating loading within the yield locus is studied, with emphasis on isotropic pressure sensitivity effects. Specialization to conventional triaxial tests is considered. The feasibility of ... Cite