A novel stabilized NS-FEM formulation for anisotropic double porosity media

Computer Methods in Applied Mechanics and Engineering, Год журнала: 2022, Номер 401, С. 115666 - 115666

Опубликована: Окт. 12, 2022

Язык: Английский

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Modeling heterogeneity and permeability evolution in a compaction band using a phase-field approach

Journal of the Mechanics and Physics of Solids, Год журнала: 2023, Номер 181, С. 105441 - 105441

Опубликована: Сен. 22, 2023

Язык: Английский

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Time scales in the primary and secondary compression of soils

International Journal for Numerical and Analytical Methods in Geomechanics, Год журнала: 2022, Номер 46(8), С. 1383 - 1408

Опубликована: Фев. 27, 2022

Abstract The last several decades have seen a surge of papers dealing with analytical and semi‐analytical solutions to the problem one‐dimensional consolidation soils. But rarely has any these contributions focused on time scales arising from combined primary secondary compression. Primary compression always been attributed dissipation excess pore pressure as fluid is expelled soil skeleton drainage boundaries. However, there schools thought when it comes process governing In this paper, we attribute following processes occurring either individually or in combination: (a) rate‐dependent (viscoplastic) constitutive response skeleton; (b) existence scale system that expels smaller‐scale pores larger‐scale pores; (c) delayed due creep Bjerrum's concept consolidation. Contributions present work include closed‐form soils one dimension, well quantitative analysis involved such coupled hydromechanical processes.

Язык: Английский

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Elastic shear stiffness anisotropy and fabric anisotropy of natural clays

Acta Geotechnica, Год журнала: 2022, Номер 17(8), С. 3229 - 3243

Опубликована: Фев. 8, 2022

Язык: Английский

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Insights into anisotropic swelling pressure of compacted GMZ bentonite

Acta Geotechnica, Год журнала: 2023, Номер 18(11), С. 5721 - 5734

Опубликована: Июль 24, 2023

Язык: Английский

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Bridging nanoindentation and triaxial creep tests on a shale

Acta Geotechnica, Год журнала: 2023, Номер 18(12), С. 6475 - 6487

Опубликована: Дек. 1, 2023

Язык: Английский

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Study on failure characteristics and evaluation index of aquifer shale based on energy evolution

Acta Geotechnica, Год журнала: 2024, Номер 19(10), С. 6691 - 6710

Опубликована: Апрель 25, 2024

Abstract The presence of abundant clay components and microporous structure in shale results its high hydrophilicity, making a water-rich environment inevitable petroleum exploration projects. Therefore, it is crucial to consider the influence bedding structure, moisture content, confining pressure, their combined effects on geomechanical properties shale. This article aims investigate mechanical deep under varying water content conditions, elucidate failure mode mechanism actual engineering scenarios, explores interplay between stress, other factors properties. evaluation wellbore stability fracture propagation proposed based laboratory experiments using triaxial stress strain data, along with application energy evolution theory. experimental procedures encompass an analysis shale's microscopic as well anisotropic compression tests conducted different contents pressures. demonstrate that exhibits dense pores microstructure displays pronounced characteristics macrostructure. within these pores, situ formation, significantly influences anisotropy decreases increasing but performance still decreases. Under increase pressure some extent enhances deformation characteristics, which related modes However, detrimental effect persists. In order quantify impact factors, this study utilizes elastic modulus indicator coupling effect. It combines curve obtained from proposes index for suitable assessing (the called SI r ) crack expansion brittleness BI ). calculation reveal that, during drilling process, excavating parallel direction while maintaining low yields higher value, indicating better stability. On hand, reservoir fracturing, fracturing perpendicular result smaller value. approach more beneficial network engineering.

Язык: Английский

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Hydromechanical coupling in unsaturated clayey rocks with double porosity based on a multiscale homogenization procedure

Computers and Geotechnics, Год журнала: 2024, Номер 171, С. 106380 - 106380

Опубликована: Апрель 29, 2024

Язык: Английский

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A poromechanical framework for hydraulic fracturing processes in transversely isotropic rocks

Acta Geotechnica, Год журнала: 2025, Номер unknown

Опубликована: Янв. 27, 2025

Язык: Английский

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Freezing‐induced stiffness and strength anisotropy in freezing clayey soil: Theory, numerical modeling, and experimental validation

International Journal for Numerical and Analytical Methods in Geomechanics, Год журнала: 2022, Номер 46(11), С. 2087 - 2114

Опубликована: Июнь 16, 2022

Abstract This paper presents a combined experimental‐modeling effort to interpret the coupled thermo‐hydro‐mechanical behaviors of freezing soil, where an unconfined, fully saturated clay is frozen due temperature gradient. By leveraging rich experimental data from microCT images and measurements taken during process, we examine not only how growth ice induces volumetric changes soil in specimen but also presence propagation fringe front may evolve anisotropy effective media soil–ice mixture that cannot be otherwise captured phenomenologically isotropic saturation‐dependent critical state models for plasticity. The resultant model helpful providing qualitative description affects responses clayey material, provide mean generate more precise predictions heaving ground.

Язык: Английский

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