A multi-horizon fully coupled thermo-mechanical peridynamics

Journal of the Mechanics and Physics of Solids, Год журнала: 2024, Номер 191, С. 105758 - 105758

Опубликована: Июнь 28, 2024

Язык: Английский

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Computational multiphase micro‐periporomechanics for dynamic shear banding and fracturing of unsaturated porous media

International Journal for Numerical Methods in Engineering, Год журнала: 2024, Номер 125(9)

Опубликована: Фев. 5, 2024

Abstract Dynamic shearing banding and fracturing in unsaturated porous media are significant problems engineering science. This article proposes a multiphase micro‐periporomechanics (PPM) paradigm for modeling dynamic shear media. Periporomechanics is nonlocal reformulation of classical poromechanics to model continuous discontinuous deformation/fracture fluid flow through single framework. In PPM, material postulated as collection finite number mixed points. The length scale PPM that dictates the interaction between points mathematical object lacks direct physical meaning. As novelty, coupled microstructure‐based incorporated by considering micro‐rotations solid skeleton following Cosserat continuum theory solids. new contribution, we reformulate second‐order work detecting instability energy‐based crack criterion J‐integral paradigm. stabilized correspondence principle mitigates zero‐energy mode augmented include flow. We have numerically implemented novel dual‐way fractional‐step algorithm time hybrid Lagrangian–Eulerian meshfree method space. Numerical examples presented demonstrate robustness efficacy proposed

Язык: Английский

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Modelling rapid non-destructive test using light weight deflectometer on granular soils across different degrees of saturation

Journal of Rock Mechanics and Geotechnical Engineering, Год журнала: 2024, Номер 16(7), С. 2732 - 2748

Опубликована: Фев. 7, 2024

This study introduces an advanced finite element model for the light weight deflectometer (LWD), which integrates contact mechanics with fully coupled models. By simulating LWD tests on granular soils at various saturation levels, accurately reflects dependence of modulus dry density, water content, and effective stress. addresses overcomes limitations previous models this specific problem. Simultaneously, research presents first experimentally validated impact model. Furthermore, provides a comparative assessment elastoplastic nonlinear elastic contrasts enriched node-to-segment method (developed in study) more precise mortar technique mechanics. These comparisons reveal unique advantages challenges each method. Moreover, underscores importance careful application modulus, emphasising need sophisticated tools to interpret soil behaviour accurately.

Язык: Английский

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Computational Cosserat periporomechanics for strain localization and cracking in deformable porous media

International Journal of Solids and Structures, Год журнала: 2023, Номер 288, С. 112593 - 112593

Опубликована: Ноя. 23, 2023

Язык: Английский

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Modeling dynamic crack branching in unsaturated porous media through multi‐phase micro‐periporomechanics

International Journal for Numerical and Analytical Methods in Geomechanics, Год журнала: 2024, Номер 48(11), С. 2822 - 2853

Опубликована: Май 3, 2024

Abstract Dynamic crack branching in unsaturated porous media holds significant relevance various fields, including geotechnical engineering, geosciences, and petroleum engineering. This article presents a numerical investigation into dynamic using recently developed coupled micro‐periporomechanics (PPM) paradigm. paradigm extends the PPM model by incorporating micro‐rotation of solid skeleton. Within this framework, each material point is equipped with three degrees freedom: displacement, micro‐rotation, fluid pressure. Consistent Cosserat continuum theory, length scale associated points inherently integrated model. study encompasses several key aspects: (1) Validation micro‐PPM for effectively modeling deformable media, (2) Examination transition from single branch to multiple branches under drained conditions, (3) Simulation loading (4) Investigation conditions. The results obtained are systematically analyzed elucidate factors that influence subjected loading. Furthermore, comprehensive findings underscore efficacy robustness accurately variably saturated media.

Язык: Английский

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Nanoscale soil-water retention mechanism of unsaturated clay via MD and machine learning

Computers and Geotechnics, Год журнала: 2023, Номер 163, С. 105678 - 105678

Опубликована: Авг. 8, 2023

Язык: Английский

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Mode I sub- and super-shear rupture and forerunning in porous media

Computers and Geotechnics, Год журнала: 2024, Номер 171, С. 106372 - 106372

Опубликована: Май 4, 2024

Numerical simulations demonstrate the occurrence of both sub- and supershear ruptures in dry saturated porous media during mode I fracture. Initially, Finite Element Method is applied to investigate a case sub-shear velocity beam on an elastic foundation subjected sinusoidal loading. Subsequently, Extended employed for fluid injection infinite medium plate. The results reveal transition from smooth behavior stepwise pattern eventually forerunning as rate increases. Notably, this progression has been observed first time. Finally, hybrid Element/Peridynamic model utilized explore fully under mechanical In media, also considered. Both methods document velocities surpassing shear wave. noteworthy aspect that these results, obtained through entirely different numerical constitutive relations, justify confidence assertion that, fracture, speeds exceeding wave even dilatation can be achieved forerunning. loading condition investigated may relevant geophysics.

Язык: Английский

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A coupled hydro-mechanical peridynamic model for unsaturated seepage and crack propagation in unsaturated expansive soils due to moisture change

Acta Geotechnica, Год журнала: 2023, Номер 18(12), С. 6297 - 6313

Опубликована: Окт. 5, 2023

Язык: Английский

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Liquefaction-induced large deformation method with automatic time-step mapping and interfacial interpolation improvement: Case study of the San Fernando dam

Computers and Geotechnics, Год журнала: 2024, Номер 171, С. 106351 - 106351

Опубликована: Апрель 26, 2024

Язык: Английский

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Modeling the large deformation failure behavior of unsaturated porous media with a two-phase fully-coupled smoothed particle finite element method

Computer Methods in Applied Mechanics and Engineering, Год журнала: 2024, Номер 427, С. 117013 - 117013

Опубликована: Апрель 29, 2024

Язык: Английский

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