Dynamic strain localization into a compaction band via a phase-field approach

Journal of the Mechanics and Physics of Solids, Journal Year: 2023, Volume and Issue: 173, P. 105228 - 105228

Published: Feb. 2, 2023

We present a new phase-field formulation for the formation and propagation of compaction band in high-porosity rocks. Novel features proposed include (a) effects inertia on rate development bands, (b) degradation mechanisms tension, compression, shear appropriate dynamic strain localization problems where disturbances propagate time wave-like fashion to induce micro-cracking, grain crushing, frictional rearrangement rock. also robust numerical technique handle spatiotemporal evolution band. validate model by simulating benchmark problem involving V-shape notched cylindrical specimen Bentheim sandstone tested conventional triaxial compression. The is shown reproduce different geometric styles deformation that pure compaction, shear-enhanced combination mechanism consists straight primary surrounded secondary chevron bands.

Language: Английский

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A double-yield-surface plasticity theory for transversely isotropic rocks

Acta Geotechnica, Journal Year: 2022, Volume and Issue: 17(11), P. 5201 - 5221

Published: June 24, 2022

Language: Английский

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Multiscale interactions of elastic anisotropy in unsaturated clayey rocks using a homogenization model

Acta Geotechnica, Journal Year: 2023, Volume and Issue: 18(5), P. 2289 - 2307

Published: Jan. 15, 2023

Language: Английский

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Solid–fluid interaction in porous materials with internal erosion

Acta Geotechnica, Journal Year: 2023, Volume and Issue: 18(10), P. 5147 - 5164

Published: June 1, 2023

Language: Английский

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A phase‐field approach for compaction band formation due to grain crushing

International Journal for Numerical and Analytical Methods in Geomechanics, Journal Year: 2022, Volume and Issue: 46(16), P. 2965 - 2987

Published: Aug. 11, 2022

Abstract Compaction bands are tabular regions of localized compressive deformation with little or no shear offset. Often observed in high‐porosity rocks, they can be classified into several subtypes based on their pattern and orientation respect to the maximum principal stress. The combined effects material properties loading conditions type compaction that develop not fully understood, realistic simulations formation always successful. In this study, a phase‐field approach for capturing propagation is proposed. fracture energy utilized classic formulations interpreted driven by grain crushing herein characterized breakage mechanics theory. A new decomposition free function introduced which stored plastic compactive flow drives crushing. Depending value release rate, model predicts different styles remarkably consistent those field. Numerical demonstrate role confining pressure, plasticity, critical predicted bands.

Language: Английский

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

Computer Methods in Applied Mechanics and Engineering, Journal Year: 2022, Volume and Issue: 401, P. 115666 - 115666

Published: Oct. 12, 2022

Language: 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, Journal Year: 2023, Volume and Issue: 181, P. 105441 - 105441

Published: Sept. 22, 2023

Language: Английский

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Deformation and Stability in Coal Seam Mining Under Fluid–Solid Coupling

Geotechnical and Geological Engineering, Journal Year: 2024, Volume and Issue: 42(6), P. 4333 - 4348

Published: April 24, 2024

Language: Английский

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A poromechanical framework for hydraulic fracturing processes in transversely isotropic rocks

Acta Geotechnica, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 27, 2025

Language: Английский

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Time scales in the primary and secondary compression of soils

International Journal for Numerical and Analytical Methods in Geomechanics, Journal Year: 2022, Volume and Issue: 46(8), P. 1383 - 1408

Published: Feb. 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.

Language: Английский

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