Back-calculation of soil parameters from displacement-controlled cavity expansion under geostatic stress by FEM and machine learning DOI Creative Commons
Fernando Patino-Ramirez,

Zijie Jay Wang,

Duen Horng Chau

et al.

Acta Geotechnica, Journal Year: 2022, Volume and Issue: 18(4), P. 1755 - 1768

Published: Sept. 23, 2022

Abstract Estimating soil properties from the mechanical reaction to a displacement is common strategy, used not only in situ characterization (e.g., pressuremeter and dilatometer tests) but also by biological organisms roots, earthworms, razor clams), which sense stresses explore subsurface. Still, absence of analytical solutions predict stress deformation fields around cavities subject geostatic stress, has prevented development methods that resemble strategies adopted nature. We use finite element method (FEM) model displacement-controlled expansion under wide range conditions properties. The radial distribution at cavity wall during extracted. Then, are proposed prepare, transform such distributions back-calculate far field parameters material (Mohr-Coulomb friction angle $$\phi $$ ϕ , Young’s modulus E ). Results show that: (i) initial can be fitted sum cosines estimate stresses; (ii) By encoding as intensity images, addition certain scalar parameters, convolutional neural networks consistently accurately soil.

Language: Английский

Dynamic strain localization into a compaction band via a phase-field approach DOI Creative Commons
Yunteng Wang,

Ronaldo I. Borja,

Wei Wu

et al.

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

Citations

39
A bond-level energy-based peridynamics for mixed-mode fracture in rocks DOI Creative Commons
Yunteng Wang, Wei Wu

Computer Methods in Applied Mechanics and Engineering, Journal Year: 2023, Volume and Issue: 414, P. 116169 - 116169

Published: June 26, 2023

This paper deals with the numerical simulation of initiation and propagation mixed mode fracture in rocks. A bond-level energy-based peridynamic model is developed by introducing a dilatation function to capture both volumetric deviatoric deformations. We proceed define nonlocal stresses obtain isotropic forces commensurate then come up new failure link computational peridynamics some phenomenological criteria, which highly relevant for brittle quasi-brittle Finally, several examples mixed-mode fractures are presented show performance our model.

Language: Английский

Citations

33
Multiscale interactions of elastic anisotropy in unsaturated clayey rocks using a homogenization model DOI
Sabrina C.Y. Ip,

Ronaldo I. Borja

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

Published: Jan. 15, 2023

Language: Английский

Citations

17
Solid–fluid interaction in porous materials with internal erosion DOI
Wei Chen, Yang Zhao,

Ronaldo I. Borja

et al.

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

Published: June 1, 2023

Language: Английский

Citations

17
Grey relation analysis and multiple criteria decision analysis method model for suitability evaluation of underground space development DOI

Xin Ni,

Li Jiang,

Jiangyan Xu

et al.

Engineering Geology, Journal Year: 2024, Volume and Issue: 338, P. 107608 - 107608

Published: June 25, 2024

Language: Английский

Citations

8
A phase‐field approach for compaction band formation due to grain crushing DOI
Sabrina C.Y. Ip,

Ronaldo I. Borja

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

Citations

24
A novel stabilized NS-FEM formulation for anisotropic double porosity media DOI
Qi Zhang,

Ze‐Yu Wang,

Zhen‐Yu Yin

et al.

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

Published: Oct. 12, 2022

Language: Английский

Citations

23
A constitutive framework for rocks undergoing solid dissolution DOI Creative Commons

Ronaldo I. Borja,

Wei Chen, Alesanmi R. Odufisan

et al.

Journal of the Mechanics and Physics of Solids, Journal Year: 2023, Volume and Issue: 173, P. 105198 - 105198

Published: Jan. 7, 2023

Language: Английский

Citations

16
Modeling heterogeneity and permeability evolution in a compaction band using a phase-field approach DOI
Sabrina C.Y. Ip,

Ronaldo I. Borja

Journal of the Mechanics and Physics of Solids, Journal Year: 2023, Volume and Issue: 181, P. 105441 - 105441

Published: Sept. 22, 2023

Language: Английский

Citations

13
Mechanics of thermal spallation and fracturing of dry rocks produced by surface heating DOI
Yide Guo, Arcady Dyskin, Elena Pasternak

et al.

Acta Geotechnica, Journal Year: 2024, Volume and Issue: 19(8), P. 5517 - 5543

Published: Feb. 22, 2024

Language: Английский

Citations

5