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Growth of slip surfaces in 3D conical slopes Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210510
Boaz Klein, Alexander M. PuzrinOut‐of‐plane curvature of real submarine slopes imposes limitations on applicability of existing planar criteria for catastrophic growth of slip surfaces. In this paper, the growth of an initially weakened zone in three‐dimensional (3D) convex and concave slopes is investigated using the process zone approach. The geometry of the problem is presented in a curvilinear coordinate system for which the

The deformation and failure of strip footings on anisotropic cohesionless sloping grounds Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210503
Zhiwei Gao, Jidong Zhao, Xin LiFooting foundations are sometimes built on sloping grounds of natural sand which is highly anisotropic. The anisotropic mechanical behaviour of sand can significantly influence the bearing capacity of a foundation and the failure mechanism of its supporting slope. Neglecting sand anisotropy may lead to overestimated bearing capacity and under‐design of foundations. A numerical investigation on the

Solutions for one‐dimensional consolidation of unsaturated soil with general boundary conditions subjected to time‐dependent load Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210430
Jiajun Niu, Daosheng Ling, Song Zhu, Shilin Gong, Zhendong ShanBased on the governing equations proposed by Fredlund and Hasan, this paper firstly establishes a mathematical model for one‐dimensional consolidation of single‐layer unsaturated soil with general boundary conditions, arbitrary initial conditions and time‐dependent external load. Then the eigenfunction expansion method is used to derive series solutions for excess pore water pressure and excess pore

Bayesian inference of spatially varying parameters in soil constitutive models by using deformation observation data Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210429
Yuan‐qin Tao, Hong‐lei Sun, Yuan‐qiang CaiParameters of soil constitutive models are usually identified through laboratory tests. The spatial variability of these parameters is generally not considered due to the limitation of the test scale. This study proposes a data‐driven approach to infer the spatially varying parameter of the modified Cam‐clay model from limited field observations and subsequently improves soil settlement predictions

Upscaling critical state considering the distribution of meso‐structures in granular materials Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210429
Xiaoxiao Wang, Yang Liu, Pengqiang YuThe evolutions of meso structures of granular materials play important roles during shearing toward the critical state. This study aims to establish an extended analytical model based on a specific upscaling procedure considering the distributions of meso structures in granular materials. A general Gaussian distribution is applied when determining the relationship between meso critical state parameters

Machine learning–based uncertainty modelling of mechanical properties of soft clays relating to time‐dependent behavior and its application Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210427
Pin Zhang, Yin‐Fu Jin, Zhen‐Yu YinUncertainty is a commonplace and significant issue in geotechnical engineering. Unlike conventional statistical and machine learning methods, this study presents a novel approach to correlating soil properties that takes uncertainty into account using an artificial neural network with Monte Carlo dropout (ANN_MCD). An uncertainty model for two important soil properties, creep index Cα, and hydraulic

Soil‐structure interface modeling with the nonlinear incremental approach Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210422
Jie Yang, Zhen‐Yu YinThis paper aims to develop the nonlinear incremental modeling approach for describing both monotonic and cyclic behaviors of the soil‐structure interface. An exponential function is adopted as an example to reproduce the asymptotic relationship between the interface shear stress ratio and the shear displacement. A stress‐dilatancy relation is developed for the shear‐induced change of interface thickness

An extended numerical manifold method for unsaturated soil‐water interaction analysis at micro‐scale Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210417
Hao Sun, Zhijun Wu, Liange Zheng, Yongtao Yang, Da HuangTo investigate unsaturated soil‐water interaction at micro‐scale, this study extends the numerical manifold method (NMM) by incorporating a soil‐water coupling model considering specific capillary water distribution and capillary force calculation. The soil skeleton is constructed by a soil skeleton generation algorithm with random polygons. To more realistically capture the interaction between soil

Radial consolidation analysis of unsaturated soil with vertical drains under various cyclic loadings Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210415
Pyol Kim, Myong‐Chol Ri, Kil‐Sang Ri, Myong‐Chol Rim, Song‐Guk JongThe pivotal aim of this research is to investigate the radial consolidation behavior of unsaturated soil by vertical drains under various cyclic loadings. Based on Fredlund and Hasan's consolidation theory for unsaturated soil, the governing equations for radial consolidation of unsaturated soil are converted into a set of conventional diffusion equations by introducing two new variables. Then, the

Numerical simulation of unstable suction transients in unsaturated soils: the role of wetting collapse Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210415
Yanni Chen, Giuseppe BuscarneraFluid injection is one of the major triggering factors of instability in unsaturated soils. Robust simulation tools are therefore required to examine hydrologic transients in such a class of inelastic materials. In this paper, the governing equations imposing the balance of mass and momentum in deformable unsaturated porous media are inspected from an analytical perspective. Our main goal is to examine

A plane‐strain hydraulic fracture driven by a shear‐thinning Carreau fluid Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210415
Lucas Pereira, Brice LecampionWe study the propagation of a plane‐strain hydraulic fracture driven by a shear thinning fluid following a Carreau rheology. We restrict to the impermeable medium case and quantify in details the impact on fracture growth of the shear‐thinning properties of the fluid between the low and high shear‐rates Newtonian limits. We derive several dimensionless numbers governing the evolution of the solution

A constitutive model for the accumulated strain of unsaturated soil under high‐cycle traffic loading Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210202
Zhigang Cao, Jingyu Chen, Eduardo E. Alonso, Anna Ramon Tarragona, Yuanqiang Cai, Chuan Gu, Qi ZhangThe road base is normally situated above the water table and thus in unsaturated state. Experimental results show that the accumulated strains of the unsaturated road base aggregate under high‐cycle traffic loads are significantly influenced by the matric suction. To predict the accumulated strain of unsaturated road base aggregate under high‐cycle traffic loads, a constitutive model was developed

Stress evolution in elastically heterogeneous and non‐linear fluid‐saturated media with a Green's function approach Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210408
Matheus L. Peres, Leonardo C. Mesquita, Yves M. Leroy, Elisa D. SotelinoClassical analytical solutions of linear elasticity are used as auxiliary solutions to solve non‐linear, and elastically heterogeneous problems on fluid‐saturated media. The 2D Kelvin's solution for a homogeneous space is considered here for simplicity sake. The material non‐linearity could be due to irreversible deformations or non‐linear elasticity response typical of 4D analysis as it is done here

Symmetric high order microplane model for damage localization and size effect in quasi‐brittle materials Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210326
Erol Lale, Gianluca CusatisThis paper presents the so‐called symmetric high‐order microplane (SYHOM) model for the simulation of damage localization and size effect in quasi‐brittle materials. Contrarily to its predecessor, the high order microplane (HOM) model, SYHOM is formulated without rotational degrees of freedom, does not require couple stresses, and solves stability issues created by the antisymmetric components of stress

Extensions of the dynamic Newmark method for seismic stability analysis of a rock block Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210325
Xiaodong Fu, Wenjie Du, Qian Sheng, Jian Chen, Qiang Fang, Yongqiang ZhouThe Newmark sliding block method combined with block theory (referred to as the dynamic Newmark method) can be used to calculate the dynamic safety factor and the permanent displacement, which provides a quantitative tool to evaluate the dynamic stability of a rock block under seismic action. Frequent changes in the position of a rock block under seismic action may lead to the changes in contact areas

A semi‐implicit material point method based on fractional‐step method for saturated soil Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210323
Shyamini Kularathna, Weijian Liang, Tianchi Zhao, Bodhinanda Chandra, Jidong Zhao, Kenichi SogaIn this paper, a new formulation of material point method (MPM) to model coupled soil deformation and pore fluid flow problems is presented within the framework of the theory of porous media. The saturated porous medium is assumed to be consisting of incompressible pore fluid and deformable soil skeleton made up of incompressible solid grains. The main difference of the proposed MPM algorithm is the

Finite element modeling of spherical indentation in a poro‐elasto‐plastic medium via step displacement loading Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210319
Ming Liu, Haiying HuangA hydromechanically coupled finite element method (FEM) algorithm following a mixed continuous Galerkin formulation for displacement and pore pressure is adopted for modeling of spherical indentation in a poro‐elasto‐plastic medium. The fully saturated porous medium is assumed to be isotropic and elasto‐perfectly plastic, obeying a Drucker‐Prager yield criterion with an associative or non‐associative

Climate‐adaptive design approach for embedded footing under extreme climate event Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210319
Vahidreza Mahmoudabadi, Nadarajah RavichandranRecent records indicate that extreme climate events adversely affect the performance of earthen structures and superstructures supported on them by varying the strength and deformation properties of subsurface soil. To better design such structures, the effects of climate events must be well understood, and the conventional design procedures must be improved by incorporating the knowledge of climatology

A simplified nonlinear coupled Newmark displacement model with degrading yield acceleration for seismic slope stability analysis Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210316
Jian Ji, Chen‐Wei Wang, Hong‐Zhi Cui, Xiao‐Yu Li, Jian Song, Yufeng GaoThe use of Newmark permanent displacement to preliminarily evaluate the seismic performance of earth slopes has been well accepted in geotechnical community. Essentially, the seismic displacement would cause slope soil shear strength to reduce, thus causing the slope yield acceleration to degrade during the earthquake shaking. This phenomenon is known as degrading effect of yield acceleration, which

Cover Image Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210309
Huaxiang Yan, Haijian Xie, Shaoyi Wang, Zijing Zheng 
A procedure to estimate cutoff wall transport properties from monitoring wells Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210302
Giulia Guida, Guido Musso, Gianluigi Sanetti, Claudio di Prisco, Gabriele Della VecchiaOwing to their capability in limiting the transport of pollutants in the subsoil, cutoff walls are popular solutions for the confinement of contaminants. These barriers are often made of soil‐bentonite or cement‐bentonite mixtures, which are characterized by low hydraulic conductivity, low hydrodynamic dispersion, and long‐term durability. However, the aggressive chemical environment to which these

Coupling of non‐ordinary state‐based peridynamics and finite element method for fracture propagation in saturated porous media Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210301
Wei Sun, Jacob FishIn the present manuscript fracture propagation in a saturated porous medium is modeled based on the classical Biot theory, where solid skeleton and fluid flow are represented by separate two layers. The non‐ordinary state‐based peridynamics (NOSBPD) layer is employed to capture deformation including fracturing of the solid skeleton, while the fluid flow is controlled by the finite element method (FEM)

Experimental, analytical, and finite element assessment of the shear strength of concrete‐rock interfaces at different scales Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210219
Sylvain Renaud, Najib Bouaanani, Benjamin MiquelThis paper presents an original analytical approach to assess the shear strength of concrete‐rock interfaces while accounting for the effects of scale, roughness and matching conditions. The technique proposed is based on experimental data obtained from small core samples extracted from existing dam sites, with diameters varying from 83 to 145 mm, and larger rectangular samples with side lengths comprised

An offline multi‐scale unsaturated poromechanics model enabled by self‐designed/self‐improved neural networks Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210216
Yousef Heider, Hyoung Suk Suh, WaiChing SunSupervised machine learning via artificial neural network (ANN) has gained significant popularity for many geomechanics applications that involves multi‐phase flow and poromechanics. For unsaturated poromechanics problems, the multi‐physics nature and the complexity of the hydraulic laws make it difficult to design the optimal setup, architecture, and hyper‐parameters of the deep neural networks. This

A fast contact detection method for ellipsoidal particles Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210212
Elham Kheradmand, Serge Prudhomme, Marc LaforestThis paper presents a fast and robust algorithm for contact detection between elliptical and ellipsoidal particles. The algorithm belongs to the class of geometrical potential methods, which consider the solution of two minimization problems in order to determine a contact point between the particles. The efficiency of the algorithm relies on several ingredients, namely, a transformation that maps

Preconditioners for multiphase poromechanics with strong capillarity Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210212
Julia T. Camargo, Joshua A. White, Nicola Castelletto, Ronaldo I. BorjaThis paper aims to enhance the performance of Newton–Krylov solvers for coupled poromechanical problems with two‐phase flow. In particular, we investigate the impact of capillary pressure on preconditioning strategies. Capillarity complicates the coupling between the solid deformation and fluid pressure degrees of freedom, as well as increases the nonlinearity of the system. Depending on the capillary

Determination of the opening size of granular filters Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210212
Feda Seblany, Eric Vincens, Christophe PicaultGranular filters are used in hydraulic earthen structures as a natural barrier to protect base soils from erosion under seepage conditions. Their performance is greatly dependent on the pore space connectivity that provides transport pathways for migrating fine particles. Traditional filter design rules are based on characteristic particle diameters of the involved materials, which do not explicitly

An anisotropic viscoplasticity model for shale based on layered microstructure homogenization Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201203
Jinhyun Choo, Shabnam J. Semnani, Joshua A. WhiteViscoplastic deformation of shale is frequently observed in many subsurface applications. Many studies have suggested that this viscoplastic behavior is anisotropic—specifically, transversely isotropic—and closely linked to the layered composite structure at the microscale. In this work, we develop a two‐scale constitutive model for shale in which anisotropic viscoplastic behavior naturally emerges

Influence of pore‐like flaws on strength and microcracking behavior of crystalline rock Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201204
Jun Peng, Louis Ngai Yuen Wong, Yahui ZhangPore is a common type of microdefect or flaw in rock or rock‐like material. Predicting the influence of pore‐like flaw on the deformation, strength, and failure behavior of a brittle material is a topic of great interest in the field of geomechanics and geotechnical engineering. In this study, the influences of a group of two‐dimensional circular pore‐like flaws with varied number, position, and size

Permeability stability calculation model of foam‐conditioned soil based on the permeability constant Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201214
Shuying Wang, Shuo Huang, Jiazheng Zhong, Sheng Zhang, Qinxin Hu, Tongming Qu, Xinyu YeThe low permeability of discharged muck must last for at least tens of minutes to avoid water spewing during earth pressure balance (EPB) shield tunneling; however, foam, which is usually added to soil to reduce its permeability, has its own unique time‐varying characteristics. Thus, it is important to predict the stable time of permeability of foam‐conditioned soil for EPB shield tunneling. Based

Probabilistic analysis of a discrete element modelling of the runout behavior of the Jiweishan landslide Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210210
Bing Li, Wenping Gong, Huiming Tang, Zongxing Zou, Victor Mwango Bowa, C. Hsein JuangLandslide is one of the most destructive geohazards around the world. The destruction of a landslide can be estimated from its deformation and runout behaviors, which might be simulated with numerical software such as particle flow code (PFC). In the PFC simulation of the runout behavior of a landslide, the results are dependent upon the particle‐particle contact micro‐parameters (e.g., contact modulus

On the implementation and validation of a three‐dimensional pressure‐dependent bounding surface plasticity model for soil nonlinear wave propagation and soil‐structure interaction analyses Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210204
Wenyang Zhang, Keng‐Wit Lim, S. Farid Ghahari, Pedro Arduino, Ertugrul TacirogluNumerous experiments and prior analyses have confirmed that soil inelasticity, which is known to come into effect even at very low strain levels, can significantly affect site response and dynamic soil‐structure interaction (SSI) behavior. To date, only a few studies were able to consider multi‐axial wave propagation problems with appropriate models of soil nonlinearity. Most existing works are limited

Three‐dimensional lattice Boltzmann simulation of the permeability of soil‐rock mixtures and comparison with other prediction models Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210201
Lei Jin, Tao Cheng, Yi Zhang, Jingjing LiWith the discrete element method and the proposed virtual slicing technique for three‐dimensional discrete element model, random pore‐structural models of soil‐rock mixtures (SRMs) are constructed and voxelized. Then, the three‐dimensional lattice Boltzmann method (LBM) is introduced to simulate the seepage flow in SRMs on the pore scale and the influences of rock content, rock size, relative density

Semi‐analytical analysis of fractional derivative rheological consolidation considering the effect of self‐weight stress Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210201
Pan Ding, Riqing Xu, Luying Ju, Zhijian Qiu, Guangmou Cheng, Xiaobo ZhanStudies have revealed that rheological characteristics and self‐weight stress are nonnegligible during a consolidation process, especially for land reclamation projects or dredged soils. However, they are rarely considered simultaneously in traditional consolidation theories. This paper presents a general solution to the consolidation system of rheological soils that incorporates a fractional derivative

Phase‐field modeling of rate‐dependent fluid‐driven fracture initiation and propagation Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210201
Jie Yang, Hamdi A. Tchelepi, Anthony R. KovscekThe rate‐dependent behavior associated with deformation and fracturing of materials, such as natural rocks, poses significant challenges for modeling. In addition to the complications of the viscoelastic response, the speed of fracture propagation reflects micromechanical mechanisms in the fracture process zone (FPZ). In order to represent these complicated behaviors, a thermodynamically consistent

A homogenization‐based state‐dependent model for gap‐graded granular materials with fine‐dominated structure Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210128
X. S. Shi, Jidong Zhao, Yufeng GaoGap‐graded granular soils are common natural soils composed of cohesionless granular matrix and rock aggregates. Since they are widely used as construction materials worldwide, their deformation behavior is crucial for the design of civil infrastructures. There have been rare constitutive models reported for gap‐graded granular soils in the literature. This study presents a homogenization‐based state‐dependent

Stick‐slip like behavior in shear fracture propagation including the effect of fluid flow Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210115
Tim Hageman, René de BorstShear‐based fracture propagation in fluid‐saturated porous materials is investigated using a displacement–pressure formulation that includes acceleration and inertial effects of the fluid. Pressure‐dependent plasticity with a nonassociated flow rule is adopted to realistically represent the stresses in the porous bulk material. The domain is discretized using unequal order T‐splines and cast into a

An analytical model for the interaction between two dissimilar piles in a finite soil layer Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210114
Huan Liu, Qijian LiuAn analytical method is developed for the interaction between two dissimilar piles subjected to vertical loadings in a finite soil layer with a rigid base. A fictitious soil column is assumed for the corresponding shaft and the moduli of the soil–pile rod are expressed as a Heaviside step function of the modulus. The vertical soil displacements and the shaft resistances are calculated as the combined

Bifurcation analysis of shear band in sand under true triaxial conditions with hypoplasticity Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210112
Wei Zhang, Shun Wang, Yang Wu, Wei WuPredicting the onset of shear band is of significance in understanding the failure of geomaterials. The prediction accuracy is dictated by the constitutive model used for the description of the pre‐bifurcation behaviour. In this study, we first modify a recently proposed hypoplastic constitutive model by incorporating a general strength criterion and a stiffness function. We proceed to consider the

Discrete geometric modeling of granular soils based on statistical percolative principles: A 2D implementation Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210112
Shmulik Pinkert, Yuval LaromThis study proposes a new geometric modeling approach for a discrete representation of a realistic pore‐scale morphology by using an amorphous, non‐Euclidean, geometry of the shape of soil grains. The soil‐skeleton composition process follows a consistent, statistically based, algorithm by implementing ideas derived from both fractal and percolation theories. Although the model yields random amorphous

A cover‐based contact detection approach for irregular convex polygons in discontinuous deformation analysis Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201115
Xiaoying Zhuang, Fei Zheng, Hong Zheng, Yu‐Yong Jiao, Timon Rabczuk, Peter WriggersIrregular polygon shapes (eg, with small edges or small angles) are usually encountered in the contact simulation of discrete block systems. Treatment of irregular polygons in contact detection process has critical effects on the robustness and efficiency of the discontinuous computation approach. The present work proposes a cover‐based strategy to detect and solve contacts of irregular convex polygons

Effect of gas content in macropores on hydraulic fracturing in rocks using a fully coupled DEM/CFD approach Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201115
M. Krzaczek, M. Nitka, J. TejchmanThe paper focuses on the effect of the gas content in rock macropores on a hydraulic fracturing process. The process was simulated by combining the discrete element method (DEM) with computational fluid dynamics (CFD) under two‐dimensional (2D) isothermal conditions. The mechanical behavior of the rock matrix was simulated with DEM, and CFD was used for describing the behavior of laminar two‐phase

3D failure envelope of a rigid pile embedded in a cohesive soil using finite element limit analysis Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201205
Noussaiba Graine, Mohammed Hjiaj, Kristian KrabbenhoftIn this paper, numerical limit analysis is applied to evaluate the bearing capacity of a single rigid pile embedded in a ponderable homogeneous cohesive‐frictionless soil subjected to vertical, horizontal, and moment (VHM) loading combinations. All loads act in the same plane. Accurate lower and upper bounds are calculated using finite element limit analysis code OPTUM G3 . As the gap between the bounds

Thermo‐poroelastic responses of a pressure‐driven fracture in a carbon storage reservoir and the implications for injectivity and caprock integrity Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210105
Pengcheng Fu, Xin Ju, Jixiang Huang, Randolph R. Settgast, Fang Liu, Joseph P. MorrisCO2 injection into a reservoir with marginal permeability (≲ 10−14 m2) could induce pressure high enough to fracture the reservoir rock and/or caprock. A pressure‐driven fracture can immensely enhance the injectivity and would not compromise the integrity of the overall storage complex as long as the fracture is contained vertically. Conventional models for geologic carbon storage simply treat fractures

Time‐resolved model for geothermal engineering in high porosity Slochteren sandstone Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210105
Aditya Singh, Peter A. FokkerThis work is an extension of the time‐resolved poro‐elasto‐plastic Mohr‐Coulomb model by Fokker et al to include a more realistic constitutive model. Experiments on Slochteren sandstone revealed that the inelastic deformation contributes significantly in compressive deformation almost in all stages of loading and instigated the development of a Cam‐Clay‐like model to reproduce the Slochteren sandstone

Scatterer identification in a 2D geophysical medium using an augmented computational time reversal method Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20210101
Daniel Rabinovich, Dan Givoli, Jacobo Bielak, Eli TurkelThe problem of identifying an obstacle (scatterer) in the form of a cavity in a 2D geophysical medium is considered. This is posed as an inverse wave problem, where the location of the cavity is sought based on measurements of the elastic waves recorded by sensors located at certain points in the domain. The sensor measurements are noisy, and are generated synthetically as a first step. The inverse

Formulation of a new elastoviscoplastic model for time‐dependent behavior of clay Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201231
Yixing Yuan, Andrew J. WhittleThis paper presents a generalized, elastoviscoplastic constitutive model, MIT‐SR, that is capable of describing a wide range of time‐dependent characteristics observed in clays from creep to strain‐rate‐dependent shear behavior. The key component of the proposed model is a novel evolution equation that attributes viscoplastic deformations to a state variable, Ra, referred to as internal strain rate

Noncoaxiality considering inherent anisotropy under various loading paths in a strain space multiple mechanism model for granular materials Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201229
Kyohei Ueda, Susumu IaiInherent anisotropy is a crucial aspect to consider to improve one's understanding of the behavior of granular materials, in particular, noncoaxial responses under proportional and nonproportional loadings. This article investigates the capability of a strain space multiple mechanism model to reproduce complex responses of inherently anisotropic soils under various loading paths. The constitutive model

Calibration and validation of a new elastoviscoplastic soil model Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201227
Yixing Yuan, Andrew J. WhittleThis paper presents the calibration and validation for a new 3D elastoviscoplastic soil model, MIT‐SR, for Resedimented Boston Blue Clay (RBBC). The calibration procedure requires selection of material constants from standard types of laboratory consolidation and undrained shear tests, and a procedure for initialization of state variables. The formulation includes two key input parameters that describe

Probabilistic analysis of overall strength of a cement‐treated soil column considering statistical uncertainty and spatial variability Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201227
Tsutomu NamikawaA finite‐element method (FEM) analysis incorporating with random field theory is a powerful tool to predict the behavior of ground improvement by deep cement mixing with spatial variability. In the analysis, statistical parameters of the strength (i.e., mean, variance, and autocorrelation distance) are normally held constant. However, these parameters involve a statistical uncertainty when evaluated

Micromechanical‐based experimental and analytical studies on rate effects and stick‐slip instability of smooth quartz surfaces in the presence of plastic and non‐plastic gouges Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201227
Sathwik S. Kasyap, Kostas SenetakisWe examined with micromechanical‐based experiments the influence of shearing rate on the tangential contact behavior of smooth (very low surface roughness) flat quartz surfaces with montmorillonite and crushed aggregates as gouges. On decreasing the shearing rate by one order of magnitude, significant changes in the stick‐slip instability were observed; increase in force‐drop, recurrence interval and

One‐dimensional consolidation of layered soils under ramp load based on continuous drainage boundary Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201227
Xiaoyan Yang, Mengfan Zong, Yi Tian, Guosheng Jiang, M. Hesham El Naggar, Wenbing Wu, Meijuan XuThe traditional drainage boundary regards the drainage boundary as completely permeable or completely impervious. However, the drainage boundary is an impeded drainage boundary between completely permeable and impervious in engineering practice. In view of this, a new drainage boundary, namely the continuous drainage boundary, is introduced in this paper to study the consolidation problem of layered

A micro‐macromechanical compression model of crushing in granular materials based on a probabilistic approach and energy aspects Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201227
Tianliang Zheng, Erxiang SongThis paper presents a micro and macromechanical model to estimate the grading evolution and plastic strain caused by particle crushing in the isotropic compression of granular materials. A joint‐probability particle crushing criterion of the maximum contact force and the particle strength is proposed to calculate the incremental particle crushing probability. The dependence of the contact force and

A coupled SPFEM/DEM approach for multiscale modeling of large‐deformation geomechanical problems Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201222
Ning Guo, Zhongxuan Yang, Weihai Yuan, Jidong ZhaoComputational modeling in geotechnical engineering frequently needs sophisticated constitutive models to describe prismatic behavior of geomaterials subjected to complex loading conditions, and meanwhile faces challenges to tackle large deformation in many geotechnical problems. The study presents a multiscale approach to address both challenges based on a hierarchical coupling of the smoothed particle

Prediction and numerical simulation of the face‐slab extrusion damage of Dashixia concrete faced rock‐fill dam Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201222
Sheng Zhu, Zhiyuan Ning, Jing WangOne of the core issues affecting the safety of high concrete faced rock‐fill dams (CFRDs) is the extrusion damage of the concrete face slabs. In this paper, the causes of the face‐slab extrusion damage under long‐term operational conditions are studied. It is found that not only the creep behavior of the dam materials but also the circulating water load in the reservoir is responsible for the uneven

A two‐dimensional analytical model for organic contaminant transport in cutoff wall and aquifer system Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201221
Huaxiang Yan, Haijian Xie, Shaoyi Wang, Zijing ZhengCutoff walls are widely used as in‐situ geoenvironmental barriers to isolate the contaminants caused by landfill leakage, chemical storage tank accidents, and mining activities. A two‐dimensional analytical solution is developed to investigate the behavior of organic chemical transport in cutoff wall and aquifer. The method of Laplace transforms and finite Fourier cosine transform is adopted to derive

Simulation of coupled multiphase flow and geomechanics in porous media with embedded discrete fractures Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201205
Matteo Cusini, Joshua A. White, Nicola Castelletto, Randolph R. SettgastIn fractured natural formations, the equations governing fluid flow and geomechanics are strongly coupled. Hydrodynamical properties depend on the mechanical configuration, and they are therefore difficult to accurately resolve using uncoupled methods. In recent years, significant research has focused on discretization strategies for these coupled systems, particularly in the presence of complicated

A three‐dimensional multiscale damage‐poroelasticity model for fractured porous media Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20201205
Mahdad Eghbalian, Mehdi Pouragha, Richard WanThe paper investigates the failure of brittle rocks within a multiscale/multiphysics computational modeling framework so as to explicitly incorporate both microstructural and hydromechanical aspects in their overall (nonlinear) fracture behavior. Herein, the rock is idealized as a microfissured porous medium via a representative elementary volume (REV) containing distributed oblate spheroidal open

Transverse and longitudinal fluid flow modelling in fractured porous media with non‐matching meshes Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20200925
Behnam V. Damirchi, Marcelo R. Carvalho, Luís A. G. Bitencourt, Osvaldo L. Manzoli, Daniel Dias‐da‐CostaA new discrete fracture model is introduced to simulate the steady‐state fluid flow in discontinuous porous media. The formulation uses a multi‐layered approach to capture the effect of both longitudinal and transverse permeability of the discontinuities in the pressure distribution. The formulation allows the independent discretisation of mesh and discontinuities, which do not need to conform. Given

An efficient transient‐state algorithm for evaluation of leakage through defective cutoff walls Int. J. Numer. Anal. Methods Geomech. (IF 2.814) Pub Date : 20200927
Yutao Pan, Michael A. Hicks, Wout BroereArtificial barriers are widely used to prevent leakages. However, due to construction errors during the wall installation, passages with small dimensions may occasionally penetrate through the barrier, undermining its tightness. A three‐dimensional discretized algorithm (TDA) is proposed for quantitatively estimating the transient‐state discharge rate through defective cutoff walls. By discretizing