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Fundamental solutions to the transversely isotropic poroelastodynamics Mandel's problem Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210724
Chao LiuMany geomaterials, such as shale, and biomaterials, including human bone and cartilage, are anisotropic. Understanding the dynamic responses of such anisotropic porous media is essential in field operations and laboratory measurements. This paper presents analytical solutions to the transversely isotropic poroelastodynamics Mandel's problem, using the Fourier transform method and Cardano formula to

Methodology for the nonlinear coupled multiphysics simulation of mineral dissolution Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210722
Li Li, Endrina Rivas, Robert Gracie, Maurice B. DusseaultThis article presents a numerical methodology for the simulation of mineral dissolution which couples brine flow, dissolved mineral transport, and cavity evolution. The proposed model considers both (1) the varying density brine flow within the cavity governed by the compressible NavierStokes equations and (2) the evolution of the cavity boundary using a sharp interface model with a physicallyderived

Spherical cavity expansion in porous rock considering plasticity and damage Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210720
Linchong Huang, Jiguan Liang, Jianjun Ma, Hongwei Yang, Yilin GuiIn rock engineering, damage evolution upon loading imposes significant impacts on the stiffness of rock mass and its deformation characteristics. In order to investigate the influence of both damage and plasticity on cavity expansion, a plastic damage solution is derived for undrained spherical cavity expansion in rock medium. For the consideration of plasticitydamage, Modified CamClay (MCC) model

Reloading in barodesy employing the asymptotic state boundary surface Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210713
Manuel Bode, Wolfgang Fellin, Gertraud MedicusThe reloading behaviour of the soil is dominated by effects of the recent deformation history as well as by the overall stress history, indicated by overconsolidation. The stiffness of an overconsolidated soil is higher than the stiffness of normally consolidated soil. In basic hypoplastic and barodetic models, the stiffness for reloading is underestimated, and thus socalled ratcheting effects appear

A fractional differential scheme for the effective transport properties of multiscale reactive porous media: Applications to clayey geomaterials Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210713
Philippe Cosenza, Richard Giot, Albert Giraud, Stephen HedanA new homogenization scheme is proposed to model the effects of surface phenomena occurring at the pore fluid/solid interface on the effective transport properties of multiscale and reactive geosystems, e.g., clayey geomaterials. This new scheme is a generalization of the socalled differential scheme (DS) used to infer the effective properties of a composite made up of several materials. It is named

A hybrid LaplaceGalerkin method for thermohydromechanical coupling in fluid saturated porous media: Application for borehole problems Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210712
Tuan NguyenSy, MinhNgoc Vu, ThoiTrung NguyenA hybrid LaplaceGalerkin method is proposed for modeling thermohydromechanical coupled problems of fluid saturated porous media in unsteady state regime. It consists of transforming the weak form equations into the Laplace space where they are solved by the Galerkin finite element method. Results in time space are then obtained by the Stehfest method of inverse Laplace transformation. This technique

Simulation of buried cylindrical/spherical explosions in a soil medium using the semianalytical solution of a cavity expansion problem Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210708
Vladimir R. Feldgun, David Z. Yankelevsky, Yuri S. KarinskiThe existing literature on the dynamic spherical/cylindrical cavity expansion (CCE) due to pressure loading at the cavity boundary, shows that all the analytical solutions deal with constant pressure only. A general solution is developed for the nonstationary dynamic problem of a cavity expansion, due to prescribed pressure timehistory applied at the cavity boundary. This solution can be applied

Simplified geotechnical rheological model for simulating viscoelastoplastic response of ballasted railway substructure Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210706
Piyush Punetha, Sanjay Nimbalkar, Hadi KhabbazA proper understanding of the mechanical behaviour of the substructure layers is crucial for optimising the design and performance of a ballasted railway track. The recent advent of highspeed trains and heavy haul freight wagons has heightened this need more than ever. The accurate prediction of the longterm performance of the railway tracks under increased speed and loads still remains an intriguing

Indirect boundary element method for modelling 2D poroelastic wave diffraction by cavities and cracks in half space Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210706
Shuaijie Sun, Zhongxian Liu, Alexander H.D. ChengAn indirect boundary element method (IBEM) is developed to solve twodimensional (2D) wave diffraction by cavities and cracks in a fluidsaturated poroelastic half space. The dynamic Green's functions of forces and fluid source in a poroelastic fullspace, rather than their halfspace counterparts, are utilized, because of their closedform expressions. The diffracted wave field is constructed by

Threedimensional slope stability predictions using artificial neural networks Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210621
Jingjing Meng, Hans Mattsson, Jan LaueTo enable assess slope stability problems efficiently, various machine learning algorithms have been proposed recently. However, these developments are restricted to twodimensional slope stability analyses (plane strain assumption), although the twodimensional results can be very conservative. In this study, artificial neural networks are adopted and trained to predict threedimensional slope stability

Transient wave propagation in a multilayered soil with a fluid surface layer: 1D analytical/semianalytical solutions Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210621
Zhendong Shan, Liping Jing, Lei Zhang, Zhinan Xie, Daosheng LingThis paper studies onedimensional transient wave propagation in a saturated multilayered soil with a fluid surface layer. Based on Biot theory, the eigenfunction expansion method, the transfer matrix method, the statespace method, and the precise time step integration method are employed to develop analytical/semianalytical solutions. For a special case (large dynamic permeability coefficient)

Elastoviscoplastic modelling with distorted isotaches and swelling for constant strain rate and incremental loading Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210618
Thomas A. Vergote, C. F. Leung, S. C. ChianA novel elastoviscoplastic model is proposed to improve the modelling of the onedimensional unloading response of soils. Creep is modelled as an isotache process, but with the possibility to incorporate distortion of the isotaches after unloading. Upon unloading, swelling develops as a transient superimposed process that enables the sequential occurrence of swelling and creep as observed in experiments

Nonlinear consolidation of soft foundation improved by prefabricated vertical drains based on elliptical cylindrical equivalent model Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210618
Yi Tian, Wenbing Wu, Minjie Wen, Guosheng Jiang, M. Hesham El Naggar, Guoxiong MeiThis study builds up an elliptical cylindrical equivalent model (ECEM) of prefabricated vertical drains (PVD)improved foundation which incorporates the nonlinear variation of compressibility and permeability and the preconsolidate state of soil. An exact solution and a simplified solution are derived for the nonlinear consolidation model under a combined vacuum and surcharge preloading. Considering

Threedimensional ridge collapse mechanism for narrow soil slopes Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210618
Radoslaw L. Michalowski, Dowon ParkThreedimensional analysis of stability is carried out for slopes with the failure mechanism confined to a narrow space. A curvilinear cone failure surface is modified by removing a slice from its central portion, to make the failure mechanism fit in the narrow space. The resulting surface is no longer smooth, and it is referred to as the ridge mechanism for a distinct ridge in the failure surface

Investigation of microcracking behaviors in brittle rock using polygonal grainbased distinct method Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210617
Zhao Wang, Tiehang Wang, Saisai Wu, Yanzhou HaoThe failure process in brittle rocks is an important topic in rock mechanics, whose good understanding assists in predicting the strength and deformation characteristics of rocks. Because it is difficult to directly observe microcracks in laboratory tests, a numerical model is a useful tool for investigating microcracking behaviors. However, the mechanism of microcrack evolution is still unclear at the

Stress evolution in elastically heterogeneous and nonlinear fluidsaturated media with a Green's function approach Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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 nonlinear, and elastically heterogeneous problems on fluidsaturated media. The 2D Kelvin's solution for a homogeneous space is considered here for simplicity sake. The material nonlinearity could be due to irreversible deformations or nonlinear elasticity response typical of 4D analysis as it is done here

Soilstructure interface modeling with the nonlinear incremental approach Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210422
Jie Yang, ZhenYu YinThis paper aims to develop the nonlinear incremental modeling approach for describing both monotonic and cyclic behaviors of the soilstructure 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 stressdilatancy relation is developed for the shearinduced change of interface thickness

An extended numerical manifold method for unsaturated soilwater interaction analysis at microscale Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210417
Hao Sun, Zhijun Wu, Liange Zheng, Yongtao Yang, Da HuangTo investigate unsaturated soilwater interaction at microscale, this study extends the numerical manifold method (NMM) by incorporating a soilwater 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

The deformation and failure of strip footings on anisotropic cohesionless sloping grounds Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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 underdesign of foundations. A numerical investigation on the

Numerical modeling of thermomechanical failure processes in granitic rock with polygonal finite elements Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210616
Timo SaksalaThis paper considers numerical modeling of intensive heating induced thermomechanical failure processes in granitic rock. For this end, a numerical method based on polygonal finite elements and a damageplasticity model is developed. A staggered scheme is employed to solve the global thermomechanical problem. The rock failure is described by a RankineMohrCoulomb plasticity model with separate scalar

DRPCTS: A digital computation theory framework system for rock property parameters using microCT images Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210612
Zhi Zhao, XiaoPing ZhouRock properties evaluations play decisive roles in various geotechnical engineering programs. This work aims at establishing a digital rock parameters computation theory framework system (DRPCTS) to rapidly and accurately obtain the common porescale, hydraulic, and thermophysical variables by microCT images. The proposed package contains the codes for the porescale, hydraulic, and thermophysical

Dynamic site response analysis in the face of uncertainty–an approach based on response surface method Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210609
Wenxin Liu, C. Hsein Juang, Qiushi Chen, Guoxing ChenAlthough advanced modeling techniques such as the finite element method (FEM) have been used successfully in dynamic site response analysis, the high computational expense has hindered the incorporation of input parameter uncertainty in such analysis. Thus, when the variation of the peak ground acceleration (PGA) at the ground surface, which is the outcome of the site response analysis, has to be evaluated

Investigation of liquefactioninduced lateral spreading of gently sloping grounds using a variable permeability model Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210529
Mahmood Malekmakan, Hadi Shahir, Peyman AyoubiLiquefactioninduced lateral spreading takes place on gently sloping grounds due to the liquefaction of sand layers during an earthquake. This phenomenon had catastrophic effects in past events such as the 1964 Niigata, Japan earthquake. In this study, a recently proposed variable permeability function along with a critical state twosurface plasticity model is employed in a fullycoupled dynamic numerical

Numerical investigation of flow control technology for grouting and blocking of flowing water in karst conduits Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210526
Zhenhao Xu, Dongdong Pan, Peng Lin, Qingsong Zhang, Haiyan Li, Yichi ZhangA sequential flow and solidification method was applied to the numerical investigation of flow control technology for grouting and blocking of flowing water in karst conduits. This method accounted for the temporal and spatialevolution characteristics of the viscosity. It achieved the visualization of grouting in flowing water in a conduit, and was used to explore a reasonable and effective method

Relationships between gradation and deformation behavior of dense granular materials: Role of highorder gradation characteristics Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210524
Jizhong He, Fang Liu, Gang Deng, Pengcheng FuThis paper numerically investigates deformation behavior of coarsegrained granular materials with emphasis on the effect of grain size distribution (GSD). Biaxial compression tests are simulated in two dimensions using distinct element method (DEM) on a set of samples composed of uncrushable spheres following a wide variety of GSDs. The results prove that highorder characteristics of gradation, such

A complex variable solution for a noncircular tunnel in an elastic halfplane Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210524
Aizhong Lu, Guisen Zeng, Ning ZhangAn analytical solution for a noncircular tunnel excavated in an elastic homogeneous halfplane is obtained, which considers gravity and different lateral pressure coefficients. The solution is deduced using the complex variable method, mapping the region containing a noncircular tunnel onto a circular ring. The basic equations for the analytic functions are established using the stress boundary conditions

Adaptive anisotropic constitutive modeling of natural clays Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210524
Hesam Dejaloud, Mohammad RezaniaIn this paper, an adaptive anisotropic constitutive model, namely AA1CLAY, is developed for clays based on the critical state framework. The model has a nonassociated flow rule, and it can also reduce to basic critical state constitutive models. A versatile yield surface (YS) is implemented in the model which can generate a broad range of shapes to improve the possibility of capturing experimental

Growth of slip surfaces in 3D conical slopes Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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

Solutions for onedimensional consolidation of unsaturated soil with general boundary conditions subjected to timedependent load Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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 onedimensional consolidation of singlelayer unsaturated soil with general boundary conditions, arbitrary initial conditions and timedependent 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 4.264) Pub Date : 20210429
Yuanqin Tao, Honglei Sun, Yuanqiang 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 datadriven approach to infer the spatially varying parameter of the modified Camclay model from limited field observations and subsequently improves soil settlement predictions

Upscaling critical state considering the distribution of mesostructures in granular materials Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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 timedependent behavior and its application Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210427
Pin Zhang, YinFu Jin, ZhenYu 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

Radial consolidation analysis of unsaturated soil with vertical drains under various cyclic loadings Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210415
Pyol Kim, MyongChol Ri, KilSang Ri, MyongChol Rim, SongGuk 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 4.264) 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 planestrain hydraulic fracture driven by a shearthinning Carreau fluid Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210415
Lucas Pereira, Brice LecampionWe study the propagation of a planestrain 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 shearthinning properties of the fluid between the low and high shearrates 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 4.264) 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

Symmetric high order microplane model for damage localization and size effect in quasibrittle materials Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210326
Erol Lale, Gianluca CusatisThis paper presents the socalled symmetric highorder microplane (SYHOM) model for the simulation of damage localization and size effect in quasibrittle 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 4.264) 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 semiimplicit material point method based on fractionalstep method for saturated soil Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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

Climateadaptive design approach for embedded footing under extreme climate event Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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

Finite element modeling of spherical indentation in a poroelastoplastic medium via step displacement loading Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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 poroelastoplastic medium. The fully saturated porous medium is assumed to be isotropic and elastoperfectly plastic, obeying a DruckerPrager yield criterion with an associative or nonassociative

A simplified nonlinear coupled Newmark displacement model with degrading yield acceleration for seismic slope stability analysis Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210316
Jian Ji, ChenWei Wang, HongZhi Cui, XiaoYu 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 4.264) 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 4.264) 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 soilbentonite or cementbentonite mixtures, which are characterized by low hydraulic conductivity, low hydrodynamic dispersion, and longterm durability. However, the aggressive chemical environment to which these

Coupling of nonordinary statebased peridynamics and finite element method for fracture propagation in saturated porous media Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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 nonordinary statebased 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 concreterock interfaces at different scales Int. J. Numer. Anal. Methods Geomech. (IF 4.264) Pub Date : 20210219
Sylvain Renaud, Najib Bouaanani, Benjamin MiquelThis paper presents an original analytical approach to assess the shear strength of concreterock 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 multiscale unsaturated poromechanics model enabled by selfdesigned/selfimproved neural networks Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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 multiphase flow and poromechanics. For unsaturated poromechanics problems, the multiphysics nature and the complexity of the hydraulic laws make it difficult to design the optimal setup, architecture, and hyperparameters of the deep neural networks. This

A fast contact detection method for ellipsoidal particles Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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 4.264) 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 twophase 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 4.264) 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

Influence of pore‐like flaws on strength and microcracking behavior of crystalline rock Int. J. Numer. Anal. Methods Geomech. (IF 4.264) 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 4.264) 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 4.264) 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 4.264) 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 4.264) 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 4.264) 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 4.264) 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 4.264) 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 4.264) 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 4.264) 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