Numerical modelling of desiccation shrinkage and cracking of soils

Cheng, Wenqing; Bian, Hanbing; Hattab, Mahdia; Yang, Zhengtian

doi:10.1080/19648189.2022.2140208

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…These limitations drive the need for specialized techniques and alternative numerical methods to overcome these challenges and improve the accuracy of simulations. FEM [23,24,26,32,34] and its variant Extended Finite Element Method (XFEM) [42] have been extensively used for simulating desiccation cracks in clayey soils at a macroscale level and can also be applied at micro-and mesoscale levels. Researchers have employed FEM to study moisture diffusion, shrinkage, and cracking behavior during drying.…”

Section: The Finite Element Methods (Fem)mentioning

confidence: 99%

Review of Methods to Solve Desiccation Cracks in Clayey Soils

Levatti

2023

Geotechnics

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This paper reviews numerical methods used to simulate desiccation cracks in clayey soils. It examines five numerical approaches: Finite Element (FEM), Lattice Boltzmann (LBM), Discrete Element (DEM), Cellular Automaton (CAM), and Phase Field (PFM) Methods. The paper presents a simplified description of the methods, including their basic numerical formulations. Several factors such as the multiphase nature of soils, heterogeneity, nonlinearities, coupling, scales of analysis, and computational aspects are discussed. The review highlights the characteristics, strengths, and limitations of each method. FEM shows a good capacity to deal with the thermo-hydromechanical behavior of clays when drying that complement well with the ability of DEM to deal with particle interactions as well as LBM, PFM, and CAM to deal with complex crack patterns. The article concludes by reviewing the integration of multiple numerical methods to enhance the simulation of desiccation cracks in clayey soils and proposing what is the best option to continue improving the study of this problem.

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Section: The Finite Element Methods (Fem)mentioning

confidence: 99%

Review of Methods to Solve Desiccation Cracks in Clayey Soils

Levatti

2023

Geotechnics

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“…Fredlund et al (1977) proposed that the constitutive analysis of soil behaviour can depend on the stress state variables. In the constitutive framework of the stress state variables, the use of two independent stress state variables will enable the decomposition of total strain into drying shrinkage induced part due to water mass removal, and a mechanical part due to the total stress variation (Péron et al, 2009b;Cheng et al, 2023). Using this method, the drying shrinkage of clay can be simulated as an independent part, the total strain is divided into two parts and described separately, it is more intuitive and easier to operate.…”

Section: Introductionmentioning

confidence: 99%

“…The mechanical behavior of clay materials is complex, one of the difficulties is that it is sensitive to water, clayey soil becomes hard and fragile after desiccation due to its fine particle size and high water content (Guggenheim et al, 1995;Cheng et al, 2023). Clayey soil desiccation shrinkage is widespread in nature and it significantly affects the mechanical behavior of the soil, including disintegration, permeability, residual shear, tensile strength, etc (Cheng et al, 2022;Xu et al, 2023), which in practice can compromise the sustainability of geotechnical structures as mentioned in different studies reported in the literature (El Mountassir et al 2011;Wang et al, 2016;Ye and Ma 2019).…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical modelling of desiccation of clayey soils

Cheng,

Bian,

Gao

et al. 2024

Preprint

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The desiccation of clayey soils is widespread in nature and it significantly affects the mechanical behavior of the soil, which in practice can compromise the sustainability of geotechnical structures. The desiccation of clayey soils should first be studied, as a basis for recherche the mechanism of cracking. In current research, the combined numerical simulation and experiments research were conducted for investigating the desiccation of clayey soils. The desiccation experiments of fully saturated slurry and pre-consolidation clayey soils are analyzed and simulated. The material properties are first introduced. Then, the experiments are introduced and analyzed, the numerical model parameters are identified. The constitutive model of clayey soils is established and the numerical simulation of the desiccation is realized by using finite element method, the approach permitted to estimate how, from the fully saturated state to the completely dry state, both deformations, suction and the stresses developed in the sample. Finally, the proposed numerical approach is validated by reproducing the desiccation experiments. The numerical results show that the numerical simulations are in good agreements with the experimental observations. A deeper understanding of the formation mechanism of desiccation of clayey soils is obtained by using a combination of numerical simulation and experiments.

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XFEM Composite Failure Criterion and Slope Failure Simulation Based on ABAQUS

Li,

Cheng,

2024

Lecture Notes in Civil Engineering

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Conventional numerical methods face major challenges in simulating the complex failure process of soil slopes effectively and accurately. This paper introduces a tension-shear composite failure criterion that elucidates the compound failure mechanisms of soil slopes, realized in the ABAQUS software through the secondary development of a user subroutine and simulated via the extended finite element method (XFEM) module. This method is utilized to simulate the process of soil slope failure under conditions that include heaping load at the crest and excavation at the toe, accompanied by analyses of the failure patterns. The methodology's validity and accuracy are substantiated through comparison with experimental data. The proposed approach adeptly captures the initiation, propagation, and ultimate penetration of cracks during the slope failure process, offering an effective method for simulating the entire slope failure.

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Numerical modelling of desiccation shrinkage and cracking of soils

Cited by 7 publications

References 24 publications

Review of Methods to Solve Desiccation Cracks in Clayey Soils

Review of Methods to Solve Desiccation Cracks in Clayey Soils

Experimental and Numerical modelling of desiccation of clayey soils

XFEM Composite Failure Criterion and Slope Failure Simulation Based on ABAQUS

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