Numerical Modelling of Desiccation Cracking of Clayey Soil by Using Cohesive Fracture Method

Vo, Thi Dong; Pouya, Ahmad; Hemmati, Sahar; Tang, Anh Minh

doi:10.1007/978-981-10-6713-6_75

Cited by 12 publications

(16 citation statements)

References 12 publications

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“…e boundary of model can also be considered to be a crack [73], which decreases the efforts to predict the cracking process. A hydromechanical model was developed by Vo et al [86] on the purpose of simulating the desiccation cracking in clayey soils with a cohesive fracture method. In Advances in Civil Engineering this model, the damage-elastic behavior with cohesive fracture was analyzed.…”

Section: Analysis Of Cracks In Clayey Soils With Numerical Modeling Mmentioning

confidence: 99%

A Review of Cracking Behavior and Mechanism in Clayey Soils Related to Desiccation

Wei

Gao

Liu

2020

Advances in Civil Engineering

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Cracks in clayey soils are common during desiccation. The presence of cracks significantly alters the mechanical and hydraulic properties of soils. The objective of this article is to summarize the works on cracking behavior and mechanism in clayey soils related to desiccation. Historical field investigations, laboratory experimentations, identified mechanisms, and numerical approaches for modeling the process of cracking during desiccation are discussed. The experimental approaches for interpreting the mechanisms of cracking are systematically summarized and comprehensively reviewed based on the in situ observations and laboratory experimentations from the literature. The soil mechanics-based approaches resumed in this article according to the fracture mechanics theory and numerical results highlight the cracking development mechanism. Concerning the plasticity characteristics of clayey soils, researches on soil fracture mechanics should be paid more attention. More in situ experimentations and numerical researches are suggested for future researches to better understand the cracking behavior and mechanism in clayey soils related to desiccation.

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Section: Analysis Of Cracks In Clayey Soils With Numerical Modeling Mmentioning

confidence: 99%

A Review of Cracking Behavior and Mechanism in Clayey Soils Related to Desiccation

Wei

Gao

Liu

2020

Advances in Civil Engineering

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“…Normally, the soil modulus changes with water content and suction during drying. However, Vo et al (2017) suggested that a constant value soil modulus would be adequate to predict the development of soil shrinkage, which is the main mechanism related to crack initiation. The relation between total stress, pore-fluid pressure and strain is expressed by the following equation:…”

Section: Governing Equationmentioning

confidence: 99%

Modelling desiccation crack geometry evolution in clayey soils by analytical and numerical approaches

Pouya

Hemmati

et al. 2019

Can. Geotech. J.

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In the present work, the development and geometry of desiccation cracks are studied by using a finite element code including cohesive joints elements. The numerical results show that cracking occurs sequentially to form different crack families. The propagation of each crack at the onset suddenly reaches an ultimate depth. The cracks in each family appear simultaneously and reach an identical ultimate depth. From the numerical results and additional analytical analysis, empirical correlations are proposed to predict the spacing and crack depth as a function of suction applied on the top surface, the soil parameters, and the desiccation rate. The proposed model shows that higher suction is required to initiate cracks at a higher value of soil tensile strength. In addition, there is a general trend of larger spacing and deeper cracks for a slower desiccation rate. Finally, empirical relations are evaluated by comparing them with in situ experimental observations published previously.

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“…Simulations are performed with the finite element code Porofis , which is a research code derived from the commercial code DISROC built for coupled hydromechanical processes in porous fissured materials. The equations used in this paper, for governing hydraulic flow and mechanical deformation in cracked and unsaturated porous materials, have been presented in detail in previous papers . They are here briefly summarized.…”

Section: Numerical Approachmentioning

confidence: 99%

Modeling soil desiccation cracking by analytical and numerical approaches

Pouya

Hemmati

et al. 2018

Num Anal Meth Geomechanics

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Summary An energy approach is proposed as a complement to the stress approach commonly considered for investigating soil desiccation cracking. The elastic strain energies before and after crack initiation are estimated by both numerical and analytical solutions. The energy released by cracking is then compared with the fracture energy to discuss crack initiation conditions. This leads to combined energy and stress conditions for crack initiation following Leguillon's theory. An approximate analytical solution is derived from a variational formulation of the porous elastic body equations. A cohesive zone model and finite element code are used to simulate crack propagation in an unsaturated porous body. This analysis shows that the energy criterion is reached before the stress criterion, and this can explain unstable crack propagation at the beginning. The approximate analytical solution allows predicting correctly the crack depth and opening in its initiation stage.

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Numerical Modelling of Desiccation Cracking of Clayey Soil by Using Cohesive Fracture Method

Cited by 12 publications

References 12 publications

A Review of Cracking Behavior and Mechanism in Clayey Soils Related to Desiccation

A Review of Cracking Behavior and Mechanism in Clayey Soils Related to Desiccation

Modelling desiccation crack geometry evolution in clayey soils by analytical and numerical approaches

Modeling soil desiccation cracking by analytical and numerical approaches

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