Numerical modelling of desiccation cracking of clayey soil using a cohesive fracture method

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

doi:10.1016/j.compgeo.2016.12.010

Cited by 78 publications

(18 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mathematical model of complex fracture network is based on Palmer model [16]. According to the fracture mechanics, the mathematical model of complex fracture network was established, and the main formulas and equations as follows.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Numerical simulation is another effective way to understand the mechanism of fracture propagation, many researchers have studied the fracture propagating mechanism by using 2D or 3D numerical models [1,14,16]. In multistage fracturing technology, the stress concentration have an impact on the fracture initiation and propagation of the subsequent stage under closer cluster space.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simulation Research and Application of Complex Fracture Network for SRV

Sun¹,

Liu²,

Zheng³

et al. 2019

Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)

View full text Add to dashboard Cite

Stimulated Reservoir Volume (SRV) is one of new emerging hydraulic fracturing techniques to develop shale gas, tight sandstone and other unconventional reservoirs. The favorable geological conditions and reasonable fracturing design are critical factors to form complex fracture network that is different from conventional bi-wing fracture. In the reservoir, conductivity and drainage space can be enhanced by the fracture network. At present, numerical simulation of complex fractures is still based on the pseudo-3D model and depend on huge amount of calculation to obtain the fracture network. Therefore, this method has distinct differences in actual propagation and need to be computed intensively. Applying the theory of mechanics of materials and fracture mechanics, the equations of expansion and propagation for natural fracture are derived and the equation of stress shadow is adopted to consider the additional normal stress induced by adjacent fractures. Based on the propagation pressure, the length of branching fracture can be obtained by establishing a novel fracture network model. The model can be solved explicitly through the net pressure. This method can reduce the iterations effectively when many natural fracture must be accounted for the realization of numerical calculation. In order to verify the accuracy of the results, the parameters applied in the treatment are adopted as input for simulation, and the data of microseismic mapping are also used for matching the fracture network.

show abstract

Section: Mathematical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation Research and Application of Complex Fracture Network for SRV

Sun¹,

Liu²,

Zheng³

et al. 2019

Proceedings of the 2019 International Conference on Modeling, Analysis, Simulation Technologies and Applications (MASTA 2019)

View full text Add to dashboard Cite

show abstract

“…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. [49][50][51] 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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…Their analysis leads to emergence of a typical length scale with a typical geometry, which agrees with experimental observations. Vo et al [52] use a cohesive fracture model, implementing discrete elements to study desiccation crack formation in clayey soil. The phase field model for fracture follows a different approach, where broken and unbroken materials are considered to be two different phases, with a transition from one to the other over a definite prescribed length scale [53].…”

Section: Simulation Studiesmentioning

confidence: 99%

Formation of desiccation crack patterns in electric fields: a review

Tarafdar

Dutta

2018

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

Desiccation crack formation is an important and interesting part of the broad area of fracture mechanics. Generation of cracks due to drying depends on ambient conditions, which may include externally applied fields. In this review, we discuss the effect of both direct and alternating electrical fields on desiccation crack formation. After a brief introduction to materials which crack on drying, e.g. colloids, clay and ceramics we discuss how they respond to an electric field. Following that, we present an account of experiments and modelling studies performed on granular pastes or clays drying while exposed to an electric field. Specific patterns formed under different geometries, strengths and frequencies of the electric field are described and explained. The review includes work on cracks formed in clay droplets, where a memory effect has been observed and analysed using a generalized calculus formalism. This article is part of the theme issue ‘Statistical physics of fracture and earthquakes’.

show abstract

Numerical modelling of desiccation cracking of clayey soil using a cohesive fracture method

Cited by 78 publications

References 51 publications

Simulation Research and Application of Complex Fracture Network for SRV

Simulation Research and Application of Complex Fracture Network for SRV

Modeling soil desiccation cracking by analytical and numerical approaches

Formation of desiccation crack patterns in electric fields: a review

Contact Info

Product

Resources

About