Mud Shrinkage and Cracking Phenomenon Experimental Identification Using Digital Image Correlation

Hattab, Mahdia; Taïbi, Saïd; Fleureau, Jean‐Marie

doi:10.1007/978-3-030-53755-5_19

Cited by 2 publications

(2 citation statements)

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“…The occurrence of soil desiccation cracking has a significant effect on structure safety as it causes crucial implication in the performance of soil such as leakage of nuclides in compacted bentonite [3][4][5][6], landslides and mudslides in clayey soil [7,8]. Understanding the phenomena is also of significant importance in the field of eco-geo construction such as raw earth building [9] which, despite being a prominent new technique, it faces the risk of desiccation cracking because of severe exposure to dry conditions, [10] especially during preparation of the material. Therefore, it becomes more important to study the behavior of clayey soil, and in particular the propagation of tensile cracks in earth structures.…”

Section: Introductionmentioning

confidence: 99%

“…Typically, most of the published works concerned the laboratory and in situ observation of cracks formed by desiccation [3,[14][15][16]. Due to the limitation of the experimental approaches, various authors added the image processing technique to the experimental work for a better characterization of cracking pattern [10,[17][18][19] for a quick measurement of soil shrinkage characteristic curve. However, these authors focused mainly on factors influencing the process (drying conditions, specimen properties, boundary conditions etc.)…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study of Desiccation Cracking In Clayey Soil: A New FEM-MPM Coupling Method.

Jihen

Salma

Trabelsi

et al. 2021

Preprint

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Desiccation cracking is a critical phenomenon soliciting the soil hydro-mechanical behavior, and significantly affects the performance of soil in geotechnical engineering. For this reason, an increasing interest toward studying and simulating the soil crack propagation, after a severe exposure to dry conditions (induced by desiccation), has been noticed during the recent years. However, major gaps remain in the previously developed models to properly provide a realistic prediction of the cracks pattern scheme especially when using the classical Finite Element Method (FEM), widely used in the geotechnical application. In this study, owing to the limitation of this method in re-meshing and dealing with large deformation, the authors were prompted to couple FEM with a mesh-free method: The Material Point Method (MPM) to overcome the individual drawbacks of each method. The dominant influencing factors on soil desiccation cracking have been assessed through a desiccation test performed in climatic chamber and using a digital image processing technique (image analysis) for a quantitative description of the studied sample. A model that relates porosity with suction and tensile strength was used to study the effect of the shrinkage phenomena in desiccation term, and to simulate the crack propagation in a thin clayey soil layer using the Code_Bright software. Consequently, a clear and connected crack pattern was observed, the problem of mesh dependency was clearly overcome proving the validity of the approach and providing a further insight into the behavior of clayey soil exposed to desiccation factors.

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