Numerical modelling of a field soil desiccation test using a cohesive fracture model with Voronoi tessellations |
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| Authors: | Y L Gui W Hu Z Y Zhao X Zhu |
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| Institution: | 1.School of Civil Engineering and Geosciences,Newcastle University,Newcastle upon Tyne,United Kingdom;2.State Key Laboratory of Geohazard Prevention and Geoenvironmental Protection,Chengdu University of Technology,Chengdu,China;3.School of Civil and Environmental Engineering,Nanyang Technological University,Singapore,Singapore |
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| Abstract: | Numerical modelling of a field soil desiccation test is performed using a hybrid continuum-discrete element method with a mix-mode cohesive fracture model and Voronoi tessellation grain assemblages. The fracture model considers material strength and contact stiffness degradation in both normal and tangential directions of an interface. It is found that the model can reasonably reproduce the special features of the field soil desiccation, such as curling and sub-horizontal crack. In addition, three significant factors controlling field desiccation cracking, fracture energy, grain heterogeneity and grain size are identified. |
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