A 2D discrete moisture diffusion model for simulating desiccation fracturing of soil

Yan, Chengzeng; Luo, Zhiqiang; Zheng, Yucheng; Ke, Wenhui

doi:10.1016/j.enganabound.2022.02.006

Cited by 34 publications

(2 citation statements)

References 46 publications

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“…In the past, several approaches have been presented for dealing with this problem, with models available for each phase. There are numerical approaches in the literature based on the finite element method (FEM), the discrete element method (DEM), the distinct element method (DiEM), the mesh fragmentation technique (MFT), the lattice spring model (DLSM) [2,11,[25][26][27][28][29][30][31], etc.…”

Section: Introductionmentioning

confidence: 99%

Numerical Solution of Desiccation Cracks in Clayey Soils

Levatti

2022

Encyclopedia

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This entry presents the theoretical fundamentals, the mathematical formulation, and the numerical solution for the problem of desiccation cracks in clayey soils. The formulation uses two stress state variables (total stress and suction) and results in a non-symmetric and nonlinear system of transient partial differential equations. A release node algorithm technique is proposed to simulate cracking, and the strategy to implement it in the hydromechanical framework is explained in detail. This general framework was validated with experimental results, and several numerical examples were published at international conferences and in journal papers.

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Section: Introductionmentioning

confidence: 99%

Numerical Solution of Desiccation Cracks in Clayey Soils

Levatti

2022

Encyclopedia

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“…Later, Yan [20] proposed a new potential function, which not only retained all the characteristics of the original potential function in the FDEM but also reduced the dependence on the mesh. Yan developed a series of 2D/3D hydro-mechanical coupling models [21][22][23][24][25][26][27][28], contact heat transfer models [29][30][31], thermo-mechanical coupling models [32][33][34][35][36], hydrothermal coupling models [37], and moisture diffusion-fracture coupling models [38][39][40], which make it possible to solve complex problems such as hydraulic fracturing, thermal cracking, shrinkage cracking, etc. Later, these models were integrated and combined with GPU parallel technology to develop the MultiFracS software by Yan [36].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Rock Damage Mechanism Induced by Blasting Excavation Using Finite Discrete Element Method

Wang

Yan

et al. 2022

Applied Sciences

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In this paper, the mechanism of rock damage induced by blasting excavation is numerically studied by using an FDEM-based multiphysics fracture analysis software, MultiFracS. Based on the drainage channel project of Guanggu 1st Road to Gaoxin 4th Road, a numerical model considering the near-field fracture process is established to study the influence of a millisecond delay and construction technology on the blasting excavation. Firstly, the double side drift method model is established to analyze the influence of different millisecond delays on the peak blasting vibration velocity. Then, the rock fracture process of the surrounding rock around the blast holes under the blasting excavation construction technology of the double side drift method, the reserved core soil method, and the CRD method is studied, respectively. The numerical simulation results show that the mainshock phases of the blasting vibration velocity waveform generated by different bores overlap when the millisecond delay is small. With the increase in the millisecond delay, the mainshock phase is gradually separated, and the superposition effect of the blasting vibration is weakened. When the millisecond delay is greater than 40 ms, the peak blasting vibration velocity is not affected by the millisecond delay. In the three kinds of blasting excavation construction technologies, the double side drift method has a better effect on the deformation and the fracture control of the surrounding rock. The optimal millisecond delay and the rock fracture evolution process of the surrounding rock around blast holes with different blasting excavation construction technologies are obtained.

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