A systematic 3D simulation method for geomaterials with block inclusions from image recognition to fracturing modelling

Lin, Yuexiang; Yin, Zhen‐Yu; Wang, Xiang; Huang, Linchong

doi:10.1016/j.tafmec.2021.103194

Cited by 30 publications

(17 citation statements)

References 62 publications

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“…Soil and rock mixture is a complicated and problematic geomaterial, which has distinguishable physical and mechanical properties from those of pure rocks and soils. The mixtures are widely distributed in nature and bring a lot of difficulties to project constructions due to their complicated inner structures and mechanical properties [1][2][3]. Previous research validates that the mechanical properties of soil and rock mixtures are affected by multiple factors such as rock block proportions, rock block shapes, rock size distributions, etc.…”

Section: Introductionmentioning

confidence: 76%

“…In contrast, Nie et al, [10] developed a stochastic algorithm to model irregular rock blocks by combining circular function and Fourier functions. Some other researchers used digital image processing technology to obtain block profiles directly [1,11]. Even though a solid foundation has been laid by current research results [11][12][13], there are two urgent problems to be solved.…”

Section: Introductionmentioning

confidence: 99%

“…Even though a solid foundation has been laid by current research results [11][12][13], there are two urgent problems to be solved. First, simple mathematical functions and regular polygons cannot well represent the profiles of realistic rock blocks [1,13]. Second, it is hard to conduct systematic parameter analysis through digital image processing [11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Novel Modeling Approach for Soil and Rock Mixture and Applications in Tunnel Engineering

Zhang

et al. 2023

Sustainability

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Soil and rock mixtures are complicated geomaterials that are characterized by both continuity and discontinuity. A homogeneous model cannot take into consideration the interactions between rocks and soil, which could lead to misjudgments of the mechanical properties. To simulate the mechanical responses of soil and rock mixtures accurately, a stochastic generation approach to soil and rock mixtures was developed systematically in this study. The proposed approach includes the following three major steps: (1) a combined image filtering technique and multi-threshold binarization method were developed to extract rock block files from raw images. (2) The shapes and sizes of block profiles were controlled and reconstructed randomly using Fourier analysis. (3) A fast-overlapping detection strategy was proposed to allocate the rock blocks efficiently. Finally, models of soil and rock mixtures with a specific rock proportion can be generated. To validate the proposed approach, numerical models were established in tunnel engineering using the conventional homogeneous method and the proposed numerical method, respectively. In addition, a series of field tests on tunnel deformation and stress were conducted. The results showed that the proposed heterogeneous numerical model can model the mechanical response of the soil and rock mixtures well and is much more effective and accurate than the conventional homogeneous approach. Using the proposed numerical approach, the failure mechanism of a tunnel in a soil and rock mixture is discussed, and a reinforcement strategy for the surrounding rocks is proposed. The field tests results indicate that tunnel lining stress can be well controlled within the strength criterion by the proposed reinforcement strategy.

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Section: Introductionmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Novel Modeling Approach for Soil and Rock Mixture and Applications in Tunnel Engineering

Zhang

et al. 2023

Sustainability

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“…The direction and intensity of the wind always fluctuate with time, which makes it difficult to simulate the force of each component of the wind turbine. The change of the wind angle from 30 degrees to 40 degrees will cause the thrust of the wind turbine to change by 27% [1][2][3], and the wind is also different at different heights [4][5][6][7]. As a complex structure, the wind turbine structure is easily damaged during the working process.…”

Section: Introductionmentioning

confidence: 99%

Study on Dynamic Response Characteristics of Circular Extended Foundation of Large Wind Turbine Generator

et al. 2022

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In order to study the dynamic response characteristics of circular extended foundation of wind turbine in mountainous areas, a 1:10 scaled model test was carried out on the circular extended foundation of 2MW wind turbine, and the deformation characteristics of wind turbine foundation under random wind load were analyzed by ABAQUS numerical calculation. The results show that: (1) The wind turbine foundation has different stress types on the windward side and the leeward side. The components of the windward side foundation are subjected to tensile stress, while the components of the wind turbine leeward side foundation are subjected to compressive stress. (2) The strain of the foundation bolt, the strain of the foundation ring, and the strain of the foundation plate are within the allowable range of material deformation, but the relative deformation of the windward side and the leeward side is quite different. (3) The numerical calculation results of wind turbine foundation under strong wind load are compared with the failure results of scale model experiment, which shows that the overall overturning failure of foundation is a dynamic response mode of wind turbine foundation. In the design and construction, it is necessary to strengthen the research on the windward side and the leeward side and strengthen the anti-overturning design of the wind turbine expansion foundation.

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“…It is evident that soil materials are significantly different from rock materials in physical and mechanical properties. The soil-rock mixture (SRM) is mainly composed of soft soil material and rock material with higher stiffness and is widely distributed in Southwest China [1,2]. In particular, a lot of SRM slopes exist in the hydropower station reservoir area, dam site, and other key parts of the significant projects [3].…”

Section: Introductionmentioning

confidence: 99%

Study on Failure Mechanism of Soil–Rock Slope with FDM-DEM Method

Zheng

Zhan³

et al. 2022

Sustainability

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A discrete-continuous coupling analysis method based on FLAC2D/PFC2D is established with the help of the program’s own FISH language and Socket O/I data transfer interface. According to the statistical characteristics of the mesostructure of the slope site, the computer stochastic simulation method is used to construct the mesostructure model of the soil–rock mixture in the discrete domain. The deformation and failure mechanism of the SRM slope is studied by using the established discrete-continuous coupled analysis method. The results show that the statistical distribution of the mesoscopic contact characteristics (such as contact direction and contact force) between soil and rock particles inside the slope changes and adjusts significantly. Among them, the main direction of the statistical distribution is adjusted most significantly, and the main direction is finally adjusted to being basically the same as the sliding direction of the slope. The change in the mesoscopic contact characteristics between soil and rock particles is the internal driving factor for the macroscopic deformation of the slope and the adjustment of the stress state.

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A systematic 3D simulation method for geomaterials with block inclusions from image recognition to fracturing modelling

Cited by 30 publications

References 62 publications

A Novel Modeling Approach for Soil and Rock Mixture and Applications in Tunnel Engineering

A Novel Modeling Approach for Soil and Rock Mixture and Applications in Tunnel Engineering

Study on Dynamic Response Characteristics of Circular Extended Foundation of Large Wind Turbine Generator

Study on Failure Mechanism of Soil–Rock Slope with FDM-DEM Method

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