Fluid Coupled-DEM Simulation of Lateral Loading Experiment for Buried Pipe in Saturated Sand

Ono, Kohei; Terada, Kenji; Sawada, Yutaka; Ling, Hoe I.; Kawabata, Toshinori

doi:10.1007/s40515-018-0050-5

Cited by 6 publications

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several numerical techniques have been proposed in the literature to model such fluid-solid interaction, and the combination of the discrete element method (DEM) with the fluid module stands out for its exceptional ability to reveal the prevailing microscopic mechanisms. According to the mathematical principle of the constituent fluid module, the DEM-based coupling themes are mainly composed of CFD-DEM, [5][6][7][8][9][10] fluid-DEM, [11][12][13][14][15] LBM-DEM, [16][17][18][19][20][21] PNM-DEM, [22][23][24][25][26][27] SPH-DEM, [28][29][30][31][32][33] and so on. Owing to the comparative advantages of being sufficiently intuitive and accurate, the CFD-DEM coupling method based on the locally averaged Navier-Stokes equations frequently performs as an effective approach for the imitation of micro-scale fluid-solid interactions.…”

Section: Introductionmentioning

confidence: 99%

A novel unresolved/semi‐resolved CFD‐DEM coupling method with dynamic unstructured mesh

He,

Li,

Chen

2024

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

The greatest challenge when performing large deformation simulations using the CFD‐DEM coupling method lies in the dynamical update of the fluid meshes. To address this problem, a novel CFD‐DEM coupling method integrated with the dynamic unstructured grid is proposed in this work. The mesh initialization and reconstruction are performed by the Constrained Delaunay triangulation (CDT) implemented by the tetgen algorithm. Moreover, the equation of state (EOS) is introduced to consider the impact of fluid compressibility. The reliability of this coupling method is preliminarily verified by the particle sedimentation test. Additionally, undrained triaxial shear and one‐dimensional consolidation tests are conducted to examine the applicability of the proposed method in simulating geotechnical cases. From our analysis, it is found that the shear responses in the undrained triaxial shear test obtained from the proposed method with dynamic mesh are in direct accordance with those led by the constant volume (CV) method. However, difficulties arise in accurately describing the moving boundary by the fixed mesh, leading to unreliable results. Moreover, in the one‐dimensional consolidation test, both the dynamic and fixed grids can capture the Mandel—Cryer effect, which is more pronounced under the dynamic grid, mainly due to the dual impact of the loading device and particle skeleton on the fluid. A greater compressibility specified under the dynamic grid led to a weakening of this effect, whereas its duration is increased. Our work provides valuable insights for effectively dealing with dynamic fluid boundaries.

show abstract

Section: Introductionmentioning

confidence: 99%

A novel unresolved/semi‐resolved CFD‐DEM coupling method with dynamic unstructured mesh

He,

Li,

Chen

2024

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

“…Usually, the thickness of the plate ranges between 1.50 to 12.50 mm [1][2][3][4]. Flat steel sheets [3] or plastic pipes [5][6][7][8][9] are used less frequently. Today, such structures are being widely used in road, railway, tunneling, and animal overpasses as an alternative to conventional bridges, for example, reinforced concrete (RC) slab bridges [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Behaviour of soil-steel composite structures during construction and service: a review

2023

Archives of Civil Engineering

View full text Add to dashboard Cite

In this paper, existing knowledge on the behaviour of soil-steel composite structures (SSCSs) has been reviewed. In particular, the response of buried corrugated steel plates (CSPs) to static, semistatic, and dynamic loads has been covered. Furthermore, the performance of SSCS under extreme loading, i.e., loading until failure, has been studied. To investigate the behaviour of the type of composite structures considered, numerous full-scale tests and numerical simulations have been conducted for both arched and box shapes of the shell. In addition, researchers have examined different span lengths and cover depths. Furthermore, to enhance the load-bearing capacity of the composite structures, various stiffening elements have been applied and tested. The review shows that the mechanical features of SSCSs are mainly based on the interaction of the shell with the soil backfill. The structures, as a composite system, become appropriately stiff when completely backfilled. For this reason, the construction phase corresponds to the highest values of shell displacement and stress. Moreover, the method of laying and compacting the backfill, as well as the thickness of the cover, has a significant impact on the behaviour of the structure at the stage of operation in both the quantitative and qualitative sense. Finally, a limited number of studies are conducted on the ultimate bearing capacity of large-span SSCS and various reinforcing methods. Considerably more works will need to be done on this topic. It applies to both full scale tests and numerical analysis.

show abstract

“…Liu and Wang introduce the nonlinear pipe-soil interaction model into the analysis of lateral global bending of pipelines and investigate the bending characteristics of submarine pipelines with single-arch symmetric initial imperfections under different pipe-soil interaction models [17]. Ono et al use fluid-coupled DEM (Discrete Element Method) to perform two-dimensional simulations of lateral loading experiments of pipes buried in saturated sand [18]. Weerasinghe et al carry out an analysis of the moisturecontrolled expansion/contraction behaviour of unsaturated soils based on finite element analysis software as an application of pipe stress analysis to quantify the stresses generated 2 Geofluids by reactive soil movements on pipes [19].…”

Section: Introductionmentioning

confidence: 99%

Coupling Interaction of Surrounding Soil-Buried Pipeline and Additional Stress in Subsidence Soil

Ding

Yang

et al. 2021

Geofluids

View full text Add to dashboard Cite

In the process of underground resource exploitation, the induced surface subsidence easily leads to the deformation and failure of buried pipeline. And in the process of soil subsidence, the complex interaction between buried pipeline and surrounding soil occurs, which leads to deformation and additional stress in buried pipeline. In this paper, a laboratory test system is designed and developed to analyze the influence of buried depth, cohesion of soil, and angle of internal friction on stress, in order to obtain the deformation mechanism of pipe-soil and the pressure around the pipe and the distribution of additional axial stress along the pipeline. The research results show that in the process of subsidence, the synergistic deformation between the pipe and soil at both ends of the subsidence area is maintained, while there is a compressive nonsynergistic deformation zone in the soil at the top of the pipe, and the deformation zone in the cohesion-less soil and the cohesive soil presents a spire shape and an arch shape, respectively. Areas of maximum additional tensile and compressive stresses occur in the area of maximum curvature and the central position. In addition, the smaller the burial depth, the earlier the unloading phenomenon occurs; and the additional stress in buried pipe in cohesion-less soil is significantly less than that in cohesive soil, and the unloading phenomenon occurs earlier. The research results provide the basis for disaster prevention of buried petroleum transmission pipeline in subsidence process.

show abstract

Fluid Coupled-DEM Simulation of Lateral Loading Experiment for Buried Pipe in Saturated Sand

Cited by 6 publications

References 19 publications

A novel unresolved/semi‐resolved CFD‐DEM coupling method with dynamic unstructured mesh

A novel unresolved/semi‐resolved CFD‐DEM coupling method with dynamic unstructured mesh

Behaviour of soil-steel composite structures during construction and service: a review

Coupling Interaction of Surrounding Soil-Buried Pipeline and Additional Stress in Subsidence Soil

Contact Info

Product

Resources

About