A 3D particle finite element model for the simulation of soft soil excavation using hypoplasticity

Bal, Abdiel Ramon Leon; Dang, Thai Son; Meschke, Günther

doi:10.1007/s40571-019-00271-y

Cited by 10 publications

(5 citation statements)

References 53 publications

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“…In case of insertion of new particles, solution variables are linearly mapped onto the new particles. Even though, PFEM was developed as a particle method in the field of fluid dynamics and soon found application in problems involving solid mechanics [12,13,[16][17][18][19]. Therefore, in addition to the solution variables, also internal variables located on the Gauss points need to be mapped to the new discretization, due to changes of nodal connectivities after the re-meshing procedure.…”

Section: The Smoothed Particle Finite Element Methodsmentioning

confidence: 99%

“…Beside in fluid dynamics problems, PFEM also found application in geotechnical applications, e.g. for the simulations of landslides [12][13][14][15] and excavation processes [16,17] and for solving problems in manufacturing, such as metal forming [18,19] and metal cutting processes [20]. Typically low order triangular and tetrahedral elements are used in PFEM algorithms in order to guarantee a fast and robust re-meshing of the domain.…”

Section: Introductionmentioning

confidence: 99%

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A mixed u–p edge-based smoothed particle finite element formulation for viscous flow simulations

Reinold

Meschke

2021

Comput Mech

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A mixed u–p edge-based smoothed particle finite element formulation is proposed for computational simulations of viscous flow. In order to improve the accuracy of the standard particle finite element method, edge-based and face-based smoothing operations on the displacement gradient are proposed for 2D and 3D analyses, respectively. Consequently, spatial integration involving the smoothing operator is performed on smoothing domains. The constitutive model is based on an elasto-viscoplastic formulation allowing for simulations of viscous fluid or fluid-like solid materials. The viscous response is modeled using an overstress function. The performance of the proposed edge-based smoothed particle finite element method (ES-PFEM) is demonstrated by several numerical benchmark studies, showing an excellent agreement with analytical and reference solutions and an improved accuracy and computational efficiency in comparison with results from the standard PFEM model. Finally, a numerical application of the ES-PFEM to the computational simulation of the extrusion process during 3D-concrete-printing is discussed.

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Section: The Smoothed Particle Finite Element Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A mixed u–p edge-based smoothed particle finite element formulation for viscous flow simulations

Reinold

Meschke

2021

Comput Mech

Self Cite

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“…PFEM has proven its robustness in many different applications in fluid dynamics, for example fluid structure interaction problems [36,38], Bingham fluid problems [39,40] or multi-phase flow [41]. The reliability of PFEM was also demonstrated in applications involving solid mechanics, such as soil excavation [42], industrial forming processes [43,44] or flow of granular material [45,46].…”

Section: The Particle Finite Element Methodsmentioning

confidence: 99%

Extrusion Process Simulation and Layer Shape Prediction during 3D-Concrete-Printing Using The Particle Finite Element Method

Reinold¹,

Nerella²,

Mechtcherine³

et al. 2020

Preprint

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To enable purposeful design and implementation of automated concrete technologies, precise assessment and prediction of the complex material flow at various stages of the process chain are necessary. This paper investigates the intermediate stage of the extrusion and deposition processes in extrusion-based 3D-concrete-printing, using a numerical model based on the Particle Finite Element Method (PFEM). In PFEM, due to the Lagrangian description of motion, remeshing algorithms and the alpha shape method are used to track the free surface during large deformation scenarios. The Bingham constitutive model was used for describing the rheological behaviour of fresh concrete. This model is validated by comparing the numerically predicted layer geometries with those obtained from laboratory 3D printing experiments. Extensive parametric studies were then conducted using the numerical simulation, delineating the influence of process and material parameters on the layer geometries, the dynamic surface forces generated under the extrusion nozzle and the inter-layer interactions.

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“…Harahap et al [15] used two-dimensional finite element software to study the variation characteristics of diaphragm walls and surfaces with time during soft soil deep foundation pit excavation. Bal et al [16] proposed a numerical model for analyzing soft soil excavation using single excavation tools and multiple excavation tools that can simulate tool-soil interaction in the process of excavation. Uribe-Henao et al [17] used a new finite element model to study the interaction between the support structure and soil of soft clay deep foundation pits and revealed the mechanism of the support structure on the soil.…”

Section: Introductionmentioning

confidence: 99%

Monitoring Analysis of a Deep Foundation Pit with Water Supported by Cast-in-Place Pile and Internal Bracing in a Soft Soil Area of Fuzhou

Tu,

Zheng,

Shen

et al. 2023

Water

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In addition to selecting an effective support structure to control deformation, precipitation and water stopping should also be considered when designing a support scheme for water-bearing foundation pits in soft soil areas. This paper presents a detailed description of the foundation pit support scheme, the precipitation and water-stopping scheme, and the monitoring scheme of the foundation pit project of Taijiang Square in Fuzhou. During the construction of the foundation pit, the monitoring data of 12 items such as the deep horizontal displacement of the enclosure pile, the horizontal displacement at the top of the foundation pit, the settlement at the top of the foundation pit, the axial force of the internal bracing, and the axial force of the enclosure pile were obtained through 12 months of monitoring. The analysis of the monitoring data for each item led to the following two main findings. The first finding is that, during the construction of the pit, the monitoring values of the 12 monitoring items did not exceed the alarm values, which proves that the support scheme of the cast-in-place pile enclosure structure and internal bracing can meet the design requirements of deep foundation pits in soft soil areas. The second finding is that tube-well dewatering is an effective way to lower the groundwater level in water-containing deep foundation pits in soft soil areas, and double-wheel deep-mixing water-stopping curtain walls can effectively control the infiltration of groundwater outside the water-containing deep foundation pits in soft soil areas. This foundation pit project is representative, and it provides a good reference case for the design of water-bearing deep foundation pit projects in soft soil areas.

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A 3D particle finite element model for the simulation of soft soil excavation using hypoplasticity

Cited by 10 publications

References 53 publications

A mixed u–p edge-based smoothed particle finite element formulation for viscous flow simulations

A mixed u–p edge-based smoothed particle finite element formulation for viscous flow simulations

Extrusion Process Simulation and Layer Shape Prediction during 3D-Concrete-Printing Using The Particle Finite Element Method

Monitoring Analysis of a Deep Foundation Pit with Water Supported by Cast-in-Place Pile and Internal Bracing in a Soft Soil Area of Fuzhou

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