Modeling of Ground Excavation with the Particle Finite-Element Method

Carbonell, Josep Maria; Oñate, Eugenio; Suárez, Benjamín

doi:10.1061/(asce)em.1943-7889.0000086

Cited by 113 publications

(90 citation statements)

References 10 publications

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“…Although PFEM was initially applied to problems in the field of fluid mechanics, it is being currently applied to a wide range of simulation problems [14][15][16], [17]: filling, erosion, mixing processes, thermo-viscous processes and thermal diffusion problems, among others. First applications of PFEM to solid mechanics are found in [18] to problems involving large strains and rotations, multi-body contacts and creation of new surfaces (riveting, powder filling and machining).…”

Section: The Particle Finite Element Methodsmentioning

confidence: 99%

PFEM-based modeling of industrial granular flows

et al. 2014

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The potential of numerical methods for the solution and optimization of industrial granular flows problems is widely accepted by the industries of this field, the challenge being to promote effectively their industrial practice. In this paper, we attempt to make an exploratory step in this regard by using a numerical model based on continuous mechanics and on the so-called Particle Finite Element Method (PFEM). This goal is achieved by focusing two specific industrial applications in mining industry and pellet manufacturing: silo discharge and calculation of power draw in tumbling mills. Both examples are representative of variations on the granular material mechanical response -varying from a stagnant configuration to a flow condition. The silo discharge is validated using the experimental data, collected on a full-scale flat bottomed cylindrical silo. The simulation is conducted with the aim of characterizing and understanding the correlation between flow patterns and pressures for concentric discharges. In the second example, the potential of PFEM as a numerical tool to track the positions of the particles inside the drum is analyzed. Pressures and wall pressures distribution are also studied. The power draw is also computed and validated against experiments in which the power is plotted in terms of the rotational speed of the drum.

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Section: The Particle Finite Element Methodsmentioning

confidence: 99%

PFEM-based modeling of industrial granular flows

et al. 2014

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“…Clearly, other interpolation strategies are possible, see for instance [25]. Extended details about remeshing and interpolation in PFEM applications for solid mechanics can be found in [28,9].…”

Section: Fundamentals Of Pfem For Soil Mechanicsmentioning

confidence: 99%

“…Later it was extended to deformable single-phase solids [19]. Subsequently, several PFEM extensions have addressed geomaterials: Carbonell et al [10] used PFEM to simulate ground excavation problems. Flow-like landslides have been also studied using PFEM, but considering a singlephase material description.…”

Section: Introductionmentioning

confidence: 99%

Performance of mixed formulations for the particle finite element method in soil mechanics problems

et al. 2016

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This paper presents a computational framework for the numerical analysis of fluid-saturated porous media at large strains. The proposal relies, on one hand, on the Particle Finite Element Method (PFEM), known for its capability to tackle large deformations and rapid changing boundaries, and, on the other hand, on constitutive descriptions well-established in current geotechnical analyses (Darcy's law; Modified Cam Clay; Houlsby hyper-elasticity). An important feature of this kind of problem is that incompressibility may arise either from undrained conditions or as a consequence of material behavior; incompressibility may lead to volumetric locking of the low-order elements that are typically used in PFEM. In this work, two different three-field mixed formulations for the coupled hydro-mechanical problem are presented, in which either the effective pressure or the Jacobian are considered as nodal variables, in addition to the solid skeleton displacement and water pressure. Additionally, several mixed formulations are described for the simplified single-phase problem due to its formal similitude to the poromechanical case and its relevance in geotechnics, since it may approximate the saturated soil behavior under undrained conditions. In order to use equal order interpolants in displacements and scalar fields, stabilization techniques are used in the mass conservation equation of the biphasic medium and in the rest of scalar equations. Finally, all mixed formulations are assessed in some benchmark problems and their performances are compared. It is found that mixed formulations that have the Jacobian as a nodal variable perform better.

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“…In Sect. 5 we present an overview of the thermo-elastoplastic models at finite strains and its stress-update algorithm.…”

Section: Contentsmentioning

confidence: 99%

Generation of segmental chips in metal cutting modeled with the PFEM

et al. 2017

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The Particle Finite Element Method, a lagrangian finite element method based on a continuous Delaunay retriangulation of the domain, is used to study machining of Ti6Al4V. In this work the method is revised and applied to study the influence of the cutting speed on the cutting force and the chip formation process. A parametric methodology for the detection and treatment of the rigid tool contact is presented. The adaptive insertion and removal of particles are developed and employed in order to sidestep the difficulties associated with mesh distortion, shear localization as well as for resolving the fine-scale features of the solution. The performance of PFEM is studied with a set of different two-dimensional orthogonal cutting tests. It is shown that, despite its Lagrangian nature, the proposed combined finite element-particle method is well suited for large deformation metal cutting problems with continuous chip and serrated chip formation.B J. M. Carbonell

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Modeling of Ground Excavation with the Particle Finite-Element Method

Cited by 113 publications

References 10 publications

PFEM-based modeling of industrial granular flows

PFEM-based modeling of industrial granular flows

Performance of mixed formulations for the particle finite element method in soil mechanics problems

Generation of segmental chips in metal cutting modeled with the PFEM

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