A State of the Art Review of the Particle Finite Element Method (PFEM)

Cremonesi, Massimiliano; Franci, Alessandro; Idelsohn, Sergio; Oñate, Eugenio

doi:10.1007/s11831-020-09468-4

Cited by 116 publications

(81 citation statements)

References 134 publications

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“…The PFEM is a purely Lagrangian FEM-based method suitable for large deformation analysis in solid and fluid mechanics. The mesh distortion issues arisen from the Lagrangian description of the deforming body, are solved by a special remeshing strategy (Cremonesi et al, 2020). This procedure combines the Delaunay Triangulation algorithm (Edelsbrunner and Tan, 1993) with the Alpha Shape method (Edelsbrunner and Mucke, 1999), a technique employed for the identification of the boundaries of the computational domain.…”

Section: Solution Scheme With the Pfemmentioning

confidence: 99%

3D simulation of Vajont disaster. Part 2: Multi-failure scenarios

Franci

Cremonesi

Perego

et al. 2020

Engineering Geology

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Prediction of multi-hazard events requires an informed and judicious choice of the possible scenarios. An incorrect definition of landslide conditions in terms of expected failure volume, material behavior, or boundary conditions can lead to inaccurate predictions and, in turn, to wrong engineering and risk management decisions. Reduced-scale experiments carried out two years before the Vajont disaster were carried out with a material not representative of the actual rockslide behavior and failed in not considering the simultaneous failure of the whole landslide body. Based on these inappropriate assumptions, the physical models led to wrong estimates of the safety operational level for the Vajont reservoir. This work uses the Particle Finite Element Method (PFEM) to analyze the implications of the wrong hypotheses considered in the pre-event experiments, simulating numerically the Vajont disaster for different sliding volumes and material properties. The use of the PFEM for the accurate assessment of the consequences of landslides impinging in water reservoirs has been already validated in a companion paper. In this work, we demonstrate the capabilities of a robust and reliable numerical modeling approach for the simulation of different scenarios assessing what could have been a safe operational reservoir level in the case of a landslide generated impulse wave. The three-dimensional analyses were run with a high mesh resolution and demonstrate the suitability and robustness of the PFEM model for large-scale landslide and multi-hazard events simulation.

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Section: Solution Scheme With the Pfemmentioning

confidence: 99%

3D simulation of Vajont disaster. Part 2: Multi-failure scenarios

Franci

Cremonesi

Perego

et al. 2020

Engineering Geology

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“…Other particle methods such as MPM [first proposed by Sulsky et al (1994)], PFEM (Cremonesi et al, 2020), or Smoothed-Particle Hydrodynamics(SPH) [first proposed by Gingold and Monaghan (1977), Lucy (1977)] are particularly suitable for the simulation of non-discrete natural events such as debris flows, avalanches, or shallow landslides. For this reason, DEM is chosen to model and simulate the impacting objects (in this case rocks).…”

Section: Dem-fem Couplingmentioning

confidence: 99%

Advanced Modeling and Simulation of Rockfall Attenuator Barriers Via Partitioned DEM-FEM Coupling

Sautter

Hofmann

Wendeler³

et al. 2021

Front. Built Environ.

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Attenuator barriers, in contrast to conventional safety nets, tend to smoothly guide impacting rocks instead of absorbing large amounts of strain energy arresting them. It has been shown that the rock’s rotation plays an important role in the bearing capacity of these systems. Although experimental tests have to be conducted to gain a detailed insight into the behavior of both the structures and the rock itself, these tests are usually costly, time-consuming, and offer limited generalizability to other structure/environment combinations. Thus, in order to support the engineer’s design decision, reinforce test results and confidently predict barrier performance beyond experimental configurations this work describes an appropriate numerical modeling and simulation method of this coupled problem. For this purpose, the Discrete Element Method (DEM) and the Finite Element Method (FEM) are coupled in an open-source multi-physics code. In order to flexibly model rocks of any shape, sphere clusters are used which employ simple and efficient contact algorithms despite arbitrarily complicated shapes. A general summary of the FEM formulation is presented as well as detailed derivations of finite elements particularly pertinent to rockfall simulations. The presented modeling and coupling method is validated against experimental testing conducted by the company Geobrugg. Good agreement is achieved between the simulated and experimental results, demonstrating the successful practical application of the proposed method.

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“…In the Lagrangian approach used in the solid mechanics, the movement of a continuum is determined as a function of materials coordinates and time. The nodes and elements of a Lagrangian mesh move together with a material [14] (Figure 1a). In the case of large deformations, remeshing is quite often necessary.…”

Section: The Coupled Eulerian-lagrangian Approachmentioning

confidence: 99%

The Coupled Eulerian-Lagrangian Analysis of the KOBO Extrusion Process

Wójcik¹,

Skrzat²

2021

Adv. Sci. Technol. Res. J.

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The KOBO extrusion is an unconventional elastic-plastic deformation process in which the phenomenon of changing a path of plastic deformation due to die cyclic oscillations by a given angle and with a given frequency is applied. As the result of the application of the oscillating rotary motion of the die, the reduction of the extrusion force was obtained. The numerical study of the KOBO extrusion of metallic materials was presented in this paper. The three-dimensional coupled Eulerian-Lagrangian (CEL) analysis was applied. The relationship between the extrusion force and the punch displacement during the KOBO process was achieved. The effective plastic strain distribution in the butt was found. The results of the numerical computations were compared with the experimental data. The influence of the material hardening parameters on the cyclic loading phenomena (ratcheting, mean stress relaxation) in terms of the course of the KOBO extrusion was also examined. The proper determination of the material hardening parameters can help to optimize the KOBO process in terms of the reduction the extrusion force and the choice of the amount of die oscillations.

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A State of the Art Review of the Particle Finite Element Method (PFEM)

Cited by 116 publications

References 134 publications

3D simulation of Vajont disaster. Part 2: Multi-failure scenarios

3D simulation of Vajont disaster. Part 2: Multi-failure scenarios

Advanced Modeling and Simulation of Rockfall Attenuator Barriers Via Partitioned DEM-FEM Coupling

The Coupled Eulerian-Lagrangian Analysis of the KOBO Extrusion Process

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