scholarly journals Development and experimental validation of an arbitrary Lagrangian-Eulerian (ALE) method for soil mechanics

geotechnik ◽  
2015 ◽  
Vol 38 (3) ◽  
pp. 193-204 ◽  
Author(s):  
Daniel Aubram
Keyword(s):  
Experimental Validation ◽  
Soil Mechanics ◽  
Arbitrary Lagrangian Eulerian ◽  
Ale Method

scholarly journals MPM and ALE Simulations of Large Deformations Geotechnics Instability Problems

DYNA ◽  
2020 ◽  
Vol 87 (212) ◽  
pp. 226-235
Author(s):  
Giovanna Monique Alelvan ◽  
Daniela Toro Rojas ◽  
Amanda Cristina Pedron Rossato ◽  
Raydel Lorenzo Reinaldo ◽  
Manoel Porfirio Cordão Neto
Keyword(s):  
Large Deformations ◽  
Material Point Method ◽  
Material Point ◽  
Large Displacements ◽  
Arbitrary Lagrangian Eulerian ◽  
Inclined Plane ◽  
Ale Method ◽  
Advantages And Disadvantages ◽  
Comparison Of The Results ◽  
The Continuum

Problems involving large deformations are the focus of numerical modeling researches in recent decades due to the challenge of finding a kinematic appropriate description of the continuum. In recent years, different formulations have been used to describe such problems as the Arbitrary Lagrangian Eulerian (ALE) method and the Material Point Method (MPM). These two methods allow to perform dynamic analyzes involving large deformations. In this way, this work aims to present a comparison of problems applied to Geotechnics involving large deformations and large displacements, using MPM and FEM associated with the ALE method. For this purpose, three problems are simulated: sliding of blocks on an inclined plane, runout process of sand and instability of a slope using the MPM and the FEM associated with the ALE method. In all cases a comparison of the results is presented, and the advantages and disadvantages of each method are discussed.

A cell-centred arbitrary Lagrangian–Eulerian (ALE) method

2008 ◽  
Vol 56 (8) ◽  
pp. 1161-1166 ◽  
Author(s):  
Pierre-Henri Maire ◽  
Jérôme Breil ◽  
Stéphane Galera
Keyword(s):  
Arbitrary Lagrangian Eulerian ◽  
Ale Method ◽  
A Cell

Steel Plate Behavior under Blast Loading-Numerical Approach Using LS-DYNA

2016 ◽  
Vol 842 ◽  
pp. 200-207 ◽  
Author(s):  
Vu Minh Thanh ◽  
Sigit P. Santosa ◽  
Djarot Widagdo ◽  
Ichsan Setya Putra
Keyword(s):  
Blast Resistance ◽  
Blast Loading ◽  
Numerical Approach ◽  
Coupling Method ◽  
Steel Plates ◽  
Computational Time ◽  
Arbitrary Lagrangian Eulerian ◽  
Ale Method ◽  
Wide Range ◽  
Coupling Algorithm

Plate is one of the most common structural elements, which appears in a wide range of applications: steel bridges, blast-resistance door, and armored vehicles. In this paper, the behavior of steel plates under blast loading was studied through numerical approaches using LS DYNA and then the results were compared with the experiment results obtained from existing literatures. The study of a clamped square plate exposed to blast loading in three distinct stand-off distances. Three different methods of modeling blast loading were used, namely: empirical blast method, arbitrary Lagrangian Eulerian (ALE) method, and coupling of Lagrangian and Eulerian method. The empirical blast method was deployed by using key card *LOAD_BLAST in LS-DYNA. In ALE method, Langrangian and Eulerian solution were combined in the same model and the fluid-structure interaction (FSI) handled by coupling algorithm. In coupling method, the engineering load blast in LS-DYNA (*LOAD_BLAST_ENHANCED) was coupled with the ALE solver. In terms of central deflection and computational time, the coupling method appeared to be the best method which is very time-effective and showed a good correlation with the experiment data.

Comparison of Fluid Structure Interaction Capabilities in Finite Volume and Finite Element Based Codes

2020 ◽  
Author(s):  
Qiyue Lu ◽  
Alfonso Santiago ◽  
Seid Koric ◽  
Paula Cordoba
Keyword(s):  
Finite Element ◽  
Finite Volume ◽  
Fluid Structure Interaction ◽  
Arbitrary Lagrangian Eulerian ◽  
Fluid Structure ◽  
Ale Method ◽  
Structure Interaction ◽  
Commercial Code ◽  
Wide Range ◽  
Volume Method

Abstract Fluid-Structure Interaction (FSI) simulations have applications to a wide range of engineering areas. One popular technique to solve FSI problems is the Arbitrary Lagrangian-Eulerian (ALE) method. Both academic and industry communities developed codes to implement the ALE method. One of them is Alya, a Finite Element Method (FEM) based code developed in Barcelona Supercomputing Center (BSC). By analyzing the application on a simplified artery case and compared to another commercial code, which is Finite Volume Method (FVM) based, this paper discusses the mathematical background of the solver for domains, and carries out verification work on Alya’s FSI capability. The results show that while both codes provide comparable FSI results, Alya has exhibited better robustness due to its Subgrid Scale (SGS) technique for stabilization of convective term and the subsequent numerical treatments. Thus this code opens the door for more extensive use of higher fidelity finite element based FSI methods in future.

A stabilized ALE method for computational fluid–structure interaction analysis of passive morphing in turbomachinery

2019 ◽  
Vol 29 (05) ◽  
pp. 967-994 ◽  
Author(s):  
Alessio Castorrini ◽  
Alessandro Corsini ◽  
Franco Rispoli ◽  
Kenji Takizawa ◽  
Tayfun E. Tezduyar
Keyword(s):  
Fluid Mechanics ◽  
Interaction Analysis ◽  
Fluid Structure Interaction ◽  
Arbitrary Lagrangian Eulerian ◽  
Axial Fan ◽  
Fluid Structure ◽  
Ale Method ◽  
Structure Interaction ◽  
And Performance ◽  
Passive Morphing

Computational fluid–structure interaction (FSI) and flow analysis now have a significant role in design and performance evaluation of turbomachinery systems, such as wind turbines, fans, and turbochargers. With increasing scope and fidelity, computational analysis can help improve the design and performance. For example, it can help add a passive morphing attachment (MA) to the blades of an axial fan for the purpose of controlling the blade load and section stall. We present a stabilized Arbitrary Lagrangian–Eulerian (ALE) method for computational FSI analysis of passive morphing in turbomachinery. The main components of the method are the Streamline-Upwind/Petrov–Galerkin (SUPG) and Pressure-Stabilizing/Petrov–Galerkin (PSPG) stabilizations in the ALE framework, mesh moving with Jacobian-based stiffening, and block-iterative FSI coupling. The turbulent-flow nature of the analysis is handled with a Reynolds-Averaged Navier–Stokes (RANS) model and SUPG/PSPG stabilization, supplemented with the “DRDJ” stabilization. As the structure moves, the fluid mechanics mesh moves with the Jacobian-based stiffening method, which reduces the deformation of the smaller elements placed near the solid surfaces. The FSI coupling between the blocks of the fully-discretized equation system representing the fluid mechanics, structural mechanics, and mesh moving equations is handled with the block-iterative coupling method. We present two-dimensional (2D) and three-dimensional (3D) computational FSI studies for an MA added to an axial-fan blade. The results from the 2D study are used in determining the spanwise length of the MA in the 3D study.

A 3-Dimensional Eulerian Finite Element Model for Ice Scour

2004 ◽  
Author(s):  
Ibrahim Konuk ◽  
Robert Gracie
Keyword(s):  
Finite Element ◽  
Transport Process ◽  
Soil Mechanics ◽  
Element Model ◽  
Fe Model ◽  
Soil Deformation ◽  
Arbitrary Lagrangian Eulerian ◽  
Soil Material ◽  
Soil Transport ◽  
Current Design

The main objective of this paper is to present a Finite Element (FE) numerical model of the ice scour process. The FE model is developed to study the soil deformation and transport process around the scouring ice and to investigate the effects of the ice scour on a pipeline buried or laid in a trench cut on the seabed. The focus of this paper is on the scours caused by ice ridges commonly observed in the Beaufort Sea. The developed FE model is a new application of the Arbitrary-Lagrangian-Eulerian (ALE) method to a soil mechanics problem involving very large deformations. Soil material, originally positioned in front of the ice ridge, is transported forward and sideways through the FE mesh and deposited in the berms formed on both sides of the scour. The soil material below the scour depth similarly moves across the mesh simulating the subscour effect. An inviscid CAP plasticity constitutive model is used to model the soil material. This paper focuses on the interaction between the ice ridge and the seabed. It describes soil transport process involved during the interaction. The soil deformation field obtained from the model is compared with the empirical deformation functions commonly used in current design methods. Future papers will report on the interaction between the ice ridge, the infill in the pipeline trench, and the pipeline; the influence of the soil properties of the trench and the seabed will also be studied.

scholarly journals A cell-centered Arbitrary Lagrangian Eulerian (ALE) method for multi-material compressible flows

2008 ◽  
Vol 24 ◽  
pp. 1-13 ◽  
Author(s):  
P.-H. Maire ◽  
M. De Buhan ◽  
A. Diaz ◽  
C. Dobrzynski ◽  
G. Kluth ◽  
...  
Keyword(s):  
Compressible Flows ◽  
Arbitrary Lagrangian Eulerian ◽  
Ale Method ◽  
A Cell
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