0000000000178953

AUTHOR

Elías Cueto

showing 4 related works from this author

Meshless Simulation of Friction Stir Welding

2007

This paper encompasses our first efforts towards the numerical simulation of friction stir welding by employing a Lagrangian approach. To this end, we have employed a meshless method, namely the Natural Element Method (NEM). Friction Stir welding is a welding process where the union between the work pieces is achieved through the extremely high deformation imposed by a rotating pin, which moves between the two pieces. This extremely high strain is the main responsible of the difficulties associated with the numerical simulation of this forming process. Eulerian and Arbitrary Lagrangian-Eulerian (ALE) frameworks encounter difficulties in some aspects of the simulation. For instance, these ap…

Regularized meshless methodEngineeringALUMINUM EXTRUSIONFriction Stir WeldingBoundary (topology)Mechanical engineering02 engineering and technologyWelding01 natural scienceslaw.inventionsymbols.namesake0203 mechanical engineeringlawFriction stir welding0101 mathematicsSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazionemeshlessComputer simulationbusiness.industryNumerical analysisForming processesEulerian path[SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]Natural Element Method010101 applied mathematics020303 mechanical engineering & transportssymbolsFEM MODELbusinessAIP Conference Proceedings
researchProduct

Numerical Simulation of Friction Stir Welding by Natural Element Methods

2008

In this work we address the problem of numerically simulating the Friction Stir Welding process. Due to the special characteristics of this welding method (i.e., high speed of the rotating pin, very large deformations, etc.) finite element methods (FEM) encounter several difficulties. While Lagrangian simulations suffer from mesh distortion, Eulerian or Arbitrary Lagrangian Eulerian (ALE) ones still have difficulties due to the treatment of convective terms, the treatment of the advancing pin, and many others. Meshless methods somewhat alleviate these problems, allowing for an updated Lagrangian framework in the simulation. Accuracy is not affected by mesh distortion (and hence the name mes…

Regularized meshless method0209 industrial biotechnologyMaterials scienceMechanical engineering010103 numerical & computational mathematicsWelding02 engineering and technology01 natural scienceslaw.invention[SPI.MAT]Engineering Sciences [physics]/Materialssymbols.namesakeFSW Meshless020901 industrial engineering & automation0203 mechanical engineeringlawMeshfree methodsFriction stir weldingGeneral Materials Science0101 mathematicsSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneMaterial point methodComputer simulationbusiness.industryEulerian pathStructural engineering[SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]Finite element method020303 mechanical engineering & transportssymbolsbusiness
researchProduct

A preliminary comparison between finite element and meshless simulations of extrusion

2009

In this paper the extrusion process of a cross-shaped profile was investigated. In particular, the study was focused on the distortion of extruding profiles when the workpiece and die axis are not aligned. The process was simulated using the finite element method (FEM) and the natural element method (NEM), both implemented in an updated-Lagrangian formulation, in order to avoid the burden associated with the description of free surfaces in ALE or Eulerian formulations. Furthermore, an experimental equipment was developed in order to obtain reliable data in terms of deformed entity, required process load and calculated pressure. At the end, a comparison between the numerical predictions and …

Regularized meshless methodMaterials scienceFinite element limit analysisbusiness.industryMetals and AlloysMixed finite element methodStructural engineeringBoundary knot methodIndustrial and Manufacturing EngineeringFinite element methodDiscrete element methodComputer Science Applicationsextrusion modellingModeling and SimulationCeramics and CompositesSmoothed finite element methodmeshless methodbusinessSettore ING-IND/16 - Tecnologie E Sistemi Di LavorazioneExtended finite element methodJournal of Materials Processing Technology
researchProduct

Cross Extrusion With Asymmetric Die: A Comparison Between Finite Element and Meshless Formulation Predictions

2006

[SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph][SPI.MECA] Engineering Sciences [physics]/Mechanics [physics.med-ph]
researchProduct