Ara es mostren els items 1-20 de 54

  • 3D numerical modelling of twisting cracks under bending and torsion of skew notched beams 

    Benedetti, Lorenzo; Cervera Ruiz, Miguel; Chiumenti, Michèle (2017-05)
    Article
    Accés restringit per política de l'editorial
    The testing of mode III and mixed mode failure is every so often encountered in the dedicated literature of mechanical characterization of brittle and quasi-brittle materials. In this work, the application of the mixed ...
  • 3D numerical models of FSW processes with non-cylindrical pin 

    Bussetta, Philippe; Dialamishabankareh, Narges; Chiumenti, Michèle; Agelet de Saracibar Bosch, Carlos; Cervera Ruiz, Miguel; Ponthot, Jean Philippe (Taylor & Francis, 2015-06)
    Article
    Accés obert
    Friction Stir Welding (FSW) process is a relatively recent welding process (patented in 1991). FSW is a solid-state joining process during which materials to be joined are not melted. During the FSW process, the behaviour ...
  • 3D numerical models using a fluid or a solid formulation of FSW processes with a non-cylindrical pin 

    Bussetta, Philippe; Dialamishabankareh, Narges; Chiumenti, Michèle; Agelet de Saracibar Bosch, Carlos; Cervera Ruiz, Miguel; Boman, Romain; Ponthot, Jean Philippe (Springer, 2015-12)
    Article
    Accés obert
    Friction Stir Welding (FSW) process is a relatively recent welding process (patented in 1991). FSW is a solid-state joining process during which materials to be joined are not melted. During the FSW process, the behaviour ...
  • A computational model for the numerical simulation of FSW processes 

    Agelet de Saracibar Bosch, Carlos; Chiumenti, Michèle; Santiago, Diego; Cervera Ruiz, Miguel; Dialami, Narges; Lombera, Guillermo (Springer, 2010)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper a computational model for the numerical simulation of Friction Stir Welding (FSW) processes is presented. FSW is a new method of welding in solid state in which a shouldered tool with a profile probe is rotated ...
  • Advances in the numerical simulation of 3D FSW processes 

    Agelet de Saracibar Bosch, Carlos; Chiumenti, Michèle; Cervera Ruiz, Miguel; Dialami, Narges; Santiago, Diego; Lombera, Guillermo (2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This work deals with the computational modeling and numerical simulation of 3D Friction Stir Welding (FSW) processes. Eulerian and ALE formulations have been used to solve the quasi-static thermal transient governing ...
  • A fast and accurate two-stage strategy to evaluate the effect of the pin tool profile on metal flow, torque and forces in friction stir welding 

    Dialami, Narges; Cervera Ruiz, Miguel; Chiumenti, Michèle; Agelet de Saracibar Bosch, Carlos (2017-03-01)
    Article
    Accés restringit per política de l'editorial
    Pin geometry is a fundamental consideration in friction stir welding (FSW). It influences the thermal behaviour, material flow and forces during the weld and reflects on the joint quality. This work studies four pin ...
  • A localized mapped damage model for orthotropic materials 

    Pelà, Luca; Cervera Ruiz, Miguel; Oller Martínez, Sergio Horacio; Chiumenti, Michèle (2014-05-08)
    Article
    Accés restringit per política de l'editorial
    This paper presents an implicit orthotropic model based on the Continuum Damage Mechanics isotropic models. A mapping relationship is established between the behaviour of the anisotropic material and that of an isotropic ...
  • A mixed stabilized finite element formulation for strain localization analysis 

    Chiumenti, Michèle; Cervera Ruiz, Miguel; Agelet de Saracibar Bosch, Carlos (2010)
    Text en actes de congrés
    Accés obert
    This work exploits the concept of stabilization techniques to improve the behaviour of either mixed or pu/mixed u/εlinear/linear triangular elements when strain localization analysis is required. Different stabilization ...
  • A mixed three-field FE formulation for stress accurate analysis including the incompressible limit 

    Chiumenti, Michèle; Cervera Ruiz, Miguel; Codina, Ramon (2015-01)
    Article
    Accés obert
    In previous works, the authors have presented the stabilized mixed displacement/pressure formulation to deal with the incompressibility constraint. More recently, the authors have derived stable mixed stress/displacement ...
  • Analysis of the effect of provisional ties on the construction and current deformation of Mallorca cathedral 

    Pelà, Luca; Bourgeois, Julien; Roca Fabregat, Pedro; Cervera Ruiz, Miguel; Chiumenti, Michèle (2016-04)
    Article
    Accés restringit per política de l'editorial
    This paper presents the analysis of the structure of Mallorca Cathedral taking into account the influence on structural behaviour of auxiliary iron ties used during the construction process. Recent studies (Roca et al., ...
  • A novel stress-accurate FE technology for highly non-linear analysis with incompressibility constraint: application to the numerical simulation of the FSW process 

    Chiumenti, Michèle; Cervera Ruiz, Miguel; Agelet de Saracibar Bosch, Carlos; Dialami, Narges (American Institute of Physics (AIP), 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this work a novel finite element technology based on a three-field mixed formulation is presented. The Variational Multi Scale (VMS) method is used to circumvent the LBB stability condition allowing the use of linear ...
  • A phenomenological model for the solidification of eutectic and hypoeutectic alloys including recalescence and undercooling 

    Chiumenti, Michèle; Cervera Ruiz, Miguel; Salsi, Emilio; Zonato, Andrea (2018-05)
    Article
    Accés obert
    In this work, a novel phenomenological model is proposed to study the liquid-to-solid phase change of eutectic and hypoeutectic alloy compositions. The objective is to enhance the prediction capabilities of the solidification ...
  • Appraisement of planar, bending and twisting cracks in 3D with isotropic and orthotropic damage models 

    Barbat Vlad, Gabriel; Cervera Ruiz, Miguel; Chiumenti, Michèle (Springer, 2018-03)
    Article
    Accés restringit per política de l'editorial
    This paper discusses the modeling of cracking in quasi-brittle materials using isotropic and orthotropic damage constitutive laws. A mixed strain/displacement finite element formulation is used, taking advantage of its ...
  • A strategy for the numerical simulation of metal deposition and multi-pass welding processes 

    Dialami, Narges; Chiumenti, Michèle; Agelet de Saracibar Bosch, Carlos; Cervera Ruiz, Miguel (Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this work a numerical model is developed to accurately predict temperature evolution and distortions associated to the successive welding layers deposited during the multi-pass welding and metal deposition processes (MD).
  • Clúster Agro@limentari: Exposició de treballs 

    Pujolà Cunill, Montserrat; Sorribas Royo, Francisco Javier; Sánchez Soto, Miguel; Chiumenti, Michèle; Casas Piedrafita, Óscar; Olivella, Jorge (DEAB / EETAC / Factoria BCBL, 2011-05-19)
    Audiovisual
    Accés obert
  • Comparison of a fluid and a solid approach for the numerical simulation of friction stir welding with a non-cylindrical pin 

    Bussetta, Philippe; Dialamishabankareh, Narges; Boman, Romain; Chiumenti, Michèle; Agelet de Saracibar Bosch, Carlos; Cervera Ruiz, Miguel; Ponthot, Jean Philippe (2013)
    Text en actes de congrés
    Accés obert
  • Computational modeling of multi-pass welding and metal deposition processes 

    Chiumenti, Michèle; Cervera Ruiz, Miguel; Dialami, Narges; Agelet de Saracibar Bosch, Carlos (European Scientific Association For Material Forming (ESAFORM), 2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this work a computational model for the numerical simulation of multi-pass welding and metal deposition processes is presented. A fully coupled thermo-mechanical solution, including phase-change phenomena and shrinkage ...
  • Continuum FE models for the analysis of Mallorca Cathedral 

    Roca Fabregat, Pedro; Cervera Ruiz, Miguel; Pelà, Luca; Clemente, Roberto; Chiumenti, Michèle (2013)
    Article
    Accés restringit per política de l'editorial
    From the theoretical point of view, systems composed by masonry arches or vaults would require, during construction, the simultaneous activation of all structural elements in order to reach the optimum balance of thrusts. ...
  • Coupled thermo-mechanical analysis for the numerical simulation of welding processes 

    Chiumenti, Michèle; Cervera Ruiz, Miguel; Agelet de Saracibar Bosch, Carlos (Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The aim of this paper consists of both the description of the formulation adopted for the numerical simulation of the Metal Deposition process (MD) and the experimental work carried out at ITP Industry (Industria de Turbo ...
  • Enhanced friction model for Friction Stir Welding (FSW) analysis: simulation and experimental validation 

    Dialami, Narges; Chiumenti, Michèle; Cervera Ruiz, Miguel; Segatori, A.; Osikowicz, W. (2017-11)
    Article
    Accés restringit per política de l'editorial
    Friction is one of the main heat generation mechanisms in Friction Stir Welding (FSW). This phenomenon occurs between the pin and the workpiece as the rotating tool moves along the weld line. An accurate friction model is ...