Ara es mostren els items 69-88 de 137

    • High-fidelity prediction of crack formation in 2D and 3D pullout tests 

      Benedetti, Lorenzo; Cervera Ruiz, Miguel; Chiumenti, Michele (2016-08)
      Article
      Accés obert
      This paper presents the 2D and 3D numerical analysis of pullout tests on steel anchorages in concrete blocks using standard and mixed finite elements. A novel (stabilized) mixed formulation in the variables of total strain ...
    • In situ measurements and thermo-mechanical simulation of Ti–6Al–4V laser solid forming processes 

      Lu, Xufei; Lin, Xin; Chiumenti, Michele; Cervera Ruiz, Miguel; Hu, Yunlong; Ji, Xianglin; Ma, Liang; Huang, Weidong (2019-04)
      Article
      Accés obert
      Residual stresses and distortions are two technical obstacles for popularizing the additive manufacturing (AM) technology. The evolution of the stresses in AM components during the thermal cycles of the metal depositing ...
    • Local and global approaches to Friction Stir Welding 

      Dialamishabankareh, Narges; Chiumenti, Michele; Cervera Ruiz, Miguel; Agelet de Saracibar Bosch, Carlos (International Centre for Numerical Methods in Engineering (CIMNE), 2016)
      Llibre
      Accés obert
      This paper deals with the numerical simulation of Friction Stir Welding (FSW) processes. FSW techniques are used in many industrial applications and particularly in the aeronautic and aerospace industries, where the quality ...
    • Local–global strategy for the prediction of residual stresses in FSW processes 

      Dialami, Narges; Cervera Ruiz, Miguel; Chiumenti, Michele; Agelet de Saracibar Bosch, Carlos (2017-02)
      Article
      Accés obert
      This work describes the local–global strategy proposed for the computation of residual stresses in friction stir welding (FSW) processes. A coupling strategy between the analysis of the process zone nearby the pin tool ...
    • Material flow visualization in Friction Stir Welding via particle tracing 

      Dialami Shabandarech, Narges; Chiumenti, Michele; Cervera Ruiz, Miguel; Agelet de Saracibar Bosch, Carlos; Ponthot, Jean Philippe (2015-04)
      Article
      Accés obert
      This work deals with the modeling of the material flow in Friction Stir Welding (FSW) processes using particle tracing method. For the computation of particle trajectories, three accurate and computationally efficient ...
    • Mecánica avanzada de estructuras 

      Cervera Ruiz, Miguel; González Lopez, Jose Manuel (International Centre for Numerical Methods in Engineering (CIMNE), 2020)
      Llibre
      Accés restringit per política de l'editorial
      "Mecánica Avanzada de Estructuras" tiene el objetivo de proporcionar a los estudiantes de grado de ingeniería una visión y una comprensión extendida del análisis estructural y de sus aplicaciones, máas allá del comportamiento ...
    • Mecánica de estructuras 

      Cervera Ruiz, Miguel; Blanco Díaz, Elena Irma (Edicions UPC, 2002)
      Llibre
      Accés restringit a la comunitat UPC
      Conté: 1. Resistencia de materiales 2. Métodos de análisis
    • Mechanical analysis and optimized performance of G-Code driven material extrusion components 

      Rivet Fernández, Iván; Dialamishabankareh, Narges; Cervera Ruiz, Miguel; Chiumenti, Michele; Valverde Guzmán, Quino Martín (Elsevier, 2023-01)
      Article
      Accés restringit per política de l'editorial
      In this work an end-to-end optimization procedure to maximize the mechanical performance of Additive Manufacturing (AM) components is presented. Material Extrusion (ME) is the selected demonstrative AM technology, but the ...
    • Mechanism-Based damage and failure of Fused Filament Fabrication components 

      Rivet Fernández, Iván; Dialamishabankareh, Narges; Cervera Ruiz, Miguel; Chiumenti, Michele (Elsevier, 2024-02)
      Article
      Accés restringit per política de l'editorial
      Fused Filament Fabrication (FFF) is a polymer-based Additive Manufacturing (AM) technology that produces complex layered components. The characterization of the inherited orthotropic properties of FFF components and their ...
    • Mitigation of residual stresses and microstructure homogenization in directed energy deposition processes 

      Lu, Xufei; Chiumenti, Michele; Cervera Ruiz, Miguel; Zhang, Guohao; Lin, Xin (2022-12)
      Article
      Accés obert
      In additive manufacturing (AM), residual stresses and microstructural inhomogeneity are detrimental to the mechanical properties of as-built AM components. In previous studies, the reduction of the residual stresses and ...
    • Mixed Stabilized Finite Element Methods in Nonlinear Solid Mechanics. Part I: Formulation 

      Cervera Ruiz, Miguel; Chiumenti, Michele; Codina, Ramon (2009-07-22)
      Article
      Accés obert
      This paper exploits the concept of stabilized finite element methods to formulate stable mixed stress/displacement and strain/displacement finite elements for the solution of nonlinear solid mechanics problems. The different ...
    • Mixed Stabilized Finite Element Methods in Nonlinear Solid Mechanics. Part II: Strain Localization 

      Cervera Ruiz, Miguel; Chiumenti, Michele; Codina, Ramon (2009-07-22)
      Article
      Accés obert
      This paper deals with the question of strain localization associated with materials which exhibit softening due to tensile straining. A standard local isotropic Rankine damage model with strain-softening is used as exemplary ...
    • Mixed stabilized finite element methods in nonlinear solid mechanics. Part III: compressible and incompressible plasticity 

      Cervera Ruiz, Miguel; Chiumenti, Michele; Benedetti, Lorenzo; Codina, Ramon (2015-03)
      Article
      Accés obert
      This paper presents the application of a stabilized mixed strain/displacement finite element formulation for the solution of nonlinear solid mechanics problems involving compressible and incompressible plasticity. The ...
    • Modeling material failure in concrete structures under cyclic actions 

      Faria, R; Oliver Olivella, Xavier; Cervera Ruiz, Miguel (2004-12)
      Article
      Accés obert
      A constitutive model devised for the analysis of concrete structures, and suitable for generic two- or three-dimensional applications, is presented and validated. For plain concrete a tension-compression distinguishing ...
    • Modeling of microstructure evolution of Ti6Al4V for additive manufacturing 

      Salsi, Emilio; Chiumenti, Michele; Cervera Ruiz, Miguel (Multidisciplinary Digital Publishing Institute (MDPI), 2018-08)
      Article
      Accés obert
      AM processes are characterized by complex thermal cycles that have a deep influence on the microstructural transformations of the deposited alloy. In this work, a general model for the prediction of microstructure evolution ...
    • Modeling of spillage and debris floods as Newtonian and Viscoplastic Bingham flows with free surface with mixed stabilized finite elements 

      Moreno, Elvira; Dialamishabankareh, Narges; Cervera Ruiz, Miguel (2021-04)
      Article
      Accés obert
      This work deals with the numerical modeling of spillage and debris floods as Newtonian and viscoplastic Bingham flows with free surface using mixed stabilized finite elements. The main objective is the determination of the ...
    • Modeling of the effect of the building strategy on the thermomechanical response of Ti-6Al-4V rectangular parts manufactured by laser directed energy deposition 

      Lu, Xufei; Cervera Ruiz, Miguel; Chiumenti, Michele; Li, Junjie; Ji, Xianglin; Zhang, Guohao; Lin, Xin (Multidisciplinary Digital Publishing Institute (MDPI), 2020-12)
      Article
      Accés obert
      Part warpage and residual stress are two of the main challenges for metal additive manufacturing (AM) as they result in lower geometric precision and poor mechanical properties of the products. This work investigates the ...
    • Modelling of Bingham and Herschel-Bulkley flows with mixed P1/P1 finite elements stabilized with Orthogonal Subgrid Scale 

      Moreno, Elvira; Larese De Tetto, Antonia; Cervera Ruiz, Miguel (2016-02)
      Article
      Accés obert
      This paper presents the application of a stabilized mixed pressure/velocity finite element formulation to the solution of viscoplastic non-Newtonian flows. Both Bingham and Herschel–Bulkley models are considered. The detail ...
    • El modelo de daño localizado aplicado al análisis de estructuras de obra de fábrica 

      Clemente, Roberto; Cervera Ruiz, Miguel; Roca Fabregat, Pedro (Universitat Politècnica de Catalunya, 2008)
      Article
      Accés obert
      La simulación de fisuras localizadas en materiales cuasifrágiles mediante la mecánica computacional es un tema de investigación que aún se encuentra abierto. En este trabajo se plantea un modelo continuo para estudiar la ...
    • Numerical analysis of the manufacturing processes of a mock-up of the ITER NHF First Wall Panel 

      González Lopez, Jose Manuel; Chiumenti, Michele; Cervera Ruiz, Miguel; Agelet de Saracibar Bosch, Carlos (2018-10)
      Article
      Accés obert
      The objective of ITER is to build a new Tokamak, with the goal of demonstrating the scientific and technical feasibility of fusion power. The First Wall Panels are the inner component of the reactor, built with different ...