Exploració per autor "Huerta, Antonio"Més informacióMés informació

Ara es mostren els items 16-35 de 220

    • A note on upper bound formulations in limit analysis 

      Muñoz Romero, José; Huerta, Antonio; Bonet Carbonell, Javier; Peraire Guitart, Jaume (John Wiley & Sons, 2012-08-24)
      Article
      Accés restringit per política de l'editorial
      In this paper we study some recent formulations for the computation of upper bounds in limit analysis. We show that a previous formulation presented by the authors does not guarantee the strictness of the upper bound, ...

    • A posteriori error estimation for standard finite element analysis 

      Díez, Pedro; Egozcue Rubí, Juan José; Huerta, Antonio (1998-09)
      Article
      Accés obert
      A new residual type estimator based on projections of the error on subspaces of locally-supported functions is presented. The estimator is defined by a standard element-by-element refinement. First, an approximation of the ...

    • A regularised-adaptive Proper Generalised Decomposition implementation for coupled magneto-mechanical problems with application to MRI scanners 

      Barroso Gassiot, Guillem; Gil Ruiz, Antonio Javier; Ledger, Paul D.; Mallett, Mike; Huerta, Antonio (2020-01-01)
      Article
      Accés obert
      Latest developments in high-strength Magnetic Resonance Imaging (MRI) scanners with in-built high resolution, have dramatically enhanced the ability of clinicians to diagnose tumours and rare illnesses. However, their ...

    • A robust updated lagrangian smooth particle hydrodynamics for fast solid dynamics 

      Refachinho de Campos, Paulo Roberto; Antonio Javier, Gil; Chun Hean, Lee; Huerta, Antonio; Giacomini, Matteo; Bonet Carbonell, Javier (Association for Computing Machinery (ACM), 2021)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This paper introduces a new Incremental Updated Lagrangian Smooth Particle Hydrodynamics (SPH) computational framework in the form of a system of first order conservation laws. Specifically, the linear momentum conservation ...

    • A second-order face-centred finite volume method for elliptic problems 

      Vieira, Luan M.; Giacomini, Matteo; Sevilla Cárdenas, Rubén; Huerta, Antonio (2020-01-01)
      Article
      Accés obert
      A second-order face-centred finite volume method (FCFV) is proposed. Contrary to the more popular cell-centred and vertex-centred finite volume (FV) techniques, the proposed method defines the solution on the faces of the ...

    • A simple microstructural viscoelastic model for flowing foams 

      Ibáñez, Rubén; Scheuer, Adrien; Abisset-Chavanne, Emmanuelle; Chinesta, Francisco; Huerta, Antonio; Keunings, Roland (2019-03)
      Article
      Accés obert
      The numerical modelling of forming processes involving the flow of foams requires taking into account the different problem scales. Thus, in industrial applications a macroscopic approach is suitable, whereas the macroscopic ...

    • A simple shock-capturing technique for high-order discontinuous Galerkin methods 

      Huerta, Antonio; Casoni Rero, Eva; Peraire Guitart, Jaume (2012-08)
      Article
      Accés obert
      This article presents a novel shock-capturing technique for the discontinuous Galerkin (DG) method. The technique is designed for compressible flow problems, which are usually characterized by the presence of strong shocks ...

    • A staggered high-dimensional Proper Generalised Decomposition for coupled magneto-mechanical problems with application to MRI scanners 

      Barroso Gassiot, Guillem; Seoane Chouciño, Marcos; Gil Ruiz, Antonio Javier; Ledger, Paul D.; Mallett, Mike; Huerta, Antonio (2020-10-01)
      Article
      Accés obert
      Manufacturing new Magnetic Resonance Imaging (MRI) scanners represents a computational challenge to industry, due to the large variability in material parameters and geometrical configurations that need to be tested during ...

    • A superconvergent HDG method for stokes flow with strongly enforced symmetry of the stress tensor 

      Giacomini, Matteo; Karkoulias, Alexandros; Sevilla Cárdenas, Rubén; Huerta, Antonio (2018-12)
      Article
      Accés obert
      This work proposes a superconvergent hybridizable discontinuous Galerkin (HDG) method for the approximation of the Cauchy formulation of the Stokes equation using same degree of polynomials for the primal and mixed variables. ...

    • A superconvergent hybridisable discontinuous Galerkin method for linear elasticity 

      Sevilla Cárdenas, Rubén; Giacomini, Matteo; Karkoulias, Alexandros; Huerta, Antonio (John Wiley & sons, 2018-10-12)
      Article
      Accés obert
      The first superconvergent hybridisable discontinuous Galerkin method for linear elastic problems capable of using the same degree of approximation for both the primal and mixed variables is presented. The key feature of ...

    • A unified approach to remeshing strategies for finite element h-adaptativity 

      Díez, Pedro; Huerta, Antonio (1999-07)
      Article
      Accés obert
      In h-adaptivity, a remeshing strategy is needed to compute the distribution of required element size using the estimated error distribution. Several authors have introduced different remeshing strategies yielding very ...

    • A weakly compressible hybridizable discontinuous Galerkin formulation for fluid-structure interaction problems 

      Spina, Andrea la; Kronbichler, Martin; Giacomini, Matteo; Wall, Wolfgang A.; Huerta, Antonio (2020-12-01)
      Article
      Accés obert
      A scheme for the solution of fluid-structure interaction (FSI) problems with weakly compressible flows is proposed in this work. A novel hybridizable discontinuous Galerkin (HDG) method is derived for the discretization ...

    • Accuracy of two stress update algorithms for shear-free large deformations paths 

      Rodríguez Ferran, Antonio; Huerta, Antonio (1999-06)
      Article
      Accés obert
      The behavior of two stress update algorithms for shear-free large deformation paths is analyzed. The first algorithm has a truncation error of order 1. The second algorithm has a truncation error of order 2. As a consequence, ...

    • Accurate upper and lower error bounds by solving flux-free local problems in 

      Díez, Pedro; Parés Mariné, Núria; Huerta, Antonio (2004-12)
      Article
      Accés obert
      Two implicit residual type estimators yielding upper bounds of the error are presented which do not require flux equilibration. One of them is based on the ideas introduced in [MAC 00, CAR 99, MOR 03, PRU 02]. The new ...

    • Adaptació de l’ensenyament semipresencial dels mètodes numèrics dins del marc del sistema ects 

      Sarrate Ramos, Josep; Rodríguez Ferran, Antonio; Fernández Méndez, Sonia; Sevilla Cárdenas, Rubén; Rozados, Oriol; Díez, Pedro; Huerta, Antonio (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2008-02-07)
      Text en actes de congrés
      Accés obert
      En l’actualitat els mètodes numèrics s’han consolidat com una disciplina horitzontal en l’àmbit de l’enginyeria civil. En aquest sentit, les assignatures bàsiques relacionades directament amb els mètodes numèrics han ...

    • Adapting Broyden method to handle linear constraints imposed via Lagrange multipliers 

      Rodríguez Ferran, Antonio; Huerta, Antonio (Wiley and Sons, 1999-09)
      Article
      Accés obert
      Various non-linear equation solvers are adapted to handle linear constraints via the Lagrange-multiplier technique. This adaptation process turns out to be quite straightforward for Newton-Raphson methods and rank-two ...

    • Adaptive analysis based on error estimation for nonlocal damage models 

      Rodríguez Ferran, Antonio; Arbós, I; Huerta, Antonio (2001-05)
      Article
      Accés obert
      An adaptive finite element strategy for nonlocal damage computations is presented. The proposed approach is based on the combination of a residual-type error estimator and quadrilateral h-remeshing. A distinctive feature ...

    • Adaptive analysis of yield line patterns in plates with the Arbitrary Lagrangian-Eulerian method 

      Askes, Harm; Rodríguez Ferran, Antonio; Huerta, Antonio (1999-02)
      Article
      Accés obert
      Plasticity models provide suitable tools to describe the so-called yield line pattern that occurs with the failure of plates. However, in a Lagrangian description a huge number of finite elements are needed for accurate ...

    • Adaptive finite element strategies based on error assessment 

      Huerta, Antonio; Rodríguez Ferran, Antonio; Díez, Pedro; Sarrate Ramos, Josep (Wiley and Sons, 1999-09)
      Article
      Accés obert
      Two main ingredients are needed for adaptive finite element computations. First, the error of a given solution must be assessed, by means of either error estimators or error indicators. After that, a new spatial discretization ...

    • Adaptivity based on error estimation for viscoplastic softening materials 

      Díez, Pedro; Arroyo Balaguer, Marino; Huerta, Antonio (2000-02)
      Article
      Accés obert
      This paper focuses on the numerical simulation of strain softening mechanical problems. Two problems arise: (1) the constitutive model has to be regular and (2) the numerical technique must be able to capture the two scales ...