Now showing items 21-40 of 194

  • A multidimensional data-driven sparse identification technique: the sparse proper generalized decomposition 

    Ibáñez Pinillo, Rubén; Abisset Chavanne, Emmanuelle; Ammar, Amine; González Ibáñez, David; Cueto Prendes, Elias; Huerta, Antonio; Duval, Jean Louis; Chinesta Soria, Francisco (2018-01-01)
    Article
    Open Access
    Sparse model identification by means of data is especially cumbersome if the sought dynamics live in a high dimensional space. This usually involves the need for large amount of data, unfeasible in such a high dimensional ...
  • Analysis of the vane test considering size and time effects 

    Pérez Foguet, Agustí; Ledesma Villalba, Alberto; Huerta, Antonio (1997-09)
    External research report
    Open Access
  • Analysis of the vane test considering size and time effects 

    Pérez Foguet, Agustí; Ledesma Villalba, Alberto; Huerta, Antonio (1999-04)
    Article
    Open Access
    An analysis of the vane test using an Arbitrary Lagrangian-Eulerian formulation within a finite element framework is presented. This is suitable for soft clays for which the test is commonly used to measure in situ undrained ...
  • An elastic plastic damage formulation for concrete: application to elementary and structural tests 

    Jason, L; Huerta, Antonio; Pijaudier-Cabot, Gilles; Ghavamian, S (2006-11)
    Article
    Open Access
    Pure elastic damage models or pure elastic plastic constitutive laws are not totally satisfactory to describe the behaviour of concrete. They indeed fail to reproduce the unloading slopes during cyclic loading which define ...
  • An error estimator for separated representations of highly multidimensional models 

    Asaad Ammaar, Mouafk; Chinesta, F.; Díez, F.; Huerta, Antonio (2010)
    Article
    Open Access
  • A new damage model based on non-local displacements 

    Rodríguez Ferran, Antonio; Morata, I; Huerta, Antonio (2005-04)
    Article
    Open Access
    A new non-local damage model is presented. Non-locality (of integral or gradient type) is incorporated into the model by means of non-local displacements. This contrasts with existing damage models, where a non-local strain ...
  • A new least-squares approximation of affine mappings for sweep algorithms 

    Roca Navarro, Francisco Javier; Sarrate Ramos, Josep; Huerta, Antonio (2010-06)
    Article
    Open Access
    This paper presents a new algorithm to generate hexahedral meshes in extrusion geometries. Several algorithms have been devised to generate hexahedral meshes by projecting the cap surfaces along a sweep path. In all of ...
  • An improved algorithm to smooth graded quadrilateral meshes preserving the prescribed element size 

    Sarrate Ramos, Josep; Huerta, Antonio (2001-02)
    Article
    Open Access
    In the generation of quadrilateral unstructured meshes, special attention is focussed to the shape of the elements. This is because it is well known that the distortion of the elements and the accuracy of the analysis are ...
  • A note on a numerical benchmark test: an axisymmetric shell under ring loads 

    Vila Rius, Agnès; Rodríguez Ferran, Antonio; Huerta, Antonio (1997-03)
    Article
    Open Access
    In this paper, a well-known numerical benchmark test which is usually solved with displacement control for low values of the load eccentricity is examined for a complete range of eccentricities of the ring load. For a ...
  • A note on upper bound formulations in limit analysis 

    Muñoz Romero, José; Huerta, Antonio; Bonet Carbonell, Javier; Peraire, Jaume (John Wiley & Sons, 2012-08-24)
    Article
    Restricted access - publisher's policy
    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, ...
  • An upwind cell centred Total Lagrangian finite volume algorithm for nearly incompressible explicit fast solid dynamic applications 

    Haider, Jibran; Lee, Chun Hean; Gil, Antonio; Huerta, Antonio; Bonet Carbonell, Javier (2018-10-01)
    Article
    Restricted access - publisher's policy
    The paper presents a new computational framework for the numerical simulation of fast large strain solid dynamics, with particular emphasis on the treatment of near incompressibility. A complete set of first order hyperbolic ...
  • A posteriori error estimation for standard finite element analysis 

    Díez, Pedro; Egozcue Rubí, Juan José; Huerta, Antonio (1998-09)
    Article
    Open Access
    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 ...
  • Application of an ALE formulation for density-dependent hyperelastic-plastic models to the simulation of powder compaction processes 

    Pérez Foguet, Agustí; Rodríguez Ferran, Antonio; Huerta, Antonio (2001)
    Conference report
    Open Access
    Different quasi-static cold compaction processes of powders have been simulated with a density-dependent plastic model. The model is formulated within the framework of isotropic finite strain multiplicative hyperelastoplasticity. ...
  • Applications of numerical differentiation to computational plasticity 

    Pérez Foguet, Agustí; Rodríguez Ferran, Antonio; Huerta, Antonio (1998-07)
    External research report
    Open Access
  • Arbitrary Lagrangian-Eulerian (ALE) formulation for hyperelastoplasticity 

    Rodríguez Ferran, Antonio; Pérez Foguet, Agustí; Huerta, Antonio (Wiley and Sons, 2002-02)
    Article
    Open Access
    The arbitrary Lagrangian-Eulerian (ALE) description in non-linear solid mechanics is nowadays standard for hypoelastic-plastic models. An extension to hyperelastic-plastic models is presented here. A fractional-step method ...
  • Arbitrary Lagrangian–Eulerian (ALE) formulation for hyperelastoplasticity 

    Rodríguez Ferran, Antonio; Pérez Foguet, Agustí; Huerta, Antonio (John Wiley & Sons, 2002)
    Article
    Open Access
    The arbitrary Lagrangian–Eulerian (ALE) description in non-linear solid mechanics is nowadays stan- dard for hypoelastic–plastic models. An extension to hyperelastic–plastic models is presented here. A fractional-step ...
  • Arbitrary lagrangian-eulerian finite element analysis of strain localization in transient problems 

    Pijaudier-Cabot, Gilles; Bode, L; Huerta, Antonio (John Wiley & Sons, 1995-10)
    Article
    Open Access
    Non-local models guaranty that finite element computations on strain softening materials remain sound up to failure from a theoretical and computational viewpoint. The non-locality prevents strain localization with zero ...
  • Arbitrary Lagrangian-Eulerian formulation for fluid-rigid body interaction 

    Sarrate Ramos, Josep; Huerta, Antonio; Donea, J (2001-03)
    Article
    Open Access
    A new formulation for two-dimensional fluid–rigid body interaction problems is developed. In particular, vortex-induced oscillations of a rigid body in viscous incompressible flow are studied. The incompressible Navier–Stokes ...
  • Arbitrary Lagrangian-Eulerian methods 

    Donea, J; Huerta, Antonio; Ponthot, J -Ph; Rodríguez Ferran, Antonio (John Wiley & Sons, 2004-10)
    Part of book or chapter of book
    Restricted access - publisher's policy
    Aim of the present chapter is to provide an in-depth survey of arbitrary Lagrangian-Eulerian (ALE) methods, including both conceptual aspects of the mixed kinematical description and numerical implementation details. ...
  • Arbitrary Lagrangian–Eulerian methods 

    Donéa, Jean M.; Huerta, Antonio; Ponthot, Jean Philippe; Rodríguez Ferran, Antonio (Wiley, 2017-12-15)
    Part of book or chapter of book
    Restricted access - publisher's policy
    This chapter presents an overview of some computational methods for the analysis of problems in ship hydrodynamics. Attention is focused on the description of stabilized finite element formulations derived via a finite ...