Exploració per autor "Rodríguez Ferran, Antonio"Més informacióMés informació

Ara es mostren els items 13-32 de 139

    • A medial-axis-based model for propagating cracks in a regularised bulk 

      Tamayo Mas, Elena; Rodríguez Ferran, Antonio (John Wiley & Sons, 2015-02-17)
      Article
      Accés obert
      A new continuous-discontinuous strategy for the simulation of failure is presented. The continuous bulk is regularised by means of a gradient-enhanced damage model, where non-locality is introduced at the level of ...

    • A multiplicative Schwarz method with active subdomains for transient convection-diffusion problems 

      Sandoval Solis, M. Luisa; Rodríguez Ferran, Antonio (2009-02-04)
      Article
      Accés obert
      An efficient algorithm to find the solution of transient convection–diffusion problems with dominant convection is presented. The main idea is to follow the solution front and activate those subdomains where the solution ...

    • A new bipenalty formulation for ensuring time step stability in time domain computational dynamics 

      Hetherington, Jack; Rodríguez Ferran, Antonio; Askes, Harm (John Wiley & Sons, 2012-04-20)
      Article
      Accés obert

    • A new column collapse apparatus for the characterisation of the flowability of granular materials 

      Torres Serra, Joel; Romero Morales, Enrique Edgar; Rodríguez Ferran, Antonio (2020-02)
      Article
      Accés obert
      The packaging industry is lacking a standard methodology to characterise the granular flow of a wide range of powders and grains in actual handling conditions. We present a new fully-instrumented granular column collapse ...

    • A new continuous-discontinuous damage model: cohesive cracks via an accurate energy-transfer process 

      Tamayo Mas, Elena; Rodríguez Ferran, Antonio (2014-02)
      Article
      Accés obert
      A new continuous-discontinuous strategy to describe failure of quasi-brittle materials is presented. For the early stages of the failure process, a gradient-enhanced model based on smoothed displacements is employed. As ...

    • A new damage model based on non-local displacements 

      Rodríguez Ferran, Antonio; Morata, I; Huerta, Antonio (2005-04)
      Article
      Accés obert
      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 granular column collapse device to characterise flowability of bulk materials 

      Torres Serra, Joel; Romero Morales, Enrique Edgar; Rodríguez Ferran, Antonio (Multidisciplinary Digital Publishing Institute (MDPI), 2018-07)
      Article
      Accés obert
      A wide range of bulk materials with different physical properties are nowadays handled in the packaging industry using different material conveying techniques. Nevertheless, experimental methodologies to characterise ...

    • A note on a numerical benchmark test: an axisymmetric shell under ring loads 

      Vila Rius, Agnès; Rodríguez Ferran, Antonio; Huerta, Antonio (1997-03)
      Article
      Accés obert
      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 numerical technique for obtaining SEA coupling loss factors in double walls 

      Díaz Cereceda, Cristina; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2012)
      Text en actes de congrés
      Accés obert
      Double walls usually consist of two leaves of material connected by steel studs. Aside from improving the structural performance, studs create a vibration transmission path which connects the two leaves. There is interest ...

    • A subsystem identification method based on the path concept with coupling strength estimation 

      Magrans Fontrodona, Francesc Xavier; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2018-02)
      Article
      Accés obert
      For complex geometries, the definition of the subsystems is not a straightforward task. We present here a subsystem identification method based on the direct transfer matrix, which represents the first-order paths. The key ...

    • 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, ...

    • 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 ...

    • Adaptive phase-field modeling of fracture in orthotropic composites 

      Ishank, Jain; Muixí Ballonga, Alba; Annavarapu, Chandrasekhar; Mulay, Shantanu; Rodríguez Ferran, Antonio (2023-11-15)
      Article
      Accés restringit per política de l'editorial
      An adaptive phase-field method is developed and applied to model fracture propagation in orthotropic composites. The proposed approach extends the work of Muixí et al. (2020) to orthotropic composites through following ...

    • Adaptive refinement for phase-field models of brittle fracture based on Nitsche's method 

      Muixí Ballonga, Alba; Fernández Méndez, Sonia; Rodríguez Ferran, Antonio (Springer, 2020-03-18)
      Article
      Accés obert
      A new adaptive refinement strategy for phase-field models of brittle fracture is proposed. The approach provides a computationally efficient solution to the high demand in spatial resolution of phase-field models. The ...

    • ALE stress update for transient and quasistatic processes 

      Rodríguez Ferran, Antonio; Casadei, F.; Huerta, Antonio (Wiley and Sons, 1998-09)
      Article
      Accés obert
      A key issue in Arbitrary Lagrangian-Eulerian (ALE) non-linear solid mechanics is the correct treatment of the convection terms in the constitutive equation. These convection terms, which reflect the relative motion between ...

    • An energy model for the acoustic insulation of absorbing materials 

      Díaz Cereceda, Cristina; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (Sociedad Española de Métodos Numéricos en Ingeniería (SEMNI), 2013)
      Text en actes de congrés
      Accés obert
      In this work an energy model for the acoustic insulation of absorbing ma- terials is shown. This model is an extension of Statistical Energy Analysis (SEA) [1] in order to account for the effect of non-conservative ...