Exploració per autor "Rodríguez Ferran, Antonio"
Ara es mostren els items 22-41 de 140
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A shifted boundary method based on extension operators
Zorrilla Martínez, Rubén; Rossi, Riccardo; Scovazzi, Guglielmo; Canuto, Claudio; Rodríguez Ferran, Antonio (Elsevier, 2024-03)
Article
Accés obertWe consider formulations of the Shifted Boundary Method based on extrapolation operators other than the Taylor expansion. In the specific case of the Poisson equation, we prove that this approach is stable, provided some ... -
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 obertFor 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 obertThe 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 obertEn 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 obertVarious 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 obertAn 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 obertPlasticity 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 obertTwo 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'editorialAn 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 obertA 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 obertA 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 obertIn 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 ... -
An optimization-based phase-field method for continuous-discontinuous crack propagation
Geelen, Rudy J.; Liu, Yingjie; Dolbow, John E.; Rodríguez Ferran, Antonio (John Wiley & sons, 2018-10-05)
Article
Accés obertA new continuous-discontinuous strategy for the computational modeling of crack propagation within the context of phase-field models of fracture is presented. The method is designed to introduce and update a sharp crack ... -
An SEA-like model for double walls filled with absorbing materials
Díaz Cereceda, Cristina; Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2012)
Text en actes de congrés
Accés obertModelling absorbing materials with statistical energy analysis (SEA) is an open issue. They are neither reverberant subsystems nor conservative couplings. The absorbing material layers located inside the cavities of ... -
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)
Text en actes de congrés
Accés obertDifferent 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. ... -
Application of inverse SEA models to obtain the Coupling LossFactor in structural junctions from numerical simulations
Poblet-Puig, Jordi; Rodríguez Ferran, Antonio (2019)
Text en actes de congrés
Accés obertAn inverse SEA procedure that mimics the Experimental SEA (ESEA) is used in order to obtain the Coupling Loss Factor (CLF) of structural junctions. The main differences with respect to ESEA are that: 1) the subsystem ... -
Applications of numerical differentiation to computational plasticity
Pérez Foguet, Agustí; Rodríguez Ferran, Antonio; Huerta, Antonio (1998-07)
Report de recerca
Accés obert -
Arbitrary Lagrangian-Eulerian (ALE) formulation for hyperelastoplasticity
Rodríguez Ferran, Antonio; Pérez Foguet, Agustí; Huerta, Antonio (Wiley and Sons, 2002-02)
Article
Accés obertThe 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 formulation of quasistatic nonlinear problems
Rodríguez Ferran, Antonio (Universitat Politècnica de Catalunya, 1996-10-18)
Tesi
Accés obertEn esta tesis se presenta una metodología para la simulación numérica de procesos cuasistaticos en mecánica de sólidos no lineal, basada en una formulación arbitrariamente lagrangiana-euleriana (ale) del problema. Se hace ... -
Arbitrary Lagrangian-Eulerian methods
Donea, J; Huerta, Antonio; Ponthot, J -Ph; Rodríguez Ferran, Antonio (John Wiley & Sons, 2004-10)
Capítol de llibre
Accés restringit per política de l'editorialAim 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. ...