Enviaments recents

  • Velocity-based formulations for standard and quasi-incompressible hypoelastic-plastic solids 

    Franci, Alessandro; Oñate Ibáñez de Navarra, Eugenio; Carbonell Puigbó, Josep Maria (John Wiley & Sons, 2016-09)
    Article
    Accés restringit per política de l'editorial
    We present three velocity-based updated Lagrangian formulations for standard and quasi-incompressible hypoelastic-plastic solids. Three low-order finite elements are derived and tested for non-linear solid mechanics problems. ...
  • A hierarchical finite element for composite laminated beams using a refined zigzag theory 

    Nallim, Liz G.; Oller Martínez, Sergio Horacio; Oñate Ibáñez de Navarra, Eugenio; Flores, Fernando Gabriel (2017-03)
    Article
    Accés restringit per política de l'editorial
    In this work a kinematics for laminated beams enriched with a refined formulation ZigZag (RZT), originally presented by Tessler et al. in 2007, introduced in a hierarchical one dimensional type “p” finite element is ...
  • A FIC-based stabilized mixed finite element method with equal order interpolation for solid–pore fluid interaction problems 

    Pouplana Sarda, Ignasi de; Oñate Ibáñez de Navarra, Eugenio (2017-01)
    Article
    Accés restringit per política de l'editorial
    A new mixed displacement-pressure element for solving solid–pore fluid interaction problems is presented. In the resulting coupled system of equations, the balance of momentum equation remains unaltered, while the mass ...
  • Surface tension problems solved with the particle finite element method using large time-steps 

    Gimenez, Juan M.; Nigro, Norberto; Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (Elsevier, 2016-12)
    Article
    Accés restringit per política de l'editorial
    In previous works [S. R. Idelsohn, J. Marti, P. Becker, E. Oñate, Analysis of multifluid flows with large time steps using the particle finite element method, International Journal for Numerical Methods in Fluids 75 (9) ...
  • Lagrangian finite element model for the 3D simulation of glass forming processes 

    Ryzhakov, Pavel; García Espinosa, Julio; Oñate Ibáñez de Navarra, Eugenio (2016-12)
    Article
    Accés restringit per política de l'editorial
    We propose here a numerical model for a three-dimensional simulation of glass forming processes. Using the basic philosophy of the Particle Finite Element method (PFEM), we introduce several new features adapting the ...
  • The Double Hierarchy Method: a parallel 3D contact method for the interaction of spherical particles with rigid FE boundaries using the DEM 

    Santasusana, Miquel; Irazábal González, Joaquín; Oñate Ibáñez de Navarra, Eugenio; Carbonell Puigbó, Josep Maria (Springer, 2016-07)
    Article
    Accés restringit per política de l'editorial
    In this work, we present a new methodology for the treatment of the contact interaction between rigid boundaries and spherical discrete elements (DE). Rigid body parts are present in most of large-scale simulations. The ...
  • Interpretation of dam deformation and leakage with boosted regression trees 

    Salazar González, Fernando; Toledo Municio, Miguel Ángel; Oñate Ibáñez de Navarra, Eugenio; Suárez Arroyo, Benjamín (2016-07)
    Article
    Accés restringit per política de l'editorial
    Predictive models are essential in dam safety assessment. They have been traditionally based on simple statistical tools such as the hydrostatic-season-time (HST) model. These tools are well known to have limitations in ...
  • Lidar inversion of atmospheric backscatter and extinction-to-backscatter ratios by use of a Kalman filter 

    Rocadenbosch Burillo, Francisco; Soriano Ortiz, Cecilia; Comerón Tejero, Adolfo; Baldasano Recio, José María (1999-03)
    Article
    Accés restringit per política de l'editorial
    A first inversion of the backscatter profile and extinction-to-backscatter ratio from pulsed elastic-backscatter lidar returns is treated by means of an extended Kalman filter (EKF). The EKF approach enables one to overcome ...
  • Unified Lagrangian formulation for solid and fluid mechanics and FSI problems 

    Franci, Alessandro; Oñate Ibáñez de Navarra, Eugenio; Carbonell Puigbó, Josep Maria (2016-01)
    Article
    Accés restringit per política de l'editorial
    We present a Lagrangian monolithic strategy for solving fluid-structure interaction (FSI) problems. The formulation is called Unified because fluids and solids are solved using the same solution scheme and unknown variables. ...
  • On the effect of the bulk tangent matrix in partitioned solution schemes for nearly incompressible fluids 

    Franci, Alessandro; Oñate Ibáñez de Navarra, Eugenio; Carbonell Puigbó, Josep Maria (John Wiley & Sons, 2015-04)
    Article
    Accés obert
    The purpose of this paper is to study the effect of the bulk modulus on the iterative solution of free surface quasi-incompressible fluids using a mixed partitioned scheme. A practical rule to set up the value of a pseudo-bulk ...

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