• J. Oliver, A. Huespe, S. Blanco, D. Linero
    (2004). Research Report, Nº PI258

    Abstract
    Robustness and stability of the Continuum Strong Discontinuity Approach (CSDA) to material failure are addressed. After identification of lack of symmetry of the finite element  [...]

  • (2004). Research Report, Nº PI257

    Abstract
    The objective of the project that is presented at the IV Prize Duran i Farell Award for Research and Technology is the development of a new computational code based on the [...]

  • E. Pahl
    (2004). Research Report, Nº PI256

    Abstract
    This paper is an attempt at describing the State of the Art of the vast field of continuous optimization. We will survey deterministic and stochastic methods as well as hybrid [...]

  • (2004). Research Report, Nº PI254

    Abstract
    El método Level Set utilizado en un amplio espectro de problemas de distinta índole, como la simulación de interfaces entre fluidos, el tratamiento de [...]

  • R. López
    (2004). Research Report, Nº PI253

    Abstract
    In this work we introduce the basic concepts of neural networks, their learning paradigms and learning tasks. We also describe diferent neuron models and network architectures. [...]

  • B. Boroomand, F. Mossaiby
    (2004). Research Report, Nº PI251

    Abstract
    In this part of the paper we shall use the formulation given in the first part to assess the quality of recovery based error estimators using two recovery methods, i.e. Superconvergent [...]

  • J. Rojek, E. Oñate, M. Chiumenti, M. Luege, F. Zarate, O. Fruitos, A. Ferriz, S. Oller
    (2004). Research Report, Nº PI252

    Abstract
    This report presents review of the state of the art of numerical modelling of polymers and polymer coated metal laminates and gives details of selected numerical models including [...]

  • (2004). Research Report, Nº PI246

    Abstract
    En los últimos años CIMNE ha desarrollado en colaboración con la empresa COMPASS Ingeniería y Sistemas, S.A. (www.compassis.com) un nuevo código [...]

  • J. Jiménez, A. Priegue, F. Guzmán, E. Oñate
    (2005). Research Report, Nº PI279

    Abstract
      Este trabajo presenta los desarrollos llevados a cabo en CIMNE en la programación y gestión de redes de motas utilizando Internet. El trabajo se enmarca [...]

  • J. Piazzese, J. Jiménez, E. Oñate
    (2005). Research Report, Nº PI268

  • B. Boroomand, F. Mossaiby
    (2005). Research Report, Nº PI267

    Abstract
    In this report dynamic solution of unbounded domains using pure finite element method is presented. The problems of concern are those with governing differential equations [...]

  • J. Jiménez, A. Priegue, J. Piazzese, E. Oñate
    (2005). Research Report, Nº PI277

  • M. Tessler
    (2005). Research Report, Nº PI276

    Abstract
    As part of the NASA Floyd L.Thompson Fellowship, the author spent four months in the beginning of 2005 at the International Center for Numerical Methods in Engineering (CIMNE) [...]

  • E. Ortega, R. Flores, E. Oñate
    (2005). Research Report, Nº PI275

    Abstract
    An edge-based high-resolution scheme for the solution of the compressible Euler equations on unstructured finite elements grids is presented. The flow solver adopted in the [...]

  • (2005). Research Report, Nº PI274

    Abstract
    En este documento se presenta el estudio iniciado por el autor durante su estancia en el Centro Internacional de Métodos Numéricos en Ingeniería de la [...]

  • J. Jiménez, A. Priegue, E. Oñate
    (2005). Research Report, Nº PI272

  • L. Villa
    (2005). Research Report, Nº PI271

  • A. Fung, E. Pahl, G. Bugeda, E. Oñate
    (2005). Research Report, Nº PI270

    Abstract
    An optimization code called Optima has been developed at the International Centre for Numerical Methods in Engineering (CIMNE). This report validates two reputably robust [...]

  • B. Boroomand, A. Barekatein
    (2006). Research Report, Nº PI298

    Abstract
    In this report we propose a stabilization method for topology optimization of planes. The method can be classified in the category of continuation methods. The new continuation [...]

  • N. Parés, P. Díez, A. Huerta
    (2006). Research Report, Nº PI297

    Abstract
    Classical implicit residual type error estimators require using an underlying spatial finer mesh to compute bounds for some quantity of interest. Consequently, the bounds [...]

  • (2006). Research Report, Nº PI296

    Abstract
    This paper recovers the original spirit of the continuous crack approaches, where displacements jumps across the crack are smeared over the affected elements and the behaviour [...]

  • M. Cervera, M. Chiumenti
    (2006). Research Report, Nº PI294

    Abstract
    This paper describes a procedure for the solution of problems involving tensile cracking using the so-called smeared crack approach, that is, standard finite elements [...]

  • (2006). Research Report, Nº PI293

    Abstract
    We present a general formulation for modeling bed erosion in free surface flows using the particle finite element method (PFEM). The key feature of the PFEM is the use of [...]

  • (2006). Research Report, Nº PI292

    Abstract
    El objetivo de este trabajo es obtener una formulación constitutiva general que permita representar el comportamiento –crecimiento y decrecimiento natural / patológico, [...]

  • Y. Fragakis
    (2006). Research Report, Nº PI291

    Abstract
    In recent years, Domain Decomposition Methods (DDM) have emerged as advanced solvers in several areas of computational mechanics. In particular, during the last decade, in [...]

  • Y. Fragakis
    (2006). Research Report, Nº PI290

    Abstract
    In recent years, Domain Decomposition Methods (DDM) have emerged as advanced solvers in several of computational mechanics. In particular, during the last decade, in the area [...]

  • (2006). Research Report, Nº PI289

    Abstract
    In this paper we present a stabilized finite element formulation to solve the Oseen equations as a model problem involving both convection effects and the incompressibility [...]

  • (2006). Research Report, Nº PI288

    Abstract
    One of the aims of this text is to show some important results in LES modelling and to identify which are main mathematical problems for the development of a complete theory. [...]

  • S. Badia, R. Codina
    (2006). Research Report, Nº PI287

    Abstract
    In this paper we suggest some algorithms for the fluid-structure interaction problem stated using a domain decomposition framework. These methods involve stabilized pressure [...]

  • S. Badia, R. Codina
    (2006). Research Report, Nº PI286

    Abstract
    In this paper we introduce some pressure segregation methods obtained from a non-standard version of the discrete monolithic system, where the continuity equation has been [...]

  • S. Badia, R. Codina
    (2006). Research Report, Nº PI285

    Abstract
    In this paper we analyze a stabilized finite element method to approximate the convection diffusion equation on moving domains using an ALE framework. As basic numerical strategy, [...]

  • R. Codina, S. Badia
    (2006). Research Report, Nº PI284

    Abstract
    In this paper we treat several aspects related to time integration methods for the incompressible Navier-Stokes equations that allow to uncouple the calculation of the velocities [...]

  • E. Oñate, C. Felippa
    (2006). Research Report, Nº PI283

    Abstract
    We present a variational formulation of the finite calculus (FIC) equations for problems in mechanics governed by differential equations with symmetric operators. Applications [...]

  • (2006). Research Report, Nº PI282

    Abstract
    We present a general formulation for incompressible fluid flow analysis using the finite element method. The necessary stabilization for dealing with convective effects and [...]

  • R. Löhner, C. Yang, E. Oñate
    (2006). Research Report, Nº PI281

    Abstract
    A volume of fluid (VOF) technique has been developed and coupled with an incompressible Euler/Navier–Stokes solver operating on adaptive, unstructured grids to simulate [...]

  • J. Arteaga-Gomez, R. Löhner, J. Rojek, E. Oñate
    (2006). Research Report, Nº PI280

    Abstract
    This paper describes the coupling of FEFLO, a general purpose compressible and incompressible flow solver base on adaptive unstructured grids with SIMPACT, a general purpose, [...]

  • (2007). Research Report, Nº PI312

    Abstract
    El CIMNE (www.cimne.com), un centre de recerca consorci entre la Universitat Politècnica de Catalunya i la Generalitat de Catalunya, fa vint anys. El CIMNE està [...]

  • K. Lam
    (2007). Research Report, Nº PI307

    Abstract
    This report investigates the free surface capture of the Overlapping Domain Decomposition Level Set Method (ODDLS). The CFD software Tdyn is used to carry out computations [...]

  • A. Daring, R. López, R. Flores, G. Bugeda, E. Oñate
    (2007). Research Report, Nº PI306

    Abstract
    An optimization methodology based on neural networks was developed for use in 2D optimal shape design problems. Neural networks were used as a parameterization scheme to represent [...]

  • I. Ortigoza, J. García-Espinosa
    (2007). Research Report, Nº PI305

    Abstract
    In this work we will be based on two experimental-based statistical techniques, which allow us to determine approximately the residual resistance coefficient of the sailboat [...]

  • (2007). Research Report, Nº PI304

    Abstract
    We present a formulation for analysis of turbulent incompressible flows using a stabilized finite element method (FEM) based on the finite calculus (FIC) procedure. The stabilization [...]

  • E. Oñate, F. Flores, L. Neamtu
    (2007). Research Report, Nº PI302

    Abstract
    An enhanced rotation-free three node triangular shell element (termed EBST) is presented. The element formulation is based on a quadratic interpolation of the geometry in [...]

  • E. Oñate, F. Flores, J. Marcipar
    (2007). Research Report, Nº PI303

    Abstract
    This paper shows applications of a recently developed thin shell element adequate for the analysis of membrane and inflatable structures. The element is a three node triangle [...]

  • R. Sevilla, S. Fernández-Méndez, A. Huerta
    (2007). Research Report, Nº PI309

    Abstract
    In this work the NURBS-Enhanced Finite Element Method (NEFEM) is combined with a Discontinuous Galerkin (DG) formulation for the numerical solution of the Euler equations [...]

  • R. Sevilla, S. Fernández-Méndez, A. Huerta
    (2007). Research Report, Nº PI308

    Abstract
    An improvement of the classical finite element method is proposed. It is able to exactly represent the geometry by means of the usual CAD description of the boundary with [...]

  • E. Oñate, B. Suárez, J. Canet
    (2007). Research Report, Nº PI301

    Abstract
    Se presenta un resumen de las posibilidades de diversos métodos numéricos basados en la combinación de técnicas de elementos finitos y de partículas [...]

  • A. Barbat, L. Pujades, O. Cardona
    (2007). Research Report, Nº PI300

    Abstract
    En este informe se estudian los métodos numéricos orientados hacia el cálculo de la seguridad de las estructuras, a la evaluación de su vulnerabilidad [...]

  • N. Parés, P. Díez, A. Huerta
    (2007). Research Report, Nº PI299

    Abstract
    The paper introduces a methodology to compute upper and lower bounds for linear-functional outputs of the exact solutions of parabolic problems. In this second part, the bounds [...]

  • M. Kouhi, E. Oñate, G. Bugeda
    (2008). Research Report, Nº PI328

    Abstract
    This document is an introduction to some important methodologies that have been developed in robust design in aerospace engineering. After describing the concept of robustness [...]

  • R. Rossi, E. Oñate, A. Maymó
    (2008). Research Report, Nº PI327

    Abstract
    This diploma thesis deals with the implementation of a fluid solver for incompressible and compressible flows within the multi-physics framework Kratos. The presentation of [...]

  • R. Flores, E. Ortega
    (2008). Research Report, Nº PI326

    Abstract
    The PUMI flow solver has been developed at CIMNE in to address the need for fast solutions of the flow field around complex geometries. Nowadays calculations involving a number [...]

  • D. Chemisana, J. Cipriano, M. Ibáñez, B. Mesih, A. Mellor
    (2008). Research Report, Nº PI325

    Abstract
    This paper presents the thermal evaluation of an evacuated PVT collector designed to operate under concentrated radiation (15 suns). Finite volume 3D numerical computations [...]

  • (2008). Research Report, Nº PI323

    Abstract
    The Finite Point Method (FPM) is a meshless technique which is based on both, a Weighted Least-Squares numerical approximation on local clouds of points and a collocation [...]

  • Z. Tang, J. Periaux, G. Bugeda, E. Oñate
    (2008). Research Report, Nº PI322

    Abstract
    In this paper, the aerodynamic shape optimization problems with uncertain operating conditions has been addressed. After a review of robust control theory and the possible [...]

  • M. Bordone, E. Oñate, E. Soudah, M. Chiumenti
    (2008). Research Report, Nº PI317

    Abstract
    Las enfermedades cardiovasculares son la primera causa de muerte de la población Europea. Se estima que la mortalidad por enfermedades cardiovasculares es la mitad [...]

  • (2008). Research Report, Nº PI316

    Abstract
    En este informe se describen algunos de los desarrollos recientes en modelos constitutivos avanzados para el comportamiento no lineal de materiales de construcción. [...]

  • J. Cipriano, C. Lodi, D. Chimisana, G. Houzeaux, O. Perpiñan
    (2008). Research Report, Nº PI324

    Abstract
    This research aims at developing new standardized typologies of semitransparent double skin façades formed by PV laminates in the outer skin. At present there are many [...]

  • W. Castelló, F. Flores
    (2008). Research Report, Nº PI329

    Abstract
    Este informe presenta los avances logrados en la implementación dentro del código Stampack, de un modelo constitutivo elasto-viscoplástico del tipo de [...]

  • C. Estrada, F. Flores
    (2008). Research Report, Nº PI330

    Abstract
    El contenido de este informe semestral es el siguiente. En la Sección 3 se presentan los aspectos básicos de la formulación original del elemento BSQ. [...]

  • X. Oliver
    (2009). Research Report, Nº PI338

  • Z. Tang, J. Périaux, E. Oñate, G. Bugeda
    (2008). Research Report, Nº PI314

    Abstract
    In this paper, the aerodynamic shape optimization problems with uncertain operating conditions have been addressed. After a review of robust control theory and the possible [...]

  • M. Cervera, M. Chiumenti
    (2009). Research Report, Nº PI331

    Abstract
    This paper studies the phenomenon of structural size effect and strain localization in J2 plasticity. Size effect is here understood as the change in the response of a given [...]

  • A. Jarauta, J. Pons Prats
    (2009). Research Report, Nº PI340

  • C. Buachart, E. Ortega, E. Oñate
    (2009). Research Report, Nº PI337

  • J. Rojek, E. Oñate, C. Labra, H. Kazal, J. Akerman
    (2009). Research Report, Nº PI336

    Abstract
    This paper presents an original thermomechanical model of rock cutting with evaluation of tool wear. The model has been developed within the framework of the discrete element [...]

  • K. Lau, R. López, E. Oñate
    (2009). Research Report, Nº PI335

    Abstract
    A neural network noise prediction model for a turbulent boundary layer noise mechanism has been created using a feed forward multilayer perceptron and a noise spectrum database [...]

  • (2009). Research Report, Nº PI333

    Abstract
    A new computational procedure for analysis of the melting and flame spread of polymers under fire conditions is presented. The method, termed Particle Finite Element Method [...]

  • R. Flores, E. Ortega, E. Oñate
    (2009). Research Report, Nº PI334

    Abstract
    This work presents a wing deformation analysis of a twin-sting-mounted commercial aircraft model. Twin-sting arrangements minimize flow disturbances around the model fuselage [...]

  • E. Ortega, R. Flores, E. Oñate
    (2010). Research Report, Nº PI343

    Abstract
    An unsteady low-order panel method for three-dimensional subsonic analyses is presented. The method, which is based on well-established techniques in computational aerodynamics, [...]

  • M. Mier-Torrecilla, S. Idelsohn, E. Oñate
    (2010). Research Report, Nº PI342

    Abstract
    In this work we extend the Particle Finite Element Method (PFEM) to multi-fluid flow problems with the aim of exploiting the fact that Lagrangian methods are specially well [...]

  • (2010). Research Report, Nº PI347

    Abstract
    We present some developments in the formulation of the Particle Finite Element Method (PFEM) for analysis of complex coupled problems on fluid and solid mechanics in engineering [...]

  • (2010). Research Report, Nº PI346

    Abstract
    The so-called zigzag theory has been developed in recent years as an extension of the classical layer-wise theory for modeling composite laminated beams, plates and shells. [...]

  • R. Hernández, A. Larese, E. Oñate
    (2010). Research Report, Nº PI348

    Abstract
    Actualmente las presas de materiales sueltos son la tipología cuya elección es más frecuente debido, en parte, a los grandes avances que se han hecho [...]

  • M. Cervera, M. Chiumenti, D. Di Capua
    (2011). Research Report, Nº PI370

    Abstract
    This paper studies the phenomenon of strain bifurcation and localization in J2 plasticity under plane stress and plane strain conditions. Necessary conditions for the outcome [...]

  • R. Flores, R. Ortega, A. Ilin, D. Simpkins, E. Oñate
    Computational Particle Mechanics (2019). Vol. 6 (2), pp 163–175

    Abstract
    We present a simulation tool for transient events in complex hydraulic networks. The code includes modelling of the transport of suspended cuttings in near-vertical wells. [...]

  • Computational Particle Mechanics (2019). Vol. 6 (4), pp 545–559

    Abstract
    The discrete element method (DEM) is an emerging tool for the calculation of the behaviour of bulk materials. One of the key features of this method is the explicit integration [...]

  • X. Zhang, E. Oñate, S. Galindo, J. Bleyer, K. Krabbenhoft
    Comput. Methods Appl. Mech. Engrg., (2019). Vol. 343, pp. 314-338

    Abstract
    Consequences of submarine landslides include both their direct impact on offshore infrastructure, such as subsea electric cables and gas/oil pipelines, [...]

  • I. Pérez, M. Farias, M. Castro, R. Roselló, C. Morfa, L. Medina, E. Oñate
    Int J Numer Methods Eng. (2019). Vol. 118 (3), pp. 121-131

    Abstract
    A novel algorithm to reproduce the arrangement of grains in polycrystalline materials was recently published by the authors. In this original approach, a dense package of [...]

  • C. Recarey, I. Pérez, R. Roselló, M. Muniz, E. Hernández, R. Giraldo, E. Oñate
    Computer Methods in Applied Mechanics and Engineering (2019). Vol. 345, pp. 336-362

    Abstract
    Several theoretical contributions in order to establish a particle packing methodology are presented. In this respect, a generic formulation of a new method for packing [...]

  • Numerical Analysis of Axisymmetric Solids by the Finite Element Method Use in Concrete, Steel and Mixed Steel-Concrete Elements (2019). 1

  • J. Rojek, E. Oñate, C. Labra, H. Kargl, J. Akerman
    (2010). Technology Innovation in Underground Construction (TUNCONSTRUCT), G. Beer (Ed.)

    Abstract
    This paper presents an original thermomechanical model of rock cutting with evaluation of tool wear. The model has been developed within the framework of the discrete element [...]

  • (2007). Models, Experiments and Computation in Turbulence, R. Castilla, E. Oñate, J. M. Redondo (Eds.), pp. 17-64

    Abstract
    One of the aims of this text is to show some important results in LES modelling and to identify which are main mathematical problems for the development of a complete theory. [...]

  • (1986). Sistemas CAD, CAM, CAE : diseño y fabricación por computador, Boixareu Eds., Barcelona

  • E. Oñate, J. Canet
    (1986). Riesgos Naturales en Ingeniería, E. Alonso et al (Eds.), Ediciones UPC

  • J. Oliver, E. Oñate
    (1984). Flexible Shells, E.L. Axelrad, F.A. Emmerlind (Eds.), Berlín

    Abstract
    The analysis of structures subjected to large displacements by means of the finite element method has attracted the attention of many researchers in recent years and different [...]

  • C. Leal, C. Rodríguez
    (Select a year).

    Abstract
      In this thesis starting from a 7-dimensional metric for the three cases: plane, elliptical and hyperbolic, we obtained the ecs. of Einstein 7-D. Then, solutions [...]

  • E. Oñate, F. Flores
    Computer Methods in Applied Mechanics and Engineering (2005). Vol. 194 (21-24), 2406-2443

    Abstract
    A family of rotation-free three node triangular shell elements is presented. The simplest element of the family is based on an assumed constant curvature field expressed in [...]

  • E. Oñate, J. Miquel, F. Zárate
    Computers and Fluids (2007). Vol. 36 (1), pp. 92-112, 2007

    Abstract
    A stabilized finite element method (FEM) for the multidimensional steady state advection-diffusion-absorption equation is presented. The stabilized formulation is based on [...]

  • E. Oñate, J. Carbonell
    Computational Mechanics (2014). Vol. 54 (6), pp. 1583-1596, 2014

    Abstract
    We present a mixed velocity-pressure finite element formulation for solving the updated Lagrangian equations for quasi and fully incompressible fluids. Details of the governing [...]

  • International Journal of Computational Methods (2004). Vol. 1 (2), pp. 267-307

    Abstract
    We present a general formulation for analysis of fluid-structure interaction problems using the particle finite element method (PFEM). The key feature of the PFEM is the use [...]

  • L. Monforte, M. Arroyo, J. Carbonell, A. Gens
    Monograph CIMNE (2018). M185

    Abstract
    This work develops a numerical technique in which the Particle Finite Element method is applied to simulate solid intrusion problems in Geotechnical Engineering. The work [...]

  • (2002). Análisis y Cálculo de Estructuras de Materiales Compuestos, Oller S. (Ed.), pp. 95-144, CIMNE, Barcelona, Spain

  • F. Cervantes Vallejo, K. Gómez, G. Soto, C. Navarro, H. Mendoza
    Rev. int. métodos numér. cálc. diseño ing. (2019). Vol. 35, (3), 40

    Abstract
    The aim of this work to optimization of the heating system by electrical resistances for a rapid thermal response mold (MRTR), using the response surface methodology (MSR). [...]

  • F. Zárate, J. Hurtado, E. Oñate
    (1999). I. Doltsinis (Ed.), CIMNE, Barcelona, Spain