• Comput. Methods Appl. Mech. Engrg., (1997). Vol. 142 (3-4), pp. 303-334

    Abstract
    In this paper a new frictional time integration algorithm suitable for large slip multibody frictional contact problems is presented. The algorithm is introduced within the [...]

  • R. López, B. Ducoeur, M. Chiumenti, B. Meester, C. Agelet de Saracibar
    Int. J. of Material Forming (2008). Vol. 1, pp. 1291-1294

    Abstract
    This work presents a neural networks approach for finding the effective activation energy and modeling the dissolution rate of hardening precipitates in aluminium alloys using [...]

  • A. Huerta
    (1988). Research Report, Nº PI1

    Abstract
    En este estudio se desarrolla una técnica de elementos finitos basada en una formulación de Petrov-Galerkin y una descripción Arbitrariamente Lagrangiana-Euleriana [...]

  • (1989). Research Report, Nº PI2

    Abstract
    El presente trabajo tiene por objetivo hacer una revisión introductoria sobre el estado actual de los pulvimateriales y en particular sobre los nuevos cerámicos [...]

  • E. Oñate, O. Zienkiewicz, B. Suarez
    (1990). Research Report, Nº PI5

    Abstract
    In this paper the necessary requirements for the good behaviour of shear constrained Reissner–Mindlin plate elements for thick and thin plate situations are re‐interpreted [...]

  • E. Oñate, O. Zienkiewicz
    (1990). Research Report, Nº PI8

    Abstract
    The finite volume method appears to be a particular case of finite elements with a non Galerkin weighting. It is course less accurate for self adjoint problems but has some [...]

  • F. Brueckner
    (1991). Research Report, Nº PI10

    Abstract
    This report outlines the formulation and implementation of the Petrov-Galerkin finite element model under development at The Universe of Arizona into the adaptive computational [...]

  • T. Hughes, E. Oñate, J. Canet
    (1991). Research Report, Nº PI11

    Abstract
    This report presents a method for the solution of two dimensional, potential flow around an aerofoil base on a Finite Element Method for the solution of Laplace’s equation. [...]

  • (1991). Research Report, Nº PI13

    Abstract
    In this paper we present an iterative penalty finite element method for viscous non‐Newtonian creeping flows. The basic idea is solving the equations for the difference [...]

  • E. Oñate, F. Quintana, R. Codina, J. Canet
    (1991). Research Report, Nº PI14

  • (1991). Research Report, Nº PI17

    Abstract
    En este trabajo se presentan las principales características del programa de ordenador “IMPACT 3D” actualmente en desarrollo en el Centro Internacional [...]

  • A. Crescenzo, A. Fusco
    (1993). Research Report, Nº PI36

    Abstract
    The classical incremental theory of plasticity is not able to predict plastic strain accumulation during cycling loading. This because plastic deformation may occur only during [...]

  • G. Bugeda, J. Oliver
    (1992). Research Report, Nº PI19

    Abstract
    The proposed methodology lies on the use of the adaptive mesh remeshing (AMR) technique in the context of 2D shape optimization problems analyzed by the Finite Element Method. [...]

  • (1992). Research Report, Nº PI21

    Abstract
    This paper presents an overview of different computational procedures for finite element analysis of metal forming problems. Both the displacement and flow approaches are [...]

  • (1992). Research Report, Nº PI23

    Abstract
    Se presenta en este trabajo una breve panorámica de diferentes procedimientos para análisis de procesos de conformado de metales por el método de elementos [...]

  • (1993). Research Report, Nº PI41

    Abstract
    This paper shows a generalization of the classic isotropic plasticity theory to be applied to orthotropic or anisotropic materials. This approach assumes the existence of [...]

  • (1993). Research Report, Nº PI27

    Abstract
    Esta publicación explica la utilización de un programa de elementos finitos que permita resolver la ecuación de Poisson transitoria, que rige una gran [...]

  • (1993). Research Report, Nº PI28

    Abstract
    A finite element formulation for solving multidimensional phase-change problems is presented. The formulation considers the temperature as the unique state variable, it is [...]

  • G. Bugeda, E. Oñate, D. Joannas
    (1993). Research Report, Nº PI29

    Abstract
    This work presents a new methodology base on the use adaptive mesh refinement (AMR) techniques in the context of shape optimization problems analyzed by the Finite Element [...]

  • (1993). Research Report, Nº PI31

    Abstract
    This work presents a methodology based on the use of adaptive mesh refinement (AMR) techniques in the context of shape optimization problems analyzed by the Finite Element [...]

  • (1993). Research Report, Nº PI32

    Abstract
    A general methodology for deriving thin plate bending elements with a single degree of freedom per node is presented. The formulation is based on the combination of a standard [...]

  • E. Oñate, F. Zárate, F. Flores
    (1993). Research Report, Nº PI33

    Abstract
    A new plate triangle based on Reissner–Mindlin plate theory is proposed. The element has a standard linear deflection field and an incompatible linear rotation field [...]

  • G. Bugeda, D. Joannas, E. Oñate
    (1993). Research Report, Nº PI34

    Abstract
    L’objet de ce rapport est de presenter l’approche choise par le CIMNE afin d’optimiser des forms, dans le cadre des équations du potentiel incompressible [...]

  • A. Crescenzo, A. Fusco
    (1993). Research Report, Nº PI35

    Abstract
    This work presents the theoretical framework of a new class of constitutive models, which allows to respect five simple physical hypotheses on the mechanical behavior of soils. [...]

  • F. Flores, E. Oñate
    (1993). Research Report, Nº PI38

    Abstract
    En este trabajo se presenta la evaluación de varios elementos basados en la teoría de láminas desarrollada por Simó y colaboradores [1-5]. Se ha [...]

  • F. Flores, E. Oñate
    (1993). Research Report, Nº PI39

    Abstract
    En este trabajo se realiza inicialmente un resumen teórico de las teorías de láminas y vigas desarrolladas por Simo y colaboradores [2-6,12-15]. Luego [...]

  • (1993). Research Report, Nº PI40

    Abstract
    The numerical simulation of hot rolling forming processes is very important for the metallurgic industry. This is an efficient and economic tool to simulate the rolling process [...]

  • J. Heinrich, C. Vionnet
    (1993). Research Report, Nº PI42

    Abstract
    The study of a thin, incompressible Newtonian fluid layer trapped between two almost parallel, sliding surfaces has been actively pursued in the last decades. This subject [...]

  • M. Cervera, R. Codina, J. Galindo
    (1993). Research Report, Nº PI43

    Abstract
    In this paper we outline a general methodology for the solution of the system of algebraic equations arising from the discretization of the field equations governing coupled [...]

  • O. Zienkiewicz, R. Codina
    (1993). Research Report, Nº PI44

    Abstract
    The paper outlines the formulation of a novel algorithm which can be used for the solution of both compressible and incompressible Navier-Stokes or Euler equations. Full incompressibility [...]

  • J. Rodellar, E. Ryan, A. Barbat
    (1994). Research Report, Nº PI45

    Abstract
    A problem of feedback stabilization is addressed for a class of uncertain nonlinear mechanical systems with n degrees of freedom and nc < n control inputs. Each system [...]

  • A. Barbat, J. Rodellar, .. Ryan, N. Molinares
    (1994). Research Report, Nº PI46

    Abstract
    A hybrid seismic control system for buildings structures is considered, which combines a class of passive nonlinear base isolator with an active control system. The active [...]

  • (1994). Research Report, Nº PI47

    Abstract
    Dentro de todos los procesos denominados “Rapid Prototyping”, se presenta en esta publicación el denominado estereolitografía. Estos procesos cuyo [...]

  • (1994). Research Report, Nº PI49

    Abstract
    In this paper the general non symmetric parametric form of the incremental secant stiffness matrix for nonlinear analysis of solids using the finite element method is derived. [...]

  • T. Fischer, J. Canet, O. Fruitos, E. Oñate
    (1994). Research Report, Nº PI50

  • (1994). Research Report, Nº PI53

    Abstract
    This paper describes a number of triangular and quadrilateral plate and Shell elements derived via Reissner-Mindlin plate theory and mixed interpolation. It shown how by introducing [...]

  • S. Idelsohn, J. Heinrich, E. Oñate
    (1994). Research Report, Nº PI51

    Abstract
    A Petrov–Galerkin formulation based on two different perturbations to the weighting functions is presented. These perturbations stabilize the oscillations that are normally [...]

  • A. Barbat, N. Molinares, R. Codina
    (1994). Research Report, Nº PI52

    Abstract
    Base insolation systems partially uncoupled a structure from the seismic ground motion by means of specially designed, replaceable, devices inserted between the structure [...]

  • M. Cervera, J. Oliver, M. Galindo
    (1994). Research Report, Nº PI54

    Abstract
    In this paper a general methodology for the analysis of large concrete dams subjected to seismic excitation is outlined. It is valid both for gravity dams (2D representation) [...]

  • A. Barbat
    (1994). Research Report, Nº PI55

  • G. Pijaudier-Cabot, L. Bodé, A. Huerta
    (1994). Research Report, Nº PI56

    Abstract
    Nonlocal models guaranty that finite element computations on strain materials remain sound up to failure from a theoretical and computational viewpoint. The non-locality prevents [...]

  • R. Codina, O. Soto
    (1994). Research Report, Nº PI58

    Abstract
    The objective of this paper is to present a finite element formulation to solve the Stokes problem with Coriolis force. This force results in a skew-symmetric term in the [...]

  • T. Fischer, E. Oñate
    (1995). Research Report, Nº PI60

    Abstract
    This report documents the potential capabilities of adaptive inviscid flow calculations on unstructured meshes in three dimensions using the finite element method. The finite [...]

  • J. Blasco, R. Codina, A. Huerta
    (1995). Research Report, Nº PI63

    Abstract
    An implicit fractional-step method for the numerical solution of the time-dependent incompressible Naiver-Stokes equations in primitive variables is developed and studied [...]

  • R. Codina, J. Blasco
    (1995). Research Report, Nº PI66

    Abstract
    In this paper we study a variational formulation of the Stokes problem that accommodates the use of equal velocity-pressure finite element interpolations. The motivation of [...]

  • E. Oñate, S. Idelsohn, O. Zienkiewicz
    (1995). Research Report, Nº PI67

  • (1995). Research Report, Nº PI68

    Abstract
    Over the last few years a remarkable progress has been achieved in the field of computational contact mechanics. The formulation by means of variational inequalities, as [...]

  • (1995). Research Report, Nº PI69

    Abstract
    In this paper a new frictional time integration algorithm suitable for large slip multibody frictional contact problems is presented. The algorithm is introduced within the [...]

  • (1995). Research Report, Nº PI70

    Abstract
    In this paper a numerical model for the analysis of multi-body frictional wear contact problems at finite deformations is presented. Wear phenomena are analysed and the main [...]

  • J. Rojek, E. Oñate, J. Canet
    (1995). Research Report, Nº PI71

    Abstract
    En este trabajo se presentan las principales características del programa de ordenador “SIMPACT” desarrollado en el Centro Internacional de Métodos [...]

  • (1996). Research Report, Nº PI81

    Abstract
    The concept of the so called “artificial or balancing diffusion” used to stabilize the numerical solution of advective diffusive transport and fluid flow [...]

  • A. Rodríguez-Ferran, A. Huerta
    (1996). Research Report, Nº PI91

    Abstract
    Two algorithms for the stress update (i.e., time-integration of the constitutive equation) in large strain solid mechanics are discussed, with particular emphasis on two issues: [...]

  • J. García-Espinosa, L. Rojas, J. Cabezas, J. Alonso
    (1998). Research Report, Nº PI140

    Abstract
    The BAJEL project consists on the validation and final development of a comprehensive computer system to support the hydrodynamic design of ships. It aims at contributing to [...]

  • (1999). Research Report, Nº PI153

    Abstract
    The paper presents an up‐to‐date finite element numerical model for fully coupled thermo‐mechanical problems, focussing in the simulation of solidification processes [...]

  • R. Taylor, O. Zienkiewicz, E. Oñate
    (1995). Research Report, Nº PI74

  • M. Cervera, J. Oliver, O. Manzoli
    (1995). Research Report, Nº PI76

    Abstract
    In this paper a rate‐dependent isotropic damage model developed for the numerical analysis of concrete dams subjected to seismic excitation is presented. The model is shown [...]

  • A. Barbat, S. Oller, E. Oñate, A. Hanganu
    (1995). Research Report, Nº PI77

    Abstract
    A local damage constitutive model based on Kachanov’s theory is used within a finite element frame and applied to the case of 2D and 3D Timoshenko beam elements. The [...]

  • J. Hurtado, A. Barbat
    (1995). Research Report, Nº PI79

    Abstract
    A method for predicting the seismic energy input spectrum is presented. The method is based on the analytical relationship linking this spectrum and other measures of earthquake [...]

  • (1996). Research Report, Nº PI101

    Abstract
    In this paper we describe several finite element methods for solving the diffusion-convection-reaction equation. None of them is new, although the presentation is non-standard [...]

  • R. Codina, M. Vázquez, O. Zienkiewicz
    (1997). Research Report, Nº PI118

    Abstract
    In this paper we present a summary of the splitting technique for both compressible and incompressible flows previously proposed in [22, 23, 7]. Also, we extend it to the [...]

  • (1997). Research Report, Nº PI126

    Abstract
    A stabilized finite element method for solving systems of convection-diffusion-reaction equations is studied in this paper. The method is based on the subgrid scale approach [...]

  • A. Huerta, P. Díez
    (1998). Research Report, Nº PI132

    Abstract
    The present paper proposes a new technique for the definition of the shape design variables in 2D and 3D optimisation problems. It can be applied to the discrete model of [...]

  • J. Donea, B. Roig, A. Huerta
    (1998). Research Report, Nº PI135

    Abstract
    A major objective of the study described in the present paper is to achieve a high accuracy in the time integration of transient convection-diffusion problems and to eventually [...]

  • A. Huerta, A. Rodríguez-Ferran, P. Díez
    (1998). Research Report, Nº PI136

    Abstract
    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 errors [...]

  • J. Sarrate, A. Huerta, J. Donea
    (1998). Research Report, Nº PI137

    Abstract
    A new formulation for two-dimensional fluid-rigid body interaction problems is developed. In particular, vortex-induced oscillations of a rigid boy in viscous incompressible [...]

  • E. Car, S. Oller, E. Oñate
    (1998). Research Report, Nº PI139

    Abstract
    En este trabajo se presenta un modelo constitutivo elastoplástico anisótropo generalizado en deformaciones finitas para el análisis de materiales compuestos [...]

  • D. Vives
    (1998). Research Report, Nº PI141

    Abstract
    La principal ventaja del método de los elementos finitos y del método de los volúmenes finitos es la capacidad que tienen de tratar con dominios ciertamente [...]

  • (1998). Research Report, Nº PI143

    Abstract
    In this work the formulation of a general elasto-viscoplastic constitutive model is consistently derived within a thermodynamic framework. The constitutive behavior has been [...]

  • G. Chiandussi, G. Bugeda, E. Oñate
    (1998). Research Report, Nº PI144

    Abstract
    A simple method to automatically update the finite element mesh of the analysis domain is proposed. The method considers the mesh as a fictitious elastic body subjected to [...]

  • M. Cervera, J. Oliver, T. Prato
    (1998). Research Report, Nº PI146

    Abstract
    In this work a coupled thermo-chemo-mechanical model for the behavior of concrete at early ages is proposed. The model allows simulation of the observed phenomena of hydration, [...]

  • G. Chiandussi, G. Bugeda, E. Oñate
    (1998). Research Report, Nº PI147

    Abstract
    A simple method to automatically update the finite element mesh of the analysis domain is proposed. The method considers the mesh as a fictitious elastic body subjected to [...]

  • (1999). Research Report, Nº PI148

    Abstract
    In this paper we describe a finite element formulation for the numerical solution of the stationary Navier-Stokes equations including Coriolis forces and the permeability [...]

  • E. Oñate, F. Zárate
    (1999). Research Report, Nº PI149

    Abstract
    The paper describes how the finite element method and the finite volume method can be successfully combined to derive two new families of thin plate and shell triangles with [...]

  • (1999). Research Report, Nº PI150

    Abstract
    A stabilized finite element formulation for incompressible viscous flows is derived. The starting point are the modified Navier-Stokes equations incorporating naturally the [...]

  • A. Pérez-Foguet, A. Rodríguez-Ferran, A. Huerta
    (1999). Research Report, Nº PI151

    Abstract
    In Reference the authors have shown that numerical differentiation is a competitive alternative to analytical derivatives for the computation of consistent tangent matrices. [...]

  • (1999). Research Report, Nº PI154

    Abstract
    The paper presents an overview of some recent developments in computational mechanics introducing new degrees of “freedom” allowing the solution of more challenging [...]

  • S. Robles, F. Zárate
    (1999). Research Report, Nº PI161

  • (1999). Research Report, Nº PI156

    Abstract
    The objective of this paper is twofold. First, a stabilized finite element method for the incompressible Navier-Stokes is presented, and several numerical experiments are [...]

  • M. Cervera, J. Oliver, T. Prato
    (1999). Research Report, Nº PI157

    Abstract
    In this work a numerical procedure for the simulation of the construction process of Roller Compacted Concrete (RCC) dams is described. The basis of the work is a coupled [...]

  • (1999). Research Report, Nº PI158

    Abstract
    This is the user’s guide for the BLAY3D code (version 2.2 of December 28, 1998). BLAY3D is a fluid mechanics code for solving the incompressible Boundary Layer Equations [...]

  • (1999). Research Report, Nº PI162

    Abstract
    Two apparently different forms of dealing with the numerical instability due to the incompressibility constraint of the stokes problem are analyzed in this paper. The first [...]

  • (1999). Research Report, Nº PI163

    Abstract
    This paper deals with a thermodynamically consistent numerical formulation for coupled thermoplastic problems including phase-change phenomena and frictional contact. The [...]

  • (1999). Research Report, Nº PI164

    Abstract
    The basis of the finite point method for the fully meshless solution of structure mechanics problems is described. A new stabilization technique based on a finite increment [...]

  • (1999). Research Report, Nº PI166

    Abstract
    A stabilized semi-implicit frictional step finite element method for solving coupled fluid-structure interaction problems involving free surface waves is presented. The stabilized [...]

  • (1999). Research Report, Nº PI167

    Abstract
    A stabilized finite point method (FPM) for meshless analysis of incompressible fluid flow problems is presented. The stabilization approach is based in the finite increment [...]

  • E. Oñate, F. Zárate, X. Plana, L. Neamtu
    (1999). Research Report, Nº PI168

    Abstract
    A new three node shell triangular element with translational degree of freedom as the only modal variables is presented. The element formulation is based on combining a standard [...]

  • (1999). Research Report, Nº PI169

    Abstract
    El trabajo muestra que los términos de estabilización para la solución por el MEF de problemas de transporte convectivo y de flujo incompresible, pueden [...]

  • M. Cervera, R. Faria, J. Oliver, T. Prato
    (1999). Research Report, Nº PI170

    Abstract
    A macroscopic model to account for the hydration and aging phenomena that occur during the early ages of concrete is proposed in this work. Assuming the percolation of water [...]

  • A. Huerta, S. Fernández-Méndez
    (1999). Research Report, Nº PI171

    Abstract
    A mixed hierarchical approximation based on finite elements and meshless methods is presented. Two cases are considered. The first one couples regions where finite elements [...]

  • J. Sarrate, A. Huerta
    (1999). Research Report, Nº PI172

    Abstract
    This work devoted to the description of an algorithm for automatic quadrilateral mesh generation. The technique is based on a recursive decomposition of the domain into quadrilateral [...]

  • J. Sarrate, A. Huerta
    (1999). Research Report, Nº PI173

    Abstract
    In the generation of quadrilateral unstructured meshes, special attention is focused to the shape of the elements. This is because it is well known that the distortion of [...]

  • P. Díez, J. Egozcue
    (1999). Research Report, Nº PI175

  • J. Mora, J. Canet, E. Oñate, C. Sacco, L. Martínez
    (1999). Research Report, Nº PI177

    Abstract
    La sencillez conceptual de la electrostática esconde todo un abanico de aplicaciones industriales que precisa de herramientas de cálculo numérico para [...]

  • (1999). Research Report, Nº PI178

    Abstract
    In this work a generalized anisotropic elastoplastic constitutive model in large deformation is presented. It is used for the analysis of fiber-reinforced composite [...]

  • R. Codina, C. Morton, E. Oñate, O. Soto
    (1999). Research Report, Nº PI181

    Abstract
    Presents a numerical strategy for the aerodynamic analysis of large buildings, with an application to the simulation of the air flow within a telescope building. The finite [...]

  • (2000). Research Report, Nº PI180

    Abstract
    A stabilized semi-implicit step finite element method for solving coupled fluid-structure interaction problems involving free surface waves is presented. The stabilized governing [...]

  • E. Oñate, M. Manzan
    (2000). Research Report, Nº PI183

    Abstract
    The accurate solution of convection type problems on practical grids has been ever a challenging issue, and invariably some sort of stabilization is needed in order to get [...]

  • J. Hurtado, F. Zárate, E. Oñate
    (2000). Research Report, Nº PI184

    Abstract
    Stochastic Mechanics is a rapidly growing area of research, whose importance is being recognized not only in academic circles but also in industrial practice. This is no doubt [...]

  • A. Rodríguez-Ferran, I. Morata, A. Huerta
    (2003). Research Report, Nº PI231

    Abstract
    We present an efficient and reliable approach for the numerical modelling of failure with nonlocal damage models. The two major numerical challenges – the strongly nonlinear, [...]

  • (2000). Research Report, Nº PI185

    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 [...]

  • (2000). Research Report, Nº PI186

    Abstract
    The objective of this paper is to analyze the pressure stability of fractional step finite element methods for incompressible flows. For the classical first order projection [...]

  • (2000). Research Report, Nº PI187

    Abstract
    We discuss in this paper some implementation aspects of a finite element formulation for the incompressible Navier-Stokes which allows the use of equal order velocity-pressure [...]

  • E. Oñate, A. Hanganu, J. Canet
    (2000). Research Report, Nº PI188

    Abstract
    The paper describes a finite element damage model for non linear analysis of concrete or reinforced structures. It is show how can be effectively used to predict local and [...]

  • R. Taylor
    (2000). Research Report, Nº PI189

    Abstract
    This paper addresses the coupled flexible and rigid body response of solids undergoing large motions and deformations. The formulation is presented in a form which is free [...]

  • A. Huerta, S. Fernández-Méndez
    (2000). Research Report, Nº PI190

    Abstract
    Volumetric locking (locking in the incompressible limit) for linear elastic isotropic materials is studied in the context of the Element Free Galerkin method. The modal analysis [...]

  • (2000). Research Report, Nº PI191

    Abstract
    Se plantean en el artículo los límites de los métodos numéricos para resolver cualquier problema que afecte a la vida del hombre. Se discute la [...]

  • (2000). Research Report, Nº PI192

    Abstract
    El artículo presenta una sucinta panorámica sobre la evolución de los métodos numéricos dese la antigua Babilonia hasta nuestros días. [...]

  • E. Oñate, A. Hanganu, J. Miquel, B. Suárez
    (2000). Research Report, Nº PI193

    Abstract
    Se presenta el concepto de Laboratorio Virtual de Estructuras (LAVE) para evaluar por ordenador la capacidad resistente de estructuras de hormigón y el coeficiente [...]

  • (2000). Research Report, Nº PI194

  • (2000). Research Report, Nº PI195

  • (2000). Research Report, Nº PI196

    Abstract
    A stabilized finite point method (FPM) for meshless analysis of incompressible fluid flows is presented. The stabilization approach is based in the finite calculus (FIC) procedure. [...]

  • (2000). Research Report, Nº PI197

    Abstract
    In this paper we present a stabilized finite element method to solve the transient Navier-Stokes equations based on the decomposition of the unknowns into resolvable and sub [...]

  • R. Faria, J. Oliver, M. Cervera
    (2000). Research Report, Nº PI198

    Abstract
    Within the framework of Continuum Damage Mechanics some isotropic scalar damage models for concrete are revisited, with emphasis on a recent one proposed by the authors. This [...]

  • J. Maristany, F. Salinas, A. Mestre
    (2000). Research Report, Nº PI199

  • (2000). Research Report, Nº PI201

    Abstract
    El artículo es una panorámica de los aspectos teóricos y algunas aplicaciones prácticas de los modelos de fractura desarrollados por diversos grupos [...]

  • (2001). Research Report, Nº PI202

    Abstract
    The basis of the finite point method (FPM) for the fully meshless solution of elasticity problems in structural mechanics is described. A stabilization [...]

  • R. Taylor
    (2001). Research Report, Nº PI203

    Abstract
    This report summarizes the formulation for a large displacement formulation of a membrance composed of three-node triangular elements. A formulation in terms of the deformation [...]

  • O. Zienkiewicz, R. Taylor
    (2001). Research Report, Nº PI204

    Abstract
    Discontinuous Galerkin methods have received considerable attention in recent years for applications to many problems in which convection and diffusion terms are present. [...]

  • (2001). Research Report, Nº PI205

    Abstract
    The expression ‘finite calculus’ refers to the derivation of the governing differential equations in mechanics by invoking balance of fluxes, forces, etc. in a [...]

  • A. Hanganu, E. Oñate, A. Barbat
    (2001). Research Report, Nº PI206

    Abstract
    The paper introduces a new global damage evaluation method, thus obtaining a meaningful global damage index (GDI). A numerical procedure for predicting a local and global [...]

  • (2001). Research Report, Nº PI207

    Abstract
    Se presentan en el artículo las ideas básicas de qué son los métodos numéricos, cuáles son los métodos numéricos más [...]

  • (2001). Research Report, Nº PI208

    Abstract
    A stabilized semi-implicit fractional step finite element method for solving coupled fluid-structure interaction problems involving free surface waves is presented. The stabilized [...]

  • P. Díez, N. Parés, A. Huerta
    (2001). Research Report, Nº PI209

    Abstract
    Classical Residual type error estimators approximate the error flux around the elements and yield upper bounds of the exact (or references) error. Lower bounds of the error [...]

  • R. Löhner
    (2002). Research Report, Nº PI210

    Abstract
    Recent advances in mesh and point generation are reviewed. These include: meshing of discrete surfaces, parallel advancing front methods, improvements in RAMS gridding via [...]

  • J. Olausson, J. Gustafsson, D. Capua, E. Oñate
    (2002). Research Report, Nº PI211

    Abstract
    This study thoroughly explains the process of implementing Adaptive Mesh Refinement into a Finite Element Analysis program. Using the error norm, a routine for improving an [...]

  • (2002). Research Report, Nº PI212

    Abstract
     La utilización de materiales compuestos laminados en estructuras es creciente en todos los ámbitos de la ingeniería. El cálculo de esas estructuras [...]

  • M. Soboleosky, G. Bugeda, S. Oller
    (2002). Research Report, Nº PI213

    Abstract
    El presente apunte tiene como meta mostrar, de manera sencilla y conceptual, los objetivos y procedimientos de la optimización orientada a la ingeniería. Es [...]

  • C. Felippa, E. Oñate
    (2002). Research Report, Nº PI216

    Abstract
    We study three “incompressibility flavors” of linearly-elastic anisotropic solids that exhibit volumetric constraints: isochoric, hydroisochoric and rigidtropic. [...]

  • C. Felippa, E. Oñate
    (2002). Research Report, Nº PI217

    Abstract
    We define stress and strain splittings appropriate to linearly elastic anisotropic materials with volumetric constraints. The treatment includes rigidtropic materials, [...]

  • C. Felippa
    (2002). Research Report, Nº PI218

    Abstract
    This article compares derivation methods for constructing optimal membrane triangles with corner drilling freedoms. The term “optimal” is used in the sense of [...]

  • C. Felippa
    (2002). Research Report, Nº PI219

    Abstract
    The article has a dual historical and educational theme. It is a tutorial on finite elements templates for two-dimensional structural problems. The exposition focused on the [...]

  • E. Oñate, J. Marcipar, F. Zárate
    (2003). Research Report, Nº PI221

    Abstract
    Se presenta una breve panorámica de las posibilidades de las nuevas Tecnologías de la Información y las Comunicaciones en el sector de la construcción. [...]

  • (2003). Research Report, Nº PI222

    Abstract
    This chapter presents an overview of some computational methods for analysis of ship hydrodynamics problems. Attention is focused on the description of a stabilized finite [...]

  • (2003). Research Report, Nº PI223

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

  • G. Houzeaux, R. Codina
    (2003). Research Report, Nº PI224

    Abstract
    We present in this paper a complete numerical strategy for the study of two gear pumps. This work includes all the steps to follow from the treatment of the CAD geometry until [...]

  • (2003). Research Report, Nº PI227

    Abstract
    This paper exploits the concept of stabilization techniques to improve the behaviour of mixed linear/linear simplicial elements (triangles and tetrahedra) in incompressible [...]

  • R. Silva, F. Zárate, S. Idelsohn
    (2003). Research Report, Nº PI228

    Abstract
    La presente Tesis de Master tiene como objetivo la modificación del programa CALTEP2000 estacionario, el cual estudia la transmisión de calor mediante el Método [...]

  • H. Kwak, E. Oñate, S. Kim
    (2003). Research Report, Nº PI229

    Abstract
    Nonlinear dynamic analysis of a reinforced concrete (RC) frame under earthquake loading is performed in this paper on the basis of a hysteretic moment-curvature relation. [...]

  • A. Rodríguez-Ferran, J. Sarrate, A. Huerta
    (2003). Research Report, Nº PI230

    Abstract
    Numerical modelling of porous flow in a low-permeability with high-permeability inclusions is a challenging task, because the large ratio of permeabilities ill-conditions [...]

  • A. Huerta, Y. Vidal, P. Villon
    (2003). Research Report, Nº PI232

    Abstract
    Incompressible modelling in finite elements has been a major concern since its early developments and has been extensively studied. However, incompressibility in mesh-free [...]

  • Y. Vidal, P. Villon, A. Huerta
    (2003). Research Report, Nº PI233

    Abstract
    Locking in finite elements has been a major concern since its early developments. It appears because poor numerical interpolation leads to an over-constrained system. This [...]

  • P. Díez, I. Morata, A. Huerta
    (2003). Research Report, Nº PI234

    Abstract
    The reliable computation of shell structures requires a tool to assess and control the quality of the finite element solution. For practical purposes, the quality of the numerical [...]

  • A. Huerta, S. Fernández-Méndez, W. Liu
    (2003). Research Report, Nº PI235

    Abstract
    Mesh-free methods have since their early developments been blended to the finite element formulation in order to benefit from the advantages of both numerical techniques. [...]

  • S. Fernández-Méndez, A. Huerta
    (2003). Research Report, Nº PI236

    Abstract
    Imposing essential boundary is a key issue in mesh-free methods. The mesh-free interpolation does not verify the Kronocker delta property and, therefore, the imposition of [...]

  • C. Felippa, E. Oñate
    (2003). Research Report, Nº PI237

    Abstract
    This article presents the first application of the Finite Calculus (FIC) in a Ritz-FEM variational framework. FIC provides a steplength parametrization of mesh dimensions, [...]

  • (2003). Research Report, Nº PI239

    Abstract
    A finite calculus formulation of the level set equation is presented. Quadratic Galerkin finite elements are used for spatial discretization. A unique stabilization parameter [...]

  • G. Houzeaux, R. Codina
    (2003). Research Report, Nº PI242

    Abstract
    In this paper, we present a numerical model to simulate lost foam casting processes. We first introduce this particular casting in order to catch the different physical processes [...]

  • S. Fernández-Méndez, A. Huerta
    (2003). Research Report, Nº PI236

    Abstract
    Imposing essential boundary conditions is a key issue in mesh-free methods. The mesh-free interpolation does not verify the Kronecker delta property and, therefore, the imposition [...]

  • J. Rojek, M. Luege, E. Oñate
    (2004). Research Report, Nº PI265

    Abstract
    This report present 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 PI263

    Abstract
    This paper sets out to study the impact that market risk limits have on the price dynamics in securities markets. We start out from a standard model in which trading patterns [...]

  • 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 [...]

  • (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 [...]

  • (2004). Research Report, Nº PI259

    Abstract
    En este trabajo se estudia los algoritmos de integración en el tiempo que se basan en el método α generalizado. Para realizar dicho estudio se adoptan [...]

  • 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  [...]

  • 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. [...]

  • 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 [...]

  • 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 [...]

  • 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 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 [...]

  • Research Report (2017). PI417

    Abstract
    We present an overview of the model implemented by the International Centre for Numerical Methods in Engineering (CIMNE, www.cimne.com ) for  the generation of scientific [...]

  • B. Movahedian, B. Boroomand
    (2011). Research Report, Nº PI364

    Abstract
    In this research we present a method based on using Exponential Basis Functions (EBFs) to solve a class of time dependent engineering problems. The solution is first approximated [...]

  • S. Zandi, B. Boroomand, S. Soghrati
    (2011). Research Report, Nº PI363

    Abstract
    In this report, a new simple meshless method is presented for the solution of incompressible inviscid fluid flow problems with moving boundaries. A Lagrangian formulation [...]

  • W. Castelló, F. Flores
    (2011). Research Report, Nº PI362

    Abstract
    El objetivo principal del presente informe es mostrar las mejoras en la performance del código Stampack, cuando se lo emplea en conjunto con OpenMP en máquinas [...]

  • M. Pasenau, C. Andújar
    (2011). Research Report, Nº PI361

    Abstract
    El objetivo principal del proyecto de fin de carrera es el análisis, diseño, implementación y prueba de un algoritmo que permita simplificar rápidamente [...]

  • (2011). Research Report, Nº PI357

    Abstract
    We present some developments in the Particle Finite Element Method (PFEM) for analysis of complex coupled problems in mechanics involving fluid-soil-structure interaction [...]

  • E. Oñate
    (2011). Research Report, Nº PI354

    Abstract
    Cuando se habla de la investigación, el desarrollo tecnológico y la innovación (I+D+I en siglas, que yo escribo todas en mayúsculas [1]) es frecuente [...]

  • M. Shahbazi, B. Boroomand, S. Soghrati
    (2011). Research Report, Nº PI353

    Abstract
    In this report, we introduce a meshfree approach for static analysis of isotropic/orthotropic crossply laminated plates with symmetric/non-symmetric layers. Classical, first [...]

  • R. Flores, E. Ortega, R. López
    (2012). Research Report, Nº PI375

    Abstract
    This work, conducted at CIMNE under ALEF project task 1.2.3, presents an investigation about the potential capabilities of neural networks to assist simulation campaigns. [...]

  • A. Eijo, E. Oñate, S. Oller
    (2012). Research Report, Nº PI378

    Abstract
    A new bilinear 4-noded quadrilateral element (called QLRZ) for the analysis of composite laminated and sandwich plates/shells based on the refined zigzag theory (RZT) proposed [...]

  • C. Estruch, B. Suárez, J. Marcipar
    (2012). Research Report, Nº PI380

    Abstract
    Actualmente el espacio formado por el “Parc Mediterrani de la Tecnologia” y el Campus Universitario de la Universitat Politècnica de Catalunya (PMT-UPC) [...]

  • M. Santasusana, E. Oñate
    (2012). Research Report, Nº PI381

    Abstract
    The Discrete Element Method is a relatively new technique that has nowadays and intense research in the field of numerical methods. In its first conception, the method was [...]

  • D. Modesto, S. Zlotnik, A. Huerta
    (2013). Research Report, Nº PI401

    Abstract
    Solving the Helmholtz equation for a large number of input data in an heterogeneous media and unbounded domain still represents a challenge. This is due to the particular [...]

  • A. Llanos, E. Oñate, F. Zárate
    (2013). Research Report, Nº PI398

    Abstract
    Actualmente existen programas de MAT-fem para calcular vigas de material homogéneo, según la teoría de Euler-Bernoulli o de Timoshenko. El objetivo de [...]

  • P. Nadukandi
    (2014). Research Report, Nº PI408

    Abstract
    We present numerically stable formulas for the analytical solution in the closed form of the so-called X-IVAS scheme in 3D. The X-IVAS scheme is a material point based [...]

  • E. Ortega, R. Flores
    (2016). Research Report, Nº PI415

    Abstract
    PARACHUTES is a computer program developed at the International Center for Numerical Methods in Engineering (CIMNE) for the simulation of ram-air (gliding) parachute systems. The [...]

  • (2011). Research Report, Nº PI359

    Abstract
    Se presentan unas reflexiones sobre el ciclo que las ideas recorren desde que surgen en un entorno universitario hasta que se transforman en un producto industrial. Se concretan [...]

  • B. Boroomand, B. Khalilian
    (2004). Research Report, Nº PI248

    Abstract
    In this paper a simple iterative method is presented for finite element solution of incompressible plane strain problems using linear elements. Instead of using a mixed formulation [...]

  • B. Boroomand, M. Ghaffarian, O. Zienkiewicz
    (2004). Research Report, Nº PI247

    Abstract
    In this paper a study is performed on application of two recovery methods, i.e. Superconvergent Patch Recovery (SPR) and the Recovery by Equilibrium of Patches (REP), to plate [...]

  • B. Boroomand, A. Tabatabaie, E. Oñate
    (2004). Research Report, Nº PI249

    Abstract
    A stabilized version of the Finite Point Method (FPM) is presented. A source of instability due to the evaluation of the base function using a least square procedure is discussed. [...]

  • B. Boroomand, F. Mossaiby
    (2004). Research Report, Nº PI250

    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. Valdés
    (2004). Research Report, Nº PI266

    Abstract
    Avances en el análisis mediante elementos finitos de membranas curvas con ''wrinkling''  sujetas a grandes desplazamientos son presentados. Este [...]

  • E. Ortega, R. Flores, E. Oñate, C. Sacco, E. González
    (2010). Research Report, Nº PI341

    Abstract
    The design and evaluation of parachute-payload systems is an important field of applications in which numerical analysis tools can make very important contributions. This [...]

  • E. Oñate, B. Suárez, F. Salazar, R. Morán, M. Celigueta, S. Latorre
    (2011). Research Report, Nº PI365

    Abstract
    Se describen los conceptos básicos del método de partículas y elementos finitos (PFEM) para análisis de flujos de fluidos en lámina libre [...]

  • E. Ortega, E. Oñate, S. Idelsohn
    (2011). Research Report, Nº PI368

    Abstract
    An adaptive Finite Point Method (FPM) for solving aeroelastic compressible flow problems is presented. The numerical methodology is based on a meshless upwind-biased discretization [...]

  • E. Oñate, S. Idelsohn, F. Pin, R. Aubry
    (2004). Research Report, Nº PI243

    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 [...]

  • E. Oñate, J. Marcipar, J. Piazzese
    (2003). Research Report, Nº PI238

    Abstract
    La eclosión de las Tecnologías de la Información y las Comunicaciones (TIC), y en particular de Internet, ha facilitado el desarrollo de sistemas que, [...]

  • H. Koszur
    (2015). Research Report, Nº PI412

    Abstract
    The main objective of this document is to present an idea of calibration tests used to improve an input material model in the DEM simulations in the D-DEMPack package programme [...]

  • E. Oñate, F. Flores
    (2003). Research Report, Nº PI241

    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. Carbonell
    (2013). Research Report, Nº PI393

    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 [...]

  • E. Oñate, J. Miquel, F. Zárate
    (2005). Research Report, Nº PI269

    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, M. Celigueta, S. Latorre, G. Casas, R. Rossi, J. Rojek
    (2014). Research Report, Nº PI405

    Abstract
    We present a Lagrangian numerical technique for the analysis of flows incorporating physical particles of different sizes. The numerical approach is based on the Particle [...]

  • M. Font, E. Oñate, J. Carbonell
    (2011). Research Report, Nº PI366

    Abstract
    El deflectòmetre d’impacte segurament és l’aparell més utilitzat per realitzar assaigs no destructius dels ferms. Els enginyers utilitzen [...]

  • J. Mora, R. Otín, P. Dadvand, E. Escolano, M. Pasenau, E. Oñate
    (2005). Research Report, Nº PI273

    Abstract
    Computational electromagnetism requires a wide range of numerical methods depending on the application, the topology of the geometry, the frequency and the quality of the [...]

  • E. Oñate, A. Franci, J. Carbonell
    (2014). Research Report, Nº PI406

    Abstract
    We present a generalized Lagrangian formulation for analysis of industrial forming processes involving thermally coupled interactions between deformable continua. The governing [...]

  • E. Oñate, M. Celigueta, S. Idelsohn, F. Salazar, A. Larese, R. Rossi, B. Suárez,