• Metals (2019). Vol. 9 (5), pp. 573

    Abstract
    The computational modeling and numerical simulation of Friction Stir Welding (FSW) processes is an extremely challenging task due to the highly nonlinear and coupled nature [...]

  • Int. J. Numer. Meth. Engng. (2017). (preprint) Vol. 113 (6), pp. 910-937

    Abstract
    In this paper, conserving time‐stepping algorithms for frictionless and full stick friction dynamic contact problems are presented. Time integration algorithms for frictionless [...]

  • G. Schmitz, A. Engstrom, R. Bernhardt, U. Prahl, L. Adam, J. Seyfarth, M. Apel, C. Agelet de Saracibar, P. Korzhavyi, J. Agren, B. Patzak
    Journal of The Minerals, Metals & Materials Society (2016). Vol. 68 (1), pp. 70-76

    Abstract
    The Integrated Computational Materials Engineering expert group (ICMEg), a coordination activity of the European Commission, aims at developing a global and open standard [...]

  • Finite Elements in Analysis and Design (2015). (preprint) Vol. 93 (1), pp. 107-125

    Abstract
    This paper deals with the computational modeling and numerical simulation of contact problems at finite deformations using the finite element method. Quasi-static and dynamic [...]

  • J. Rojek, F. Zárate, C. Agelet de Saracibar, C. Gilbourne, P. Verdot
    Int. J. Numer. Meth. Engng. (2004). Vol. 62 (11), pp. 1241-1441

    Abstract
    This paper presents a numerical model of mould manufacture for the lost foam casting process. The process of mould filling with sand and sand compaction by vibration are modelled [...]

  • Instituto de Recursos Energéticos's personal collection (2019). 1

    Abstract
    A partir de la formación de un Mercado Mayorista de Electricidad en Guatemala, que promueve la competencia en la generación, se inicia el crecimiento y la diversificación [...]

  • Archives of Comp. Meths. Engng. (1998). Vol. 5 (3), pp. 243-301

    Abstract
    In this paper a numerical model for the analysis of coupled thermomechanical multi-body frictional contact problems at finite deformations is presented. The multi-body frictional [...]

  • 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 [...]

  • S. Benítez, M. Chiumenti, F. Sepulcre, I. Achaerandio, M. Pujolá
    Journal of Food Engineering (2012). Vol. 113 (4), pp. 527-533

    Abstract
    The effect of temperature on the respiration rate and texture of fresh cut pineapple was studied over the course of 10 days of storage. The thermal exchange between 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 [...]

  • Comput. Methods Appl. Mech. Engrg., (2004). Vol. 193 (9-11), pp. 849-880

    Abstract
    This paper describes a novel formulation for the solution of problems involving shear band localization using a local isotropic J2 continuum damage model and mixed linear [...]

  • Comput. Methods Appl. Mech. Engrg., (1999). Vol. 177 (3-4), pp. 401-426

    Abstract
    The evolution of the contact surfaces wear may become particularly important in the definition of the frictional behavior, in particular for frictional contact problems involving [...]

  • 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
    (1990). 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 [...]

  • 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. [...]

  • 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 [...]

  • 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 [...]

  • Collection of Articles on Computer Science (2019). 1

    Abstract
    Fog computing provides reliable computing, customized and by guarantee dynamic environments for the end-users, so that more and more people tend to use fog environments every [...]

  • 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

  • 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 [...]

  • (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 [...]

  • 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 [...]

  • 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 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: [...]

  • (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. Diez
    (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 [...]

  • 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 [...]

  • 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 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 [...]

  • (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 [...]

  • (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 [...]

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

  • (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 [...]