JOURNALS

Documents published in Scipedia

• Advanced solid elements for sheet metal forming simulation

  V. Mataix Ferrándiz, R. Rossi, E. Oñate, F. flores

  (2016). Journal of Physics: Conferences Series, Cesar de Sa J. M. A., Neto E. S., Cardoso R. P. R., Adetoro O. B. (eds), Vol. 734 (3), pp. 032128

  
  

  Abstract

  The solid-shells are an attractive kind of element for the simulation of forming processes, due to the fact that any kind of generic 3D constitutive law can be employed without any additional hypothesis. The present work consists in the improvement of a triangular prism solid-shell originally developed by Flores. The solid-shell can be used in the analysis of thin/thick shell, undergoing large deformations. The element is formulated in total Lagrangian formulation, and employs the neighbour (adjacent) elements to perform a local patch to enrich the displacement field. In the original formulation a modified right Cauchy-Green deformation tensor (C) is obtained; in the present work a modified deformation gradient (F) is obtained, which allows to generalise the methodology and allows to employ the Pull-Back and Push-Forwards operations. The element is based in three modifications: (a) a classical assumed strain approach for transverse shear strains (b) an assumed strain approach for the in-plane components using information from neighbour elements and (c) an averaging of the volumetric strain over the element. The objective is to use this type of elements for the simulation of shells avoiding transverse shear locking, improving the membrane behaviour of the in-plane triangle and to handle quasi-incompressible materials or materials with isochoric plastic flow.

  Abstract
  The solid-shells are an attractive kind of element for the simulation of forming processes, due to the fact that any kind of generic 3D constitutive law can be employed without [...]

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• Métodos avanzados para el cálculo de la resistencia de la última de estructuras de hormigón

  E. Oñate, A. Hanganu

  (1999). Research Report, Nº PI176

  
  

  Abstract

  Se presenta en el trabajo una panorámica de los modelos más recientes para evaluar la resistencia última de estructuras de hormigón en masa y armado. Se presta especial atención al modelo de daño, descubriéndose varios ejemplos de aplicación de este modelo. 

  Abstract
  Se presenta en el trabajo una panorámica de los modelos más recientes para evaluar la resistencia última de estructuras de hormigón en masa y armado. [...]

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• A large strain plasticity model for anisotropic composite materials

  E. Car, S. Oller, E. Oñate

  (1999). Research Report, Nº PI179

  
  

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• Possibilities of the finite element viscous shell approach for analysis of sheet metal forming problems

  E. Oñate, R. Lama

  (1986). Simulation of Metal Forming Processes by the Finite Element Method (SIMOP-I). Lange K. (eds). Berichte aus dem Institut für Umformtechnik der Universität Stuttgart, vol 85. Springer, Berlin, Heidelberg

  
  

  Abstract

  The viscous shell approach combines the use of visco-plastic flow and classical shell theories. The paper presents the general aspects of the viscous shell formulation for axisymmetric and general 3-D shell problems using finite elements. Details of treatment of coordenate updating, friction effects, strain hardening and extensions to include the elastic deformations are also given together with some examples of application to the forming of axisymmetrical thin sheets of metal under hemispherical punches.

  Abstract
  The viscous shell approach combines the use of visco-plastic flow and classical shell theories. The paper presents the general aspects of the viscous shell formulation for [...]

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• Applying multi-objective robust design optimization procedure to the route planning of a commercial aircraft

  J. Pons Prats, G. Bugeda, F. Zarate, E. Oñate, J. Periaux

  (2018). Computational Methods and Models for Transport. Computational Methods in Applied Sciences. Diez, P. Neittaanmäki, P., Periaux, J., Tuovinen, T., Bräysy, O. (Eds.), Vol. 45, pp. 147-167, Springer, Cham

  
  

  Abstract

  Aircraft emission targets worldwide and their climatic effects have put pressure in government agencies, aircraft manufacturers and airlines to reduce water vapour, carbon dioxide (CO2CO2) and oxides of nitrogen (NOxNOx) resulting from aircraft emissions. The difficulty of reducing emissions including water vapor, carbon dioxide (CO2CO2) and oxides of nitrogen (NOxNOx) is mainly due to the fact that a commercial aircraft is usually designed for a particular optimal cruise altitude but may be requested or required to operate and deviate at different altitudes and speeds to archive a desired or commanded flight plan, resulting in increased emissions. This is a multi- disciplinary problem with multiple trade-offs such as optimizing engine efficiency, minimizing fuel burnt and emissions while maintaining prescribed aircraft trajectories, altitude profiles and air safety. There are possible attempts to solve such problems by designing new wing/aircraft shape, new efficient engine, ATM technology, or modifying the aircraft flight plan. Based on the rough data provided by an air carrier company, who was willing to assess the methodology, this paper will present the coupling of an advanced optimization technique with mathematical models and algorithms for aircraft emission, and fuel burnt reduction through flight plan optimization. Two different approaches are presented; the first one describes a deterministic optimization of the flight plan and altitude profile in order to reduce the fuel consumption while reducing time and distance. The second approach presents the robust design optimization of the previous case considering uncertainties on several parameters. Numerical results will show that the methods are able to capture a set of useful trade-offs solutions between aircraft range and fuel consumption, as well as fuel consumption and flight time.

  Abstract
  Aircraft emission targets worldwide and their climatic effects have put pressure in government agencies, aircraft manufacturers and airlines to reduce water vapour, carbon [...]

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• Advances in the DEM and coupled DEM and FEM techniques in non linear solid mechanics

  E. Oñate, F. Zárate, M. Celigueta, J. González, J. Canet, J. Carbonell, F. Garcia, S. Latorre, M. Santasusana

  (2018). (Preprint) Advances in Computational Plasticity. Computational Methods in Applied Sciences. Oñate, E., Peric, D., de Souza Neto, E., Chiumenti, M., (Eds.), Vol. 46, pp. 309-335, Springer

  
  

  Abstract

  In this chapter we present recent advances on the Discrete Element Method (DEM) and on the coupling of the DEM with the Finite Element Method (FEM) for solving a variety of problems in non linear solid mechanics involving damage, plasticity and multifracture situations.

  Abstract
  In this chapter we present recent advances on the Discrete Element Method (DEM) and on the coupling of the DEM with the Finite Element Method (FEM) for solving a variety of [...]

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• A framework for developing finite element codes for multi- disciplinary applications

  P. Dadvand, E. Oñate

  Monograph CIMNE (2008). M109

  
  

  Abstract

  The world of computing simulation has experienced great progresses in recent years and requires more exigent multidisciplinary challenges to satisfy the new upcoming demands. Increasing the importance of solving multi-disciplinary problems makes developers put more attention to these problems and deal with difficulties involved in developing software in this area. Conventional finite element codes have several difficulties in dealing with multi-disciplinary problems. Many of these codes are designed and implemented for solving a certain type of problems, generally involving a single field. Extending these codes to deal with another field of analysis usually consists of several problems and large amounts of modifications and implementations. Some typical difficulties are: predefined set of degrees of freedom per node, data structure with fixed set of defined variables, global list of variables for all entities, domain based interfaces, IO restriction in reading new data and writing new results and algorithm definition inside the code. A common approach is to connect different solvers via a master program which implements the interaction algorithms and also transfers data from one solver to another. This approach has been used successfully in practice but results duplicated implementation and redundant overhead of data storing and transferring which may be significant depending to the solvers data structure. The objective of this work is to design and implement a framework for building multi-disciplinary finite element programs. Generality, reusability, extendibility, good performance and memory efficiency are considered to be the main points in design and implementation of this framework. Preparing the structure for team development is another objective because usually a team of experts in different fields are involved in the development of multi-disciplinary code. Kratos, the framework created in this work, provides several tools for easy implementation of finite element applications and also provides a common platform for natural interaction of its applications in different ways. This is done not only by a number of innovations but also by collecting and reusing several existing works. In this work an innovative variable base interface is designed and implemented which is used at different levels of abstraction and showed to be very clear and extendible. Another innovation is a very efficient and flexible data structure which can be used to store any type of data in a type-safe manner. An extendible IO is also created to overcome another bottleneck in dealing with multi-disciplinary problems. Collecting different concepts of existing works and adapting them to coupled problems is considered to be another innovation in this work. Examples are using an interpreter, different data organizations and variable number of dofs per node. The kernel and application approach is used to reduce the possible conflicts arising between developers of different fields and layers are designed to reflect the working space of different developers also considering their programming knowledge. Finally several technical details are applied in order to increase the performance and efficiency of Kratos which makes it practically usable. This work is completed by demonstrating the framework’s functionality in practice. First some classical single field applications like thermal, fluid and structural applications are implemented and used as benchmark to prove its performance. These applications are used to solve coupled problems in order to demonstrate the natural interaction facility provided by the framework. Finally some less classical coupled finite element algorithms are implemented to show its high flexibility and extendibility.

  Abstract
  The world of computing simulation has experienced great progresses in recent years and requires more exigent multidisciplinary challenges to satisfy the new upcoming demands. [...]

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• Ship hydrodynamics

  E. Oñate, J. García-Espinosa, S. Idelsohn, B. Servan Camas

  (2018). Encyclopedia of Computational Mechanics Second Edition, E. Stein, R. de Borst and T.J.R. Hughes (Eds.), John Wiley & Sons Ltd, Vol. 6, Chapter 24, pp. 1091 - 1137

  
  

  Abstract

  This chapter presents an overview of some computational methods for the analysis of problems in ship hydrodynamics. Attention is focused on the description of stabilized finite element formulations derived via a finite increment calculus (FIC) procedure. Both arbitrary Lagrangian–Eulerian (ALE) and fully Lagrangian forms are presented. Details of the treatment of the free‐surface waves and the interaction between the ship structure and the sea water are given. Potential flow formulations for seakeeping analysis and calculation of the added resistance in waves are also described. Examples of application of the computational methods presented to a variety of ship hydrodynamics and related problems are given.

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

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• A Particle Finite Element Method (PFEM) for coupled thermal analysis of quasi and fully incompressible flows and fluid-structure interaction

  E. Oñate, A. Franci, J. Carbonell

  (2014). (preprint) Numerical simulation of coupled problems in engineering. S. R. Idelsohn (Eds.), pp. 129-156, Springer

  
  

  Abstract

  We present a Lagrangian formulation for coupled thermal analysis of quasi and fully incompressible flows and fluid-structure interaction (FSI) problems that has excellent mass preservation features. The success of the formulation lays on a residual-based stabilized expression of the mass balance equation obtained using the Finite Calculus (FIC) method. The governing equations are discretized with the FEM using simplicial elements with equal linear interpolation for the velocities, the pressure and the temperature. The merits of the formulation in terms of reduced mass loss and overall accuracy are verified in the solution of 2D and 3D adiabatic and thermally-coupled quasi-incompressible free-surface flow problems using the Particle Finite Element Method (PFEM). Examples include the sloshing of water in a tank and the falling of a water sphere and a cylinder into a tank containing water.

  Abstract
  We present a Lagrangian formulation for coupled thermal analysis of quasi and fully incompressible flows and fluid-structure interaction (FSI) problems that has excellent [...]

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• Regularized maxwell equations and nodal finite elements for electromagnetic field computations in frequency domain

  R. Otín, E. Oñate

  Monograph CIMNE (2011). M123

  
  

  Abstract

  In this work we present an alternative approach to the usual finite element formulation based on edge elements and double-curl Maxwell equations. This alternative approach is based on nodal elements and regularized Maxwell equations. The advantages are that, without adding extra unknowns (such as Lagrange multipliers), it provides spurious-free solutions and well-conditioned matrices. Besides, its integral representation involves a less singular kernel (order 1 instead of 3), which makes this approach best suited to hybridization with integral numerical techniques. On the other hand, a new set of difficulties arises that were not present in the classical formulation. The main drawback is that a globally wrong solution is obtained when the electromagnetic field has a singularity in the problem domain. Also, boundary conditions and field discontinuities are more laborious to implement. This work explains how to overcome these difficulties and demonstrates that accurate solutions can be obtained with nodal elements and the regularized formulation. We also present ERMES, the C++ implementation of the finite element approach depicted above and the main deliverable of this work. We compute with ERMES the scattering parameters of microwave filters and the specific absorption rate induced in a body when exposed to electromagnetic fields. ERMES is also the computational tool used in two novel numerical models introduced in this work. The first one characterizes electromagnetic metal forming processes and the second one the transfer impedance of cable shields. The electromagnetic metal forming model calculates the driving Lorentz force and estimates the optimum frequency at which it is attained the maximum workpiece deformation. The main advantage of the approach is that it provides an explicit relation between the capacitance of the capacitor bank and the frequency of the discharge, which is a key parameter in the design of an electromagnetic forming system. The successful application of the regularized formulation in this model reveals its excellent behavior in the low-frequency (quasi-static) regime. The second numerical model introduced in this work computes the transfer impedance of cable shields. The model reproduces the high frequency behavior of the transfer impedance more accurately than the approaches found in the literature and, moreover, it is able to analyze a wider variety of geometries and materials.

  Abstract
  In this work we present an alternative approach to the usual finite element formulation based on edge elements and double-curl Maxwell equations. This alternative approach [...]

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Articles (Documents not available in Scipedia)

• Comparative study of different discrete element models and evaluation of equivalent micromechanical parameters

  J Rojek, C Labra, O Su, E Oñate

  International Journal of Solids and Structures 49 (13), 1497-1517, 2012

• A monolithic Lagrangian approach for fluid–structure interaction problems

  PB Ryzhakov, R Rossi, SR Idelsohn, E Oñate

  Computational mechanics 46 (6), 883-899, 2010

• High‐density sphere packing for discrete element method simulations

  C Labra, E Onate

  Communications in Numerical Methods in Engineering 25 (7), 837-849

• Multi-fluid flows with the particle finite element method

  S Idelsohn, M Mier-Torrecilla, E Oñate

  Computer methods in applied mechanics and engineering 198 (33), 2750-2767, 2009

• Fluid–structure interaction problems with strong added‐mass effect

  SR Idelsohn, F Del Pin, R Rossi, E Oñate

  International journal for numerical methods in engineering 80 (10), 1261-1294, 2009

• Modeling of ground excavation with the particle finite-element method

  JM Carbonell, E Oñate, B Suárez

  Journal of engineering mechanics 136 (4), 455-463, 2009

• Interaction between an elastic structure and free-surface flows: experimental versus numerical comparisons using the PFEM

  SR Idelsohn, J Marti, A Souto-Iglesias, E Onate

  Computational Mechanics 43 (1), 125-132, 2008

• Composite materials non-linear modelling for long fibre-reinforced laminates: Continuum basis, computational aspects and validations

  F Rastellini, S Oller, O Salomón, E Oñate

  Computers & Structures 86 (9), 879-896, 2008

• Validation of the particle finite element method (PFEM) for simulation of free surface flows

  A Larese, R Rossi, E Oñate, SR Idelsohn

  Engineering Computations 25 (4), 385-425, 2008

• Unified Lagrangian formulation for elastic solids and incompressible fluids: application to fluid–structure interaction problems via the PFEM

  SR Idelsohn, J Marti, A Limache, E Oñate

  Computer Methods in Applied Mechanics and Engineering 197 (19), 1762-1776, 2008

• Advances in the particle finite element method for the analysis of fluid–multibody interaction and bed erosion in free surface flows

  E Onate, SR Idelsohn, MA Celigueta, R Rossi

  Computer Methods in Applied Mechanics and Engineering 197 (19), 1777-1800, 2008

• Multiscale analysis using a coupled discrete/finite element model

  J Rojek, E Oñate

  Interaction and Multiscale Mechanics 1 (1), 1-31, 2007

• An improved finite point method for tridimensional potential flows

  E Ortega, E Oñate, S Idelsohn

  Computational Mechanics 40 (6), 949-963, 2007

• A rotation‐free shell triangle for the analysis of kinked and branching shells

  FG Flores, E Onate

  International Journal for Numerical Methods in Engineering 69 (7), 1521-1551, 2007

• Simulation of flows with violent free surface motion and moving objects using unstructured grids

  R Löhner, C Yang, E Oñate

  International Journal for Numerical Methods in Fluids 53 (8), 1315-1338, 2007

• The ALE/Lagrangian particle finite element method: a new approach to computation of free-surface flows and fluid–object interactions

  F Del Pin, S Idelsohn, E Oñate, R Aubry

  Computers & Fluids 36 (1), 27-38, 2007

• Modeling bed erosion in free surface flows by the particle finite element method

  E Oñate, MA Celigueta, SR Idelsohn

  Acta Geotechnica 1 (4), 237-252, 2006

• FIC/FEM formulation with matrix stabilizing terms for incompressible flows at low and high Reynolds numbers

  E Oñate, A Valls, J García

  Computational Mechanics 38 (4-5), 440-455, 2006

• Finite calculus formulations for finite element analysis of incompressible flows. Eulerian, ALE and Lagrangian approaches

  E Oñate, J García, SR Idelsohn, F Del Pin

  Computer methods in applied mechanics and engineering 195 (23), 3001-3037, 2006

• To mesh or not to mesh. That is the question…

  SR Idelsohn, E Onate

  Computer methods in applied mechanics and engineering 195 (37), 4681-4696, 2006

• On the simulation of flows with violent free surface motion

  R Löhner, C Yang, E Oñate

  Computer Methods in Applied Mechanics and Engineering 195 (41), 5597-5620, 2006

• Fluid–structure interaction using the particle finite element method

  SR Idelsohn, E Onate, F Del Pin, N Calvo

  Computer Methods in Applied Mechanics and Engineering 195 (17), 2100-2123, 2006

• Simple modifications for stabilization of the finite point method

  B Boroomand, AA Tabatabaei, E Onate

  International Journal for Numerical Methods in Engineering 63 (3), 351-379, 2005

• A continuum mechanics model for mechanical fatigue analysis

  S Oller, O Salomón, E Oñate

  Computational Materials Science 32 (2), 175-195, 2005

• Simulation of light‐weight membrane structures by wrinkling model

  R Rossi, M Lazzari, R Vitaliani, E Oñate

  International Journal for Numerical Methods in Engineering 62 (15), 2127-2153, 2005

• Improvements in the membrane behaviour of the three node rotation-free BST shell triangle using an assumed strain approach

  FG Flores, E Onate

  Computer Methods in Applied Mechanics and Engineering 194 (6), 907-932, 2005

• Particle finite element method in fluid-mechanics including thermal convection-diffusion

  R Aubry, SR Idelsohn, E Oñate

  Computers & structures 83 (17), 1459-1475, 2005

• Advances in the formulation of the rotation-free basic shell triangle

  E Oñate, FG Flores

  Computer methods in applied mechanics and engineering 194 (21), 2406-2443, 2005

• A general advancing front technique for filling space with arbitrary objects

  R Löhner, E Oñate

  International journal for numerical methods in engineering 61 (12), 1977-1991, 2004

• Finite calculus formulation for incompressible solids using linear triangles and tetrahedra

  E Oñate, J Rojek, RL Taylor, OC Zienkiewicz

  International Journal for Numerical Methods in Engineering 59 (11), 1473-1500, 2004

• Possibilities of finite calculus in computational mechanics

  E Oñate

  International journal for numerical methods in engineering 60 (1), 255-281, 2004

• Combination of discrete element and finite element methods for dynamic analysis of geomechanics problems

  E Onate, J Rojek

  Computer methods in applied mechanics and engineering 193 (27), 3087-3128, 2004

• The particle finite element method: a powerful tool to solve incompressible flows with free‐surfaces and breaking waves

  SR Idelsohn, E Oñate, FD Pin

  International journal for numerical methods in engineering 61 (7), 964-989, 2004

• The particle finite element method—an overview

  E Oñate, SR Idelsohn, F Del Pin, R Aubry

  International Journal of Computational Methods 1 (02), 267-307, 2004

• A residual correction method based on finite calculus

  E Oñate, RL Taylor, OC Zienkiewicz, J Rojek

  Engineering Computations 20 (5/6), 629-658, 2003

• The extended Delaunay tessellation

  N Calvo, SR Idelsohn, E Oñate

  Engineering Computations 20 (5/6), 583-600, 2003

• Polyhedrization of an arbitrary 3D point set

  SR Idelsohn, N Calvo, E Onate

  Computer Methods in Applied Mechanics and Engineering 192 (22), 2649-2667, 2003

• A Lagrangian meshless finite element method applied to fluid–structure interaction problems

  SR Idelsohn, E Onate, F Del Pin

  Computers & Structures 81 (8), 655-671, 2003

• The meshless finite element method

  SR Idelsohn, E Onate, N Calvo, F Del Pin

  International Journal for Numerical Methods in Engineering 58 (6), 893-912, 2003

• Numerical simulation of fiber reinforced composite materials––two procedures

  E Car, F Zalamea, S Oller, J Miquel, E Oñate

  International Journal of Solids and Structures 39 (7), 1967-1986, 2002

• A finite element methodology for local/global damage evaluation in civil engineering structures

  AD Hanganu, E Onate, AH Barbat

  Computers & Structures 80 (20), 1667-1687, 2002

• A finite point method for compressible flow

  R Löhner, C Sacco, E Onate, S Idelsohn

  International Journal for Numerical Methods in Engineering 53 (8), 1765-1779, 2002

• A large strain plasticity model for anisotropic materials—composite material application

  E Car, S Oller, E Oñate

  International Journal of Plasticity 17 (11), 1437-1463, 2001

• Lagrangian formulations to solve free surface incompressible inviscid fluid flows

  SR Idelsohn, MA Storti, E Oñate

  Computer Methods in Applied Mechanics and Engineering 191 (6), 583-593, 2001

• A basic thin shell triangle with only translational DOFs for large strain plasticity

  FG Flores, E Onate

  International Journal for numerical methods in engineering 51 (1), 57-83, 2001

• A finite element method for fluid–structure interaction with surface waves using a finite calculus formulation

  E Oñate, J Garcıa

  Computer methods in applied mechanics and engineering 191 (6), 635-660, 2001

• A finite point method for elasticity problems

  E Oñate, F Perazzo, J Miquel

  Computers & Structures 79 (22), 2151-2163, 2001

• Stabilization techniques for finite element analysis of convection-diffusion problems

  E Oñate, M Manzan

  Developments in Heat Transfer 7, 71-118, 2000

• An anisotropic elastoplastic constitutive model for large strain analysis of fiber reinforced composite materials

  E Car, S Oller, E Oñate

  Computer Methods in Applied Mechanics and Engineering 185 (2), 245-277, 2000

• A simple method for automatic update of finite element meshes

  G Chiandussi, G Bugeda, E Oñate

  Communications in Numerical Methods in Engineering 16 (1), 1-19, 2000

• A finite point method for incompressible flow problems

  E Oñate, C Sacco, S Idelsohn

  Computing and visualization in science 3 (1-2), 67-75, 2000

• Rotation-free triangular plate and shell elements

  E Onate, F Zarate

  International Journal for Numerical Methods in Engineering 47 (1-3), 557-603, 2000

• A stabilized finite element method for incompressible viscous flows using a finite increment calculus formulation

  E Onate

  Computer methods in applied mechanics and engineering 182 (3), 355-370, 2000

• A generalized streamline finite element approach for the analysis of incompressible flow problems including moving surfaces

  MA Cruchaga, E Oñate

  Computer Methods in Applied Mechanics and Engineering 173 (1), 241-255, 1999

• A general procedure for deriving stabilized space–time finite element methods for advective–diffusive problems

  E Oñate, M Manzan

  International Journal for Numerical Methods in Fluids 31 (1), 203-221, 1999

• A homogeneous constitutive model for masonry

  J Lopez, S Oller, E Onate, J Lubliner

  International journal for numerical methods in engineering 46 (10), 1651-1671, 1999

• Application of explicit FE codes to simulation of sheet and bulk metal forming processes

  J Rojek, E Onate, E Postek

  Journal of Materials Processing Technology 80, 620-627, 1998

• An advancing front point generation technique

  R Löhner, E Onate

  Communications in numerical methods in engineering 14 (12), 1097-1108, 1998

• A hierarchical finite element method based on the partition of unity

  RL Taylor, OC Zienkiewicz, E Oñate

  Computer Methods in Applied Mechanics and Engineering 152 (1), 73-84, 1998

• Experimental and numerical issues in the modelling of the mechanical behaviour of masonry

  P Roca, JL González, E Oñate, PB Lourenço

  Structural Analysis of Historical Constructions II. CIMNE, Barcelona, 1998

• A mesh-free finite point method for advective-diffusive transport and fluid flow problems

  E Onate, S Idelsohn

  Computational Mechanics 21 (4-5), 283-292, 1998

• Derivation of stabilized equations for numerical solution of advective-diffusive transport and fluid flow problems

  E Oñate

  Computer Methods in Applied Mechanics and Engineering 151 (1), 233-265, 1998

• A finite element formulation for incompressible flow problems using a generalized streamline operator

  MA Cruchaga, E Oñate

  Computer Methods in Applied Mechanics and Engineering 143 (1), 49-67, 1997

• Viscous damage model for Timoshenko beam structures

  AH Barbat, S Oller, E Oñate, A Hanganu

  International Journal of Solids and Structures 34 (30), 3953-3976, 1997

• A plastic damage constitutive model for composite materials

  S Oller, E Oñate, J Miquel, S Botello

  International journal of Solids and Structures 33 (17), 2501-2518, 1996

• An unstructured grid-based, parallel free surface solver

  R Löhner, C Yang, E Oñate, S Idelssohn

  Centro Internacional de Métodos Numéricos en Ingeniería, 1996

• A stabilized finite point method for analysis of fluid mechanics problems

  E Onate, S Idelsohn, OC Zienkiewicz, RL Taylor, C Sacco

  Computer Methods in Applied Mechanics and Engineering 139 (1), 315-346, 1996

• A finite point method in computational mechanics. Applications to convective transport and fluid flow

  E Onate, S Idelsohn, OC Zienkiewicz, RL Taylor

  International journal for numerical methods in engineering 39 (22), 3839-3866, 1996

• Moving least square approximations for solution of differential equations

  RL Taylor, OC Zienkiewicz, E Oñate, S Idelsohn

  Centro Internacional de Métodos Numéricos en Ingeniería, 1995

• Cálculo de estructuras por el método de elementos finitos: análisis elástico lineal

  E Oñate

  Centro Internacional de Métodos Numéricos en Ingeniería, 1992

• Plastic Flow in Metal Forming. I.--Coupled Thermal. II.--Thin Sheet Forming

  DC Zienkiewicz, E Onate, JC Heinrich

  Applications of Numerical Methods to Forming Processes, 107-120, 1978