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Listar por palabra clave "Error estimation"

Mostrando ítems 1-14 de 14

A recovery-type error estimator for the extended finite element method based on singular+smooth stress field splitting

Ródenas, J.J.; González-Estrada, O.A.; Taráncón, J.E.; Fuenmayor, F.J. (John Wiley & Sons, 2008)

[EN] A new stress recovery procedure that provides accurate estimations of the discretization error for linear elastic fracture mechanic problems analyzed with the extended finite element method (XFEM) is presented. The ...
A separated representation of an error indicator for the mesh refinement process under the proper generalized decomposition framework

Nadal, E.; Leygue, A.; Chinesta, F.; Beringhier, M.; Ródenas, J.J.; Fuenmayor Fernández, Francisco Javier (Springer Verlag (Germany), 2015-02)

[EN] Today industries do not only require fast simulation techniques but also verification techniques for the simulations. The proper generalized decomposition (PGD) has been situated as a suitable tool for fast simulation ...
Cartesian grid FEM (cgFEM): High performance h-adaptive FE analysis with efficient error control. Application to structural shape optimization

Nadal Soriano, Enrique (Universitat Politècnica de València, 2014-02-14)

More and more challenging designs are required everyday in today¿s industries. The traditional trial and error procedure commonly used for mechanical parts design is not valid any more since it slows down the design ...
Certification of projection-based reduced order modelling in computational homogenisation by the constitutive relation error

Kerfriden, Pierre; Ródenas, J.J.; Bordas, S.P.-A. (Wiley, 2014-02-10)

In this paper, we propose upper and lower error bounding techniques for reduced order modelling applied to the computational homogenisation of random composites. The upper bound relies on the construction of a reduced model ...
DESARROLLO DE PROGRAMA DE REFINAMIENTO H-ADAPTABLE PARA EL ANÁLISIS GFEM DE PROBLEMAS ELÁSTICOS CON MALLADOS INDEPENDIENTES DE LA GEOMETRÍA

Nadal Soriano, Enrique (Universitat Politècnica de València, 2012-01-17)

Se ha desarrollado un método h-adaptativo para la resolución de problemas elásticos lineales 2D en un entorno GFEM. Para el guiado del proceso h-adaptativo, se ha utilizado en estimado ZZ, cuyo campo reconstruido es casi ...
Efficient recovery-based error estimation for the smoothed finite element method for smooth and singular linear elasticity

González Estrada, Octavio Andrés; Natarajan, S.; J.J. Ródenas; Nguyen-Xuan, H.; Bordas, S.P.A. (Springer Verlag, 2013-07)

[EN] An error control technique aimed to assess the quality of smoothed finite element approximations is presented in this paper. Finite element techniques based on strain smoothing appeared in 2007 were shown to provide ...
Enhanced error estimator based on a nearly equilibrated moving least squares recovery technique for FEM and XFEM

Ródenas, J.J.; González Estrada, Octavio Andrés; Fuenmayor Fernández, Francisco Javier; Chinesta, F. (Springer Verlag, 2012)

In this paper a new technique aimed to obtain accurate estimates of the error in energy norm using a moving least squares (MLS) recovery-based procedure is presented. In the techniques based on the superconvergent patch ...
Estimación y acotación del error de discretización en el modelado de grietas mediante el método extendido de los elementos finitos

González Estrada, Octavio Andrés (Universitat Politècnica de València, 2010-02-19)

El Método de los Elementos Finitos (MEF) se ha afianzado durante las últimas décadas como una de las técnicas numéricas más utilizadas para resolver una gran variedad de problemas en diferentes áreas de la ingeniería, como ...
Extension of the Zienkiewicz-Zhu Error Estimator to Shape Sensitivity Analysis

Fuenmayor Fernández, Francisco-Javier; Oliver Herrero, José Luís; Ródenas, J.J. (John Wiley & Sons, 1997)

[EN] The application of the Zienkiewicz-Zhu estimator was extended to the estimation of the discretization error arising from shape sensitivity analysis using the finite element method. The sensitivity error was quantified ...
Improvement of the Superconvergent Patch Recovery technique by the use of constraint equations: the SPR-C technique

Ródenas, J.J.; Tur, M.; Fuenmayor, F.J.; Vercher, A. (John Wiley & Sons, 2007)

[EN] The superconvergent patch recovery (SPR) technique is widely used in the evaluation of a recovered stress field sigma* from the finite element Solution sigma(fe). Several modifications of the original SPR technique ...
Locally equilibrated stress recovery for goal oriented error estimation in the extended finite element method

González Estrada, Octavio Andrés; Ródenas, J.J.; Bordas, S.P.A.; Nadal, E.; Kerfriden, P.; Fuenmayor Fernández, Francisco Javier (Elsevier, 2015-05)

[EN] Goal oriented error estimation and adaptive procedures are essential for the accurate and efficient evaluation of finite element numerical simulations that involve complex domains. By locally improving the approximation ...
Mesh adaptivity driven by goal-oriented locally equilibrated superconvergent patch recovery

González Estrada, Octavio Andrés; Nadal Soriano, Enrique; Ródenas, J.J.; Kerfriden, P.; Bordas, S.P.A.; Fuenmayor Fernández, Francisco Javier (Springer Verlag (Germany), 2014-05)

[EN] Goal-oriented error estimates (GOEE) have become popular tools to quantify and control the local error in quantities of interest (QoI), which are often more pertinent than local errors in energy for design purposes ...
On the need for the use of error-controlled finite element analyses in structural shape optimization processes

Ródenas, J.J.; Bugeda Castelltort, Gabriel; Albelda Vitoria, José; Oñate Ibáñez de Navarra, Eugenio (Wiley, 2011-09-16)

This work analyzes the influence of the discretization error associated with the finite element (FE) analyses of each design configuration proposed by the structural shape optimization algorithms over the behavior of the ...
On the role of enrichment and statical admissibility of recovered fields in a-posteriori error estimation for enriched finite element methods

González Estrada, Octavio Andrés; Ródenas, J.J.; Bordas, Stéphane Pierre Alain; Duflot, Marc; Kerfriden, Pierre; Giner Maravilla, Eugenio (Emerald, 2012)

Purpose The purpose of this paper is to assess the effect of the statical admissibility of the recovered solution and the ability of the recovered solution to represent the singular solution; also the accuracy, local and ...