Now showing items 1-20 of 47

    • A finite strain, finite band method for modeling ductile fracture 

      Huespe, Alfredo Edmundo; Needleman, Alan; Oliver Olivella, Xavier; Sánchez, Pedro J (2012-01)
      Article
      Open Access
      We present a finite deformation generalization of the finite thickness embedded discontinuity formulation presented in our previous paper [A.E. Huespe, A. Needleman, J. Oliver, P.J. Sánchez, A finite thickness band method ...
    • A localized mapped damage model for orthotropic materials 

      Pelà, Luca; Cervera Ruiz, Miguel; Oller Martínez, Sergio Horacio; Chiumenti, Michele (2014-05-08)
      Article
      Restricted access - publisher's policy
      This paper presents an implicit orthotropic model based on the Continuum Damage Mechanics isotropic models. A mapping relationship is established between the behaviour of the anisotropic material and that of an isotropic ...
    • A mixed stabilized finite element formulation for strain localization analysis 

      Chiumenti, Michele; Cervera Ruiz, Miguel; Agelet de Saracibar Bosch, Carlos (2010)
      Conference report
      Open Access
      This work exploits the concept of stabilization techniques to improve the behaviour of either mixed or pu/mixed u/εlinear/linear triangular elements when strain localization analysis is required. Different stabilization ...
    • A new damage model based on non-local displacements 

      Rodríguez Ferran, Antonio; Morata, I; Huerta, Antonio (2005-04)
      Article
      Open Access
      A new non-local damage model is presented. Non-locality (of integral or gradient type) is incorporated into the model by means of non-local displacements. This contrasts with existing damage models, where a non-local strain ...
    • A zero-thickness mortar / Interface formulation with application to fracture mechanics 

      Francisco Sans, Miguel de; Carol, Ignacio (2019)
      Conference report
      Open Access
      A zero-thickness mortar/interface element formulation is briefly described and demonstrated. This element may be considered as an extension of traditional zero-thickness interface element, in order to represent material ...
    • Accurate recovery-based upper error bounds for the extended finite element framework 

      Ródenas García, Juan José; González Estrada, O. A.; Díez, Pedro; Fuenmayor, F. J. (2010-08-01)
      Article
      Open Access
      This paper introduces a recovery-type error estimator yielding upper bounds of the error in energy norm for linear elastic fracture mechanics problems solved using the extended finite element method (XFEM). The paper can ...
    • Adaptive analysis based on error estimation for nonlocal damage models 

      Rodríguez Ferran, Antonio; Arbós, I; Huerta, Antonio (2001-05)
      Article
      Open Access
      An adaptive finite element strategy for nonlocal damage computations is presented. The proposed approach is based on the combination of a residual-type error estimator and quadrilateral h-remeshing. A distinctive feature ...
    • An improved cohesive zone model for ductile dynamic crack propagation 

      Sagimon Buch, Marc (Universitat Politècnica de Catalunya / Technische Universiteit Delft, 2008)
      Master thesis (pre-Bologna period)
      Restricted access - confidentiality agreement
    • Avoiding fracture instability in wedge splitting tests by means of numerical simulations 

      Liaudat, Joaquín; Garolera Vinent, Daniel; Martínez Estévez, Ariadna; Carol, Ignacio; Lakshmikantha, Ramasesha Mookanahallipatna; Alvarellos Iglesias, José (2017)
      Conference report
      Open Access
      In this paper, unstable fracture propagation obtained in a in-house performed experimentalWedge Splitting Test (WST) is simulated by means of the FEM and fracture- based zero-thickness interface elements. In order to obtain ...
    • Benchmarks for the validation of a non local model 

      Jason, L; Ghavamian, S; Pijaudier-Cabot, Gilles; Huerta, Antonio (2004-10)
      Article
      Restricted access - publisher's policy
      The aim of this contribution is to present a series of organised benchmarks that helps at validating the robustness of the FE implementation of a constitutive relation, its pertinence with respect to experiments, and ...
    • Cohesive surface model for fracture based on a two-scale formulation: computational implementation aspects 

      Toro, Sebastian; Sánchez, P.J.; Podestá, J.M.; Blanco, P.J.; Huespe, Alfredo Edmundo; Feijóo, R.A. (2016-10)
      Article
      Open Access
      The paper describes the computational aspects and numerical implementation of a two-scale cohesive surface methodology developed for analyzing fracture in heterogeneous materials with complex micro-structures. This approach ...
    • Computational homogenization for multiscale crack modeling: implementational and computational aspects 

      Nguyen, Vinh Phu; Lloberas Valls, Oriol; Sluys, Lambertus J.; Stroeven, Martijn (John Wiley & sons, 2012-01)
      Article
      Open Access
      A computational homogenization procedure for cohesive and adhesive crack modeling of materials with a heterogeneous microstructure has been recently presented in Computer Methods in Applied Mechanics and Engineering (2010, ...
    • Continuous-discontinuous modelling for quasi-brittle failure: propagating cracks in a regularised bulk 

      Tamayo Mas, Elena (Universitat Politècnica de Catalunya, 2013-12-05)
      Doctoral thesis
      Open Access
      A new strategy to describe failure of quasi-brittle materials -concrete, for example- is presented. Traditionally, numerical simulation of quasi-brittle failure has been tackled from two different points of view: damage ...
    • Continuum approach to computational multi-scale modeling of fracture 

      Oliver Olivella, Xavier; Caicedo Silva, Manuel Alejandro; Roubin, Emmanuel; Huespe, Alfredo Edmundo (2014-09-01)
      Article
      Open Access
      This paper presents a FE2 multi-scale framework for numerical modeling of the structural failure of heterogeneous quasi-brittle materials. The model is assessed by application to cementitious materials. Using the Continuum ...
    • Coupled H-M fracture interaction using FEM with zero-thickness interface elements 

      Garolera Vinent, Daniel; Segura Serra, Josep Maria; Carol, Ignacio; Lakshmikantha, Ramasesha Mookanahallipatna; Alvarellos Iglesias, José (2017)
      Conference report
      Open Access
      Massive treatments of hydraulic fracturing is a procedure employed for low permeability reservoirs stimulation. This technique consists in generating a series of parallel spaced fractures parallel (multi-stage fracturing). ...
    • Crack path field and strain injection techniques in dynamic fracture simulations 

      Lloberas Valls, Oriol; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier; Dias, I.F. (2016)
      Conference report
      Open Access
      Dynamic fracture phenomena are studied employing low cost computational tools based on Finite Elements with Embedded strong discontinuities (E-FEM). Fracture nucleation and propagation are accounted for through the injection ...
    • Crack-path field and strain-injection techniques in computational modeling of propagating material failure 

      Oliver Olivella, Xavier; Dias, I.F.; Huespe, Alfredo Edmundo (2014-01)
      Article
      Open Access
      The work presents two new numerical techniques devised for modeling propagating material failure, i.e. cracks in fracture mechanics or slip-lines in soil mechanics. The first one is termed crack-path-field technique and ...
    • Determination of the energy release rate function for an eccentrically notched center-loaded beam using elastic fracture analysis 

      García Álvarez, Víctor Óscar; Gettu, Ravindra; Carol, Ignacio (2017-04)
      Article
      Restricted access - publisher's policy
      The center-loaded beam with an eccentric notch is a simple test setup for studying non-planar fracture, which is a common cracking mode in structural elements. This work presents a methodology for obtaining the relations ...
    • Displacement-based and hybrid formulations of zero-thickness mortar/interface elements for unmatched meshes, with application to fracture mechanics 

      Francisco Sans, Miguel de; Carol, Ignacio (John Wiley & sons, 2021-02)
      Article
      Open Access
      The present article develops two formulations of zero-thickness mortar/interface finite elements for unmatched meshes, which are implemented in a unified theoretical framework. The first one is displacement-based and may ...
    • Efficient and reliable nonlocal damage models 

      Rodríguez Ferran, Antonio; Morata Ruano, Irene; Huerta, Antonio (2004-07)
      Article
      Open Access
      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, highly localized and parameter-dependent structural ...