Now showing items 1-20 of 49

    • 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 finite thickness band method for ductile fracture analysis 

      Huespe, Alfredo Edmundo; Needleman, Alan; Oliver Olivella, Xavier; Sánchez, Pedro José (2009)
      Article
      Open Access
      We present a finite element method with a finite thickness embedded weak discontinuity to analyze ductile fracture problems. The formulation is restricted to small geometry changes. The material response is characterized ...
    • A framework for robustness assessment in the context of corroded RC structures 

      Cavaco, E. S.; Neves, L. A. C.; Casas Rius, Joan Ramon; Huespe, Alfredo Edmundo (CRC Press, 2010)
      Conference report
      Restricted access - publisher's policy
      Structural robustness is an emergent concept related to the structural response to damage. At the present time, robustness is not well defined and much controversy still remains around this subject. Even if robustness has ...
    • A macroscopic damage-plastic constitutive law for modeling quasi-brittle fracture and ductile behavior of concrete 

      Sánchez, P.J.; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier; Díaz, G.; Sonzogni, Victorio Enrique (2012-04)
      Article
      Open Access
      A new phenomenological macroscopic constitutive model for the numerical simulation of quasi-brittle fracture and ductile concrete behavior, under general triaxial stress conditions, is presented. The model is particularly ...
    • A micromorphic model for steel fiber reinforced concrete 

      Oliver Olivella, Xavier; Mora Méndez, Diego Fernando; Huespe, Alfredo Edmundo; Weyler Pérez, Rafael (2012-10-15)
      Article
      Open Access
      A new formulation to model the mechanical behavior of high performance fiber reinforced cement composites with arbitrarily oriented short fibers is presented. The formulation can be considered as a two scale approach, ...
    • A phase-field model for solute-assisted brittle fracture in elastic-plastic solids 

      Duda, Fernando P.; Ciarbonetti, Angel; Toro, Sebastian; Huespe, Alfredo Edmundo (2018-03)
      Article
      Open Access
      A phase-field theory of brittle fracture in elastoplastic solids hosting mobile interstitial solute species is developed in this paper. The theory, which is formulated within the framework of modern continuum mechanics, ...
    • A phase-field/gradient damage model for brittle fracture in elastic-plastic solids 

      Duda, Fernando P.; Ciarbonetti, A.; Sánchez, P.J.; Huespe, Alfredo Edmundo (2015-02)
      Article
      Open Access
      The formulation of a phase-field continuum theory for brittle fracture in elastic-plastic solids and its computational implementation are presented in this contribution. The theory is based on a virtual-power formulation ...
    • A study on finite elements for capturing strong discontinuities 

      Oliver Olivella, Xavier; Huespe, Alfredo Edmundo; Samaniego Alvarado, Esteban (John Wiley & sons, 2003-04)
      Article
      Open Access
      The work focuses on the presently existing families of finite elements with embedded discontinuities and explores the possibilities of obtaining symmetric statically consistent finite elements that alleviate the stress-locking ...
    • A two-scale failure model for heterogeneous materials: numerical implementation based on the finite element method 

      Toro, Sebastian; Sánchez, Pablo J.; Huespe, Alfredo Edmundo; Giusti, Sebastian Miguel; Blanco, Pedro J.; Feijóo, R.A. (John Wiley & Sons, 2014-02)
      Article
      Open Access
      In the first part of this contribution, a brief theoretical revision of the mechanical and variational foundations of a Failure-Oriented Multiscale Formulation (FOMF) devised for modeling failure in heterogeneous materials ...
    • 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 material design for acoustic cloaking 

      Méndez, Carlos Alberto; Podestá, J.M.; Lloberas Valls, Oriol; Toro, Sebastian; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier (John Wiley & Sons, 2017-12)
      Article
      Open Access
      A topology optimization technique based on the topological derivative and the level set function is utilized to design/synthesize the micro-structure of a pentamode material for an acoustic cloaking device. The technique ...
    • Computational modeling of high-performance steel fiber reinforced concrete using a micromorphic approach 

      Huespe, Alfredo Edmundo; Oliver Olivella, Xavier; Mora, Diego Fernando (2013-12)
      Article
      Open Access
      A finite element methodology for simulating the failure of high performance fiber reinforced concrete composites (HPFRC), with arbitrarily oriented short fibers, is presented. The composite material model is based on a ...
    • 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 ...
    • Continuum approach to computational multiscale modeling of propagating fracture 

      Oliver Olivella, Xavier; Caicedo Silva, Manuel Alejandro; Roubin, Emmanuel; Huespe, Alfredo Edmundo; Hernández Ortega, Joaquín Alberto (2015-09)
      Article
      Open Access
      A new approach to two-scale modeling of propagating fracture, based on computational homogenization (FE2), is presented. The specific features of the approach are: a) a continuum setting for representation of the fracture ...
    • Continuum approach to material failure in strong discontinuity settings 

      Oliver Olivella, Xavier; Huespe, Alfredo Edmundo (2004-07)
      Article
      Open Access
      The paper focuses the numerical modelling of material failure in a strong discontinuity setting using a continuum format. Displacement discontinuities, like fractures, cracks, slip lines, etc., are modelled in a strong ...
    • Continuum approach to the numerical simulation of material failure in concrete 

      Oliver Olivella, Xavier; Huespe, Alfredo Edmundo; Samaniego, E; Chaves, E W V (2004-06)
      Article
      Open Access
      Some new aspects of the continuum strong discontinuity approach (CSDA) to model material failure in geomaterials are addressed. A new global algorithm, for tracking multiple crack lines/surfaces in 2D/3D cases is proposed. ...
    • Control of heat flux using computationally designed metamaterials 

      Fachinotti, Víctor D.; Peralta, Ignacio; Huespe, Alfredo Edmundo; Ciarbonetti, A. (2016)
      Conference report
      Open Access
      To gain control over the diffusive heat flux in a given domain, one has to design metamaterials with a specifc distribution of the generally anisotropic thermal conductivity throughout the domain. Until now, the appropriate ...
    • 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 ...
    • From continuum mechanics to fracture mechanics: the strong discontinuity approach 

      Oliver Olivella, Xavier; Huespe, Alfredo Edmundo; Gómez Pulido, M. Dolores; Chaves, E (2002-01)
      Article
      Open Access
      The paper deals with the strong discontinuity approach and shows the links with the decohesive fracture mechanics provided by that approach. On the basis of 1D continuum damage models it is shown that, by introducing some ...