Exploració per tema "COMPDESMAT Project"

Ara es mostren els items 1-20 de 69

    • A comparative study on homogenization strategies for multi-scale analysis of materials 

      Ortolano González, José María; Hernández Ortega, Joaquín Alberto; Oliver Olivella, Xavier (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013-02-01)
      Llibre
      Accés obert
      One of the most important engineering tasks over the years has been the design and manufacture of increasingly sophisticated structural materials as a result of the requirements related to the technological progress. In ...

    • A generalized finite-strain damage model for quasi-incompressible hyperelasticity using hybrid formulation 

      Comellas Sanfeliu, Ester; Bellomo, Facundo J.; Oller Martínez, Sergio Horacio (2016-03)
      Article
      Accés obert
      A new generalized damage model for quasi-incompressible hyperelasticity in a total Lagrangian finite-strain framework is presented. A Kachanov-like reduction factor (1 - D) is applied on the deviatoric part of the hyperelastic ...

    • A homeostatic-driven turnover remodelling constitutive model for healing in soft tissues 

      Comellas Sanfeliu, Ester; Gasser, Thomas Christian; Bellomo, Facundo J.; Oller Martínez, Sergio Horacio (2016-03)
      Article
      Accés obert
      Remodelling of soft biological tissue is characterized by interacting biochemical and biomechanical events, which change the tissue's microstructure, and, consequently, its macroscopic mechanical properties. Remodelling ...

    • A laminated structural finite element for the behavior of large non-linear reinforced concrete structures 

      Escudero Torres, Cuauhtemoc; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (2016-10)
      Article
      Accés obert
      In order to correctly predict the kinematics of complex structures, analysis using three-dimensional finite elements (3DFEs) seems to be the best alternative. However, simulation of large multi-layered structures with many ...

    • A local constitutive model for the discrete element method: application to geomaterials and concrete 

      Oñate Ibáñez de Navarra, Eugenio; Zárate Araiza, José Francisco; Miquel Canet, Juan; Santasusana Isach, Miquel; Celigueta Jordana, Miguel Ángel; Arrufat Garcia, Ferran; Gandikota, Varadaraju; Valiullin, Khaydar; Ring, Lev (Springer, 2015-06)
      Article
      Accés obert
      This paper presents a local constitutive model for modelling the linear and non linear behavior of soft and hard cohesive materials with the discrete element method (DEM). We present the results obtained in the analysis ...

    • 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
      Accés obert
      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
      Accés obert
      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
      Accés obert
      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 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
      Accés obert
      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 ...

    • Advanced numerical techniques for modeling tensile crack propagation in gravity dams 

      Dias, I.F.; Oliver Olivella, Xavier; Lemos, J.V.; Lloberas Valls, Oriol (Laboratório Nacional de Engenharia Civil, 2015)
      Text en actes de congrés
      Accés obert
      Cracks propagating deep inside gravity dams can seriously affect their structural safety. Due to the potential catastrophic scenarios associated to the collapse of large concrete dams, it is a fundamental issue to ...

    • An accurate FIC-FEM formulation for the 1D convection-diffusion-reaction equation 

      Oñate Ibáñez de Navarra, Eugenio; Miquel Canet, Juan; Nadukandi, Prashanth (2016-01)
      Article
      Accés obert
      In this paper we present an accurate stabilized FIC-FEM formulation for the 1D advection-diffusion-reaction equation in the exponential and propagation regimes using two stabilization parameters. Both the steady-state and ...

    • An efficient multi-scale method for non-linear analysis of composite structures 

      Otero Gruer, Fermín Enrique; Martínez García, Javier; Oller Martínez, Sergio Horacio; Salomon Rotlisbeger, Ramon Omar (2015-11-01)
      Article
      Accés obert
      The use of multi-scale procedures is encouraged by the continuous increase of computational capacity, but it is still a challenge performing a non-linear analysis of real composite structures without the aid of large ...

    • An enriched macro finite element for the static analysis of thick general quadrilateral laminated composite plates 

      Rango, Rita F.; Nallim, Liz G.; Oller Martínez, Sergio Horacio (2016-10)
      Article
      Accés restringit per política de l'editorial
      This article presents the formulation of an enriched macro finite element based on the trigonometric shear deformation theory for the static analysis of symmetrically laminated composite plates. Shear correction factor is ...

    • Analysis of ultra low cycle fatigue problems with the Barcelona plastic damage model 

      Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbu, Lucia Gratiela; Barbat Barbat, Horia Alejandro (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013)
      Text en actes de congrés
      Accés obert
      This paper presents a plastic formulation based on the Barcelona plastic damage model capable of predicting the material failure due to Ultra Low Cycle Fatigue. This is achieved taking into account the fracture energy ...

    • Analysis of Ultra Low Cycle Fatigue problems with the Barcelona plastic damage model and a new isotropic hardening law 

      Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbu, Lucia Gratiela; Barbat Barbat, Horia Alejandro; de Jesus, A.M.P. (2015-04)
      Article
      Accés obert
      This paper presents a plastic-damage formulation and a new isotropic hardening law, based on the Barcelona plastic damage model initially proposed by Lubliner et al. (1989) [1], which is capable of predicting steel failure ...

    • 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
      Accés obert
      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
      Accés obert
      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
      Accés obert
      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
      Accés obert
      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 ...

    • Control of heat flux using computationally designed metamaterials 

      Fachinotti, Víctor D.; Peralta, Ignacio; Huespe, Alfredo Edmundo; Ciarbonetti, A. (2016)
      Text en actes de congrés
      Accés obert
      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 ...