Ara es mostren els items 1-20 de 26

  • A localized mapped damage model for orthotropic materials 

    Pelà, Luca; Cervera Ruiz, Miguel; Oller Martínez, Sergio Horacio; Chiumenti, Michèle (2014-05-08)
    Article
    Accés restringit per política de l'editorial
    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 phenomenological cohesive model of ferroelectric fatigue 

    Arias Vicente, Irene; Serebrinsky, S; Ortiz, Michael (2006-02)
    Article
    Accés obert
    We develop a phenomenological model of electro-mechanical ferroelectric fatigue based on a ferroelectric cohesive law that couples mechanical displacement and electric-potential discontinuity to mechanical tractions and ...
  • 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 ...
  • Analysis of the thixotropic behavior and the deterioration process of bitumen in fatigue tests 

    Pérez Jiménez, Félix Edmundo; Botella Nieto, Ramón; Miró Recasens, José Rodrigo; Martínez Reguero, Adriana Haydée (2015-12)
    Article
    Accés restringit per política de l'editorial
    The characterization of fatigue damage on bituminous materials under cyclic loading has been classically studied using tests and procedures previously developed for the characterization of metallic materials. However, these ...
  • Application oriented failure modeling and characterization for polymers in automotive pedestrian protection 

    Staack, Holger; Seibert, Dominic; Baier, Horst (CIMNE, 2015)
    Text en actes de congrés
    Accés obert
    In the development process of automotive pedestrian protection (PedPro) for upper- and lower leg impact, the failure of polymer components plays an important role. To influence impact kinematics, fractures can either be ...
  • Contact fatigue of veneer feldspathic porcelain on dental zirconia 

    Rueda Arango, Astrid Oasis; Anglada, M.; Jiménez Piqué, Emilio (2015-03-01)
    Article
    Accés obert
    Objectives. To understand the resistance to cyclic and static contact loading of feldspathic porcelain on dental zirconia (3Y-TZP), in order to understand the partial failure of porcelain (chipping or cracking).; Methods. ...
  • 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 ...
  • Effect of aging on the fracture characteristics and brittleness of a high-strength concrete 

    Gettu, Ravindra; García Álvarez, Víctor Óscar; Aguado de Cea, Antonio (Elsevier, 1998)
    Article
    Accés obert
    Results of notched beam (fracture) tests on a 60 MPa silica fume concrete at the ages of 4, 10, 31 and 232 days are presented. Fracture parameters at the different ages were obtained using the size effect and cohesive ...
  • Experimental investigation of fatigue behavior of curved composite laminates 

    Ustun, Ezgi (Universitat Politècnica de Catalunya, 2016-07-07)
    Projecte Final de Màster Oficial
    Accés obert
    In the aerospace and wind turbine industries, high demand for light weight structures with high strength extend the use of composite laminates in a wide variety of geometries as load carrying elements. However, more complex ...
  • Focused ion beam tomography of zirconia degraded under hydrothermal conditions 

    Jiménez Piqué, Emilio; Ramos, A.; Muñoz Tabares, José Alejandro; Hatton, A.; Soldera, Flavio; Mucklich, F.; Anglada Gomila, Marcos Juan (Elsevier, 2012-08)
    Article
    Accés restringit per política de l'editorial
    Three-dimensional tomography was performed on hydrothermal degraded zirconia by sequential focussed ion beam (FIB) sectioning and field emission scanning electron microscopy (FE-SEM) observation. By means of image analysis ...
  • Fourth order phase-field model for local max-ent approximants applied to crack propagation 

    Amiri, Fatemeh; Millán, Daniel; Arroyo Balaguer, Marino; Silani, Mohammad; Rabczuk, Timon (2016-12)
    Article
    Accés restringit per política de l'editorial
    We apply a fourth order phase-field model for fracture based on local maximum entropy (LME) approximants. The higher order continuity of the meshfree LME approximants allows to directly solve the fourth order phase-field ...
  • Geomechanical stability of the caprock during CO2 sequestration in deep saline aquifers 

    Vilarrasa Riaño, Víctor; Olivella Pastallé, Sebastià; Carrera Ramírez, Jesús (2011)
    Article
    Accés obert
    Sequestration of carbon dioxide (CO2) in deep saline aquifers has emerged as a mitigation strategy for reducing greenhouse gas emissions to the atmosphere. The large amounts of supercritical CO2 that need to be injected ...
  • Geometry of nanoindentation cube-corner cracks observed by FIB tomography: Implication for fracture resistance estimation 

    Cuadrado Lafoz, Núria; Seuba, J.; Casellas, D.; Anglada, M.; Jiménez Piqué, Emilio (Elsevier, 2015-09-01)
    Article
    Accés restringit per política de l'editorial
    When indenting a brittle material with a sharp indenter, cracks can be generated at the corners of the imprint. From the length of these cracks, the fracture resistance can be estimated. This technique is simple and allows ...
  • Influence of polyhedral oligomeric silsesquioxanes on thermal and mechanical properties of melt-mixed poly(methyl methacrylate)/polyhedral oligomeric silsesquioxanes composites 

    Illescas Fernandez, Silvia; Arostegui, Asier (2014-05-03)
    Article
    Accés restringit per política de l'editorial
    In this study, the influence of the functionalization of fully or incomplete condensed polyhedral oligomeric silsesquioxanes composites (POSS) nanoparticles on the properties of poly(methyl methacrylate) (PMMA)-based ...
  • Microplane model M7for fiber reinforced concrete 

    Caner, Ferhun Cem; Bazant, Zdenek Pavel; Wendner, Roman (2013-06-01)
    Article
    Accés restringit per política de l'editorial
    Model M7f is a new model for fiber reinforced concretes under static and dynamic loads, which features two kinds of improvement over the earlier versions: (1) It is built on M7, a new, greatly improved, microplane model ...
  • Microstructural influence on tolerance to corrosion-induced damage in hardmetals 

    Tarrago, J.M.; Fargas Ribas, Gemma; Isern, Lluis; Dorvlo, Selassie; Tarrés, E.; Muller, Carlos; Jiménez Piqué, Emilio; Llanes Pitarch, Luis Miguel (2016)
    Article
    Accés restringit per política de l'editorial
    The influence of the microstructure on the tolerance of WC-Co cemented carbides to corrosion damage was studied by using residual strength as the critical design parameter. In doing so, samples were immersed in synthetic ...
  • Model Order Reduction in computational multiscale fracture mechanics 

    Caicedo Silva, Manuel Alejandro; Oliver Olivella, Xavier; Huespe, Alfredo Edmundo; Lloberas Valls, Oriol (2016-09)
    Article
    Accés obert
    Nowadays, the model order reduction techniques have become an intensive research eld because of the increasing interest in the computational modeling of complex phenomena in multi-physic problems, and its conse- quent ...
  • Modeling and simulation of conducting crack propagation in ferroelectric single crystals under purely electrical loading 

    Abdollahi Hosnijeh, Amir; Arias Vicente, Irene (2013)
    Text en actes de congrés
    Accés obert
    We present a phase-field model of fracture in ferroelectric single crystals for the simulation of conducting crack propagation under purely electrical loading. This is done by introducing the electrical enthalpy of a diffuse ...
  • Modeling tensile crack propagation in concrete gravity dams via crack-path-field and strain injection techniques 

    Dias, I.F.; Oliver Olivella, Xavier; Lemos, J.V.; Lloberas Valls, Oriol (2016-03)
    Article
    Accés restringit per política de l'editorial
    This work investigates tensile crack propagation in concrete gravity dams by using some recently developed numerical techniques (crack-path field and strain injection techniques). The work carefully addresses aspects related ...
  • On the equivalence between traction- and stress-based approaches for the modeling of localized failure in solids 

    Wu, Jian-Ying; Cervera Ruiz, Miguel (2015-09)
    Article
    Accés restringit per política de l'editorial
    This work investigates systematically traction- and stress-based approaches for the modeling of strong and regularized discontinuities induced by localized failure in solids. Two complementary methodologies, i.e., ...