Exploració per tema "Fracture"

Ara es mostren els items 1-20 de 45

    • A block particle coupled model and its application to landslides 

      Feng, Chun; Li, Shihai; Quindong, Lin (Elsevier, 2020-01-01)
      Article
      Accés obert
      To simulate the progressive failure of slope, a block particle coupled model is introduced. Particle oriented cell mapping (POCM) algorithm is used to enhance the search efficiency, and particle-point, particle-edge, ...

    • A localized mapped damage model for orthotropic materials 

      Pelà, Luca; Cervera Ruiz, Miguel; Oller Martínez, Sergio Horacio; Chiumenti, Michele (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 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 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 ...

    • A thermodynamically consistent plastic-damage framework for localized failure in quasi-brittle solids: material model and strain localization analysis 

      Wu, Jian-Ying; Cervera Ruiz, Miguel (2016-06)
      Article
      Accés obert
      Aiming for the modeling of localized failure in quasi-brittle solids, this paper addresses a thermodynamically consistent plastic-damage framework and the corresponding strain localization analysis. A unified elastoplastic ...

    • 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 obert
      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 ...

    • Continuum approach to material failure in strong discontinuity settings 

      Oliver Olivella, Xavier; Huespe, Alfredo Edmundo (2004-07)
      Article
      Accés obert
      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
      Accés obert
      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. ...

    • Cylindrical microplane model for fiber reinforced polymer composites 

      Sabounchi, Saeed (Universitat Politècnica de Catalunya, 2023-04-13)
      Tesi
      Accés obert
      (English) Fiber-reinforced polymers (FRPs) are the most used composite materials in many applications, from broom handle to the main structure of advanced aircraft. Despite the enormous research done on these materials, ...

    • Detailed experimental validation and benchmarking of six models for longitudinal tensile failure of unidirectional composites 

      Breite, Christian; Melnikov, Alexander; Turon Travesa, Albert; de Morais, Alfredo Balacó; Le Bourlot, Christophe; Maire, Eric; Schöberl, Erich; Otero Gruer, Fermín Enrique; Sinclair, Ian; Costa Balanzat, Josep; Mayugo Majó, Joan Andreu; Guerrero García, José María; Gorbatikh, Larissa (2022-01)
      Article
      Accés obert
      Longitudinal tensile failure of unidirectional fibre-reinforced composites remains difficult to predict accurately. The key underlying mechanism is the tensile failure of individual fibres. This paper objectively measured ...

    • Dynamics of crack propagation with adaptive refinement based on unfitted meshes 

      Pons Puntí, Adrià (Universitat Politècnica de Catalunya, 2020-07)
      Projecte Final de Màster Oficial
      Accés obert
      Fracture mechanics is a field of mechanics concerned with the study of the propagation of cracks originated in different materials. This field has achieved great popularity in recent years, due to the massive interest of ...

    • EcoBlends’up: PLA/BioPA blends composites, microfibrillated “in situ” through additive manufacturing 

      Martínez Orozco, Leandro Isidro; León Albiter, Noel; Cailloux, Jonathan; Sánchez Soto, Miguel; Maspoch Rulduà, M. Lluïsa; Santana Pérez, Orlando Onofre (2022-04)
      Article
      Accés obert
      In certain polymer blends, a properly oriented microfibrillar morphology of the dispersed phase during the processing stage can generate a reinforcing effect by increasing the fracture toughness, especially in the crack ...

    • 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 ...

    • Effective simulation of the mechanics of longitudinal tensile failure of unidirectional polymer composites 

      Tavares, Rodrigo Paiva; Otero Gruer, Fermín Enrique; Turon Florenza, Albert; Camanho, Pedro P. (Springer, 2017-12)
      Article
      Accés obert
      An efficient computational model to simulate tensile failure of both hybrid and non-hybrid composite materials is proposed. This model is based on the spring element model, which is extended to a random 2D fibre packing. ...

    • 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
      Realitzat a/amb:   Orta Doğu Teknik Üniversitesi (Ankara, Turkey)
      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 ...