Ara es mostren els items 1-20 de 45

  • 3D analysis of H-M coupled problem with zero-thickness interface elements applied to geomechanics 

    Garolera Vinent, Daniel; Segura Serra, Josep Maria; Carol, Ignacio; Lakashmikhanta, Ramasesha; Alvarellos, J. (CIMNE, 2015)
    Comunicació de congrés
    Accés obert
    In spite of the significant developments seen in recent years,numerical modelin of Hydraulic Fracturing still poses major challenges due to the strong coupling between fluid flow and crack development,which is itself a ...
  • 3D-mesomechanical analysis of external sulfate attack in concrete 

    Pérez Carreras, Adrià; Riera Bayo, Celia; López Garello, Carlos María; Carol, Ignacio (2017)
    Text en actes de congrés
    Accés obert
    The present study focuses on degradation of concrete by external sulfate attack. The numerical model developed by the MECMAT/UPC group, incorporates coupled C-M analysis using a meso-mechanical approach with discrete ...
  • 3D numerical model of a confined fracture tests in concrete 

    Montenegro, Oscar Ivan; Sfer, Domingo; López Garello, Carlos María; Carol, Ignacio (2013)
    Text en actes de congrés
    Accés obert
    The paper deals with the numerical simulation of a confined fracture test in concrete. The test is part of the experimental work carried out at ETSECCPB-UPC in order to elucidate the existence of a second mode of fracture ...
  • Análisis del hormigón en modo mixto de fractura utilizando un modelo meso-estructural con elementos junta. 

    López Garello, Carlos María; Carol, Ignacio; Carol, Ignacio (2010)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    En este trabajo se presentan resultados de la simulación numérica de algunos ensayos experimentales sobre muestras de hormigón sometidas a carga biaxial que combina tracción y corte [1]. Para ello se emplea una modelización ...
  • Análisis mecomecánico de la fisuración del hormigón sometido a la acción de altas temperaturas 

    Rodríguez, Mariana; Pérez, Adrià; López Garello, Carlos María; Carol, Ignacio (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Un modelo meso estructural 2D empleado inicialmente en el análisis mecánico del hormigón bajo altas temperaturas, es extendido en este trabajo a un análisis 3D y a un análisis termo-mecánico acoplado más complejo. El ...
  • Análisis mesomecánico del hormigón bajo cargas que generan cambios de dirección de fisuración 

    Puiggrós Parayre, Luis Javier; López Garello, Carlos María; Rodríguez, Mariana; Carol, Ignacio (2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Para contrastar y comparar el comportamiento de modelos constitutivos del hormigón que tienen en cuenta la anisotropía inducida por fisuración y daño, con frecuencia se ha empleado un test teórico en el cual se impone un ...
  • Application of configurational mechanics to crack propagation 

    Crusat Codina, Laura; Carol, Ignacio (International Centre for Numerical Methods in Engineering (CIMNE), 2017)
    Text en actes de congrés
    Accés obert
    Crack initiation and propagation is an essential aspect in the mechanical behavior of a large variety of materials and structures in all fields of Engineering and, in particular, the prediction of crack trajectories is one ...
  • ASR expansions in concrete under triaxial confinement 

    Liaudat, Joaquín; Carol, Ignacio; López Garello, Carlos María; Saouma, Victor E. (2018-02)
    Article
    Accés restringit per política de l'editorial
    It is well known that the Alkali-Silica Reaction (ASR) expansion in concrete is influenced by the stress state of the material. However, the extent and nature of this influence is not completely understood due to the ...
  • 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)
    Text en actes de congrés
    Accés obert
    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 ...
  • Comparison of discrete and equivalent continuum approaches to simulate the mechanical behavior of jointed rock masses 

    Gonzalez, Nubia Aurora; Vargas, P.E.; Carol, Ignacio; Das, K. C.; Sandha, S.S.; Rodrigues, E.; Mello,, U.; Segura Segarra, José María; Lakshmikantha, Ramasesha Mookanahallipatna (CRC Press, 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Modeling of rock masses is of major importance to assess the Geomechanical behaviour of oil &gas reservoirs, especially for fractured tight reservoirs. The presence of discontinuities will significantly influence the general ...
  • Computational modeling of external sulfate attack in concrete at the meso-level 

    Idiart Castellano, Andrés Enrique; Carol, Ignacio; López Garello, Carlos María; Murcia Vela, Juan (2009)
    Text en actes de congrés
    Accés restringit per decisió de l'autor
    This paper presents recent work by the authors along the domain of coupled chemo-mechanical problems in concrete. External sulfate attack is analyzed from a mesoscale point of view, in which the main heterogeneities of ...
  • 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)
    Text en actes de congrés
    Accés obert
    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). ...
  • Coupling a fluid flow simulation with a geomechanical model of a fractured reservoir 

    Segura Segarra, José María; Paz, C.M.; de Bayser, M.; Zhang, J.; Bryant, P.W.; Gonzalez, Nubia Aurora; Rodrigues, E.; Vargas, P.E.; Carol, Ignacio; Lakshmikantha, Ramasesha Mookanahallipatna; Das, K. C.; Sandha, S.S.; Cerqueira, R.; Mello,, U. (OnePetro, 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Improving the reliability of integrated reservoir development planning and addressing subsidence, fault reactivation and other environmental impacts, requires increasingly sophisticated geomechanical models, especially in ...
  • 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
    Accés restringit per política de l'editorial
    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 ...
  • Diffusion-reaction modelling of the degradation of oil-well cement exposed to carbonated brine 

    Martínez Estévez, Ariadna; Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (2017)
    Text en actes de congrés
    Accés obert
    The essential aspects of a diffusion-reaction model in development for the degradation process of oil-well cement exposed to carbonated brine are presented in this paper. The formulation consists of two main diffusion/reaction ...
  • Discrete modeling of multiple discontinuities in rock mass using XFEM 

    Das, Kamal C.; Ausas, Roberto Federico; Carol, Ignacio; Rodrigues, Eduardo; Sandeep, Sandra; Vargas, P. E.; Gonzalez, Nubia Aurora; Segura, Josep María; Lakshmikantha, Ramasesha Mookanahallipatna; Mello,, U. (OnePetro, 2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Modeling of discontinuities (fractures and fault surfaces) is of major importance to assess the geomechanical behavior of oil and gas reservoirs, especially for tight and unconventional reservoirs. Numerical analysis of ...
  • Efem vs. XFEM: a comparative study for modeling strong discontinuity in geomechanics 

    Das, Kamal C.; Ausas, Roberto Federico; Segura Segarra, José María; Narang, Ankur; Rodrigues, Eduardo; Carol, Ignacio; Lakshmikantha, Ramasesha Mookanahallipatna; Mello,, U. (OnePetro, 2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Modeling of big faults or weak planes of strong and weak discontinuities is of major importance to assess the Geomechanical behaviour of mining/civil tunnel, reservoirs etc. For modelling fractures in Geomechanics, prior ...
  • Efficient numerical integration of Perzyna viscoplasticity, with application to rock slope stability using zero-thickness interface elements 

    Aliguer Piferrer, Ignasi; Carol, Ignacio (CRC Press, 2014)
    Text en actes de congrés
    Accés obert
    In this paper, Perzyna-type viscoplastic rate equations are integrated for a time step by considering the step as stress-driven. Depending on how the increment is imposed (constant, linear etc.), different strategies arise. ...
  • Empleo de elementos junta en el análisis lineal de fractura. Aplicación al estudio de la fractura en modo mixto 

    García Álvarez, Víctor Óscar; Gettu, Ravindra; Carol, Ignacio (Universitat Politècnica de Catalunya, 2001)
    Article
    Accés obert
    En este artículo se va a presentar la aplicación de los elementos junta al análisis de la propagación de la fisura. El estudio se va a limitar a la realización de un análisis lineal de la fractura aplicando la Mecánica Elástica ...
  • Evaluación de la seguridad en problemas de mecánica de rocas mediante el método c-Φ reduction 

    Aliguer Piferrer, Ignasi; Carol, Ignacio; Alonso Pérez de Agreda, Eduardo (Universitat Politècnica de Catalunya. Escola Tècnica Superior d'Enginyers de Camins Canals i Ports de Barcelona, 2011-11-15)
    Comunicació de congrés
    Accés obert
    En este documento de detalla de forma sintética el trabajo realizado hasta la fecha en la realización por parte del primer autor de la tesis doctoral que lleva por título: “Métodos Numéricos Avanzados para Evaluar la ...