Exploració per autor "Carol, Ignacio"Més informacióMés informació

Ara es mostren els items 23-42 de 93

    • 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 C-M meso-scale model for ASR expansion in concrete 

      Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (CRC Press/Balkema, 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      As part of an ongoing development, this paper presents a brief description of a new Chemo-Mechanical (C-M) model for the expansions due to Alkali-Silica Reaction (ASR) in concrete. This model has been formulated at the ...

    • 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). ...

    • Coupled h-m fracture interaction using fem with zero-thickness interface elements 

      Garolera Vinent, Daniel; Segura, J. M.; Carol, Ignacio; Lakshmikantha, M.R.; Alvarellos, J. (CIMNE, 2017)
      Text en actes de congrés
      Accés obert
      Intensive hydraulic fracturing is a procedure employed for low permeability reservoir stimulation. This technique consists of generating a sequence of regularly spaced parallel fractures (multi-stage fracturing). The ...

    • 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 model for alkali-silica reaction in concrete 

      Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (CIMNE, 2013)
      Text en actes de congrés
      Accés obert
      A new diffusion-reaction model for the potentially deleterious Alkali-Silica Reaction (ASR) process in concrete is presented. The model involves three coupled diffusion processes, two in-goingand one out-goingfrom the ...

    • 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 ...

    • Diffusion-reaction modelling of the degradation of oil-well cement exposed to carbonated brine 

      Martínez, A.; Llaudat, J.; López, C.M.; Carol, Ignacio (CIMNE, 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 ...

    • Displacement-based and hybrid formulations of zero-thickness mortar/interface elements for unmatched meshes, with application to fracture mechanics 

      Francisco Sans, Miguel de; Carol, Ignacio (John Wiley & sons, 2021-02)
      Article
      Accés obert
      The present article develops two formulations of zero-thickness mortar/interface finite elements for unmatched meshes, which are implemented in a unified theoretical framework. The first one is displacement-based and may ...

    • 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 ...

    • Effect of long-term pore pressure evolution on the integrity of cement plugs of abandoned oil wells in CCS sites 

      Martínez Estévez, Ariadna; Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
      Text en actes de congrés
      Accés obert
      In the context of Carbon Capture Storage (CCS) in abandoned hydrocarbon reservoirs, a preliminary study of the effects of pore pressure evolution on the integrity of oil-well cement seals is performed. A 2D cross-section ...

    • 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 ...

    • Evaluation of Safety Factors in Discontinuous Rock 

      Alonso Pérez de Agreda, Eduardo; Carol, Ignacio; Delahaye, Carlos Héctor; Gens Solé, Antonio; Prat Catalán, Pere (Elsevier, 1996)
      Article
      Accés restringit per política de l'editorial
      Safety factors for kinematically admissible failure mechanisms in jointed rock masses have been defined with linear and nonlinear failure criteria for rock discontinuities. Data required to compute these safety factors ...

    • Experimental study of the effects of mechanical restraints on ASR expansions in concrete 

      Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (2021-03)
      Article
      Accés obert
      This paper summarizes an experimental campaign devoted to the study of the effect of (internal and external) mechanical restraints on Alkali-Silica Reaction (ASR) expansions in concrete made with sodalime (SL) glass as ...

    • Free expansion tests for ASR at the level of a single aggregate-matrix interface: experimental results and numerical modelling 

      Liaudat, Joaquín; López Garello, Carlos María; Carol, Ignacio (Springer, 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      As part of an on-going research project, a model being developed to simulate ASR in concrete is described. The formulation consists of the three main diffusion/reaction field equations for the concentrations of Alkali, ...