Enviaments recents

  • 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)
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    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 ...
  • 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)
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    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 ...
  • Further developments in stress initialization in geomechanics via FEM and a two-step procedure involving Airy functions 

    Rafels Ybern, Carles; Jaqués Adell, Irene; Aliguer Piferrer, Ignasi; Carol, Ignacio; Prat Catalán, Pere; Lakshmikantha, Ramasesha Mookanahallipatna; Segura Segarra, José María (2017)
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    The in-situ stress field in rock masses is a key aspect when a numerical analysis of a rock mass is carried out in any area of geo-engineering, such as civil, mining, or Oil & Gas. A method for the numerical generation of ...
  • Analysis of vertical facing panel-joint gap in reinforced soil walls 

    Puig Damians, Ivan; Bathurst, Richard; Josa Garcia-Tornel, Alejandro; Lloret Morancho, Antonio; Lima, Juan (International Geosynthetics Society (IGS), 2017)
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    This paper extends the numerical parametric study previously reported by the writers for the vertical load distribution and vertical gap compression between facing panel units in steel reinforced soil walls ranging in ...
  • 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)
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    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). ...
  • Modelling of heat and moisture transfer in concrete at high temperature 

    Rodríguez, Mariana; López Garello, Carlos María; Carol, Ignacio (2017)
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    Moisture diffusion and related fluid pressures play a key role in cracking and spalling of concrete subject to high temperatures. This paper describes recent developments of a mode for moisture and heat transfer in porous ...
  • 3D-mesomechanical analysis of external sulfate attack in concrete 

    Pérez Carreras, Adrià; Riera Bayo, Celia; López Garello, Carlos María; Carol, Ignacio (2017)
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    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 ...
  • Modeling concrete expansions via couped C-M mesoscale analysis with zero-thickness interface elements, and lab experiments 

    Carol, Ignacio; Liaudat, Joaquín; López Garello, Carlos María (ISTE-Wiley, 2017)
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    This paper briefly summarizes ongoing developments on C-M coupled modelling of concrete swelling due to external sulfate attack and due to alkali-silica reaction. Both models are based on a meso-mechanical model for concrete, ...
  • Application of configurational mechanics to crack propagation 

    Crusat Codina, Laura; Carol, Ignacio (International Centre for Numerical Methods in Engineering (CIMNE), 2017)
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    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 ...
  • 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)
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    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 ...
  • 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)
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    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)
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    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 ...

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