• A Renormalization Group Procedure for Fiber Bundle Models 

      Pradhan, Srutarshi; Hansen, Alex; Ray, Purusattam (Journal article; Peer reviewed, 2018)
      We introduce two versions of a renormalization group scheme for the equal load sharing fiber bundle model. The renormalization group is based on formulating the fiber bundle model in the language of damage mechanics. A ...
    • Can Local Stress Enhancement Induce Stability in Fracture Processes? Part I: Apparent Stability 

      Kjellstadli, Jonas Tøgersen; Bering, Eivind; Hendrick, Martin; Pradhan, Srutarshi; Hansen, Alex (Journal article; Peer reviewed, 2019)
      By comparing the evolution of the local and equal load sharing fiber bundle models, we point out the paradoxical result that stresses seem to make the local load sharing model stable when the equal load sharing model is ...
    • Can Local Stress Enhancement Induce Stability in Fracture Processes? Part II: The Shielding Effect 

      Kjellstadli, Jonas Tøgersen; Bering, Eivind; Pradhan, Srutarshi; Hansen, Alex (Journal article; Peer reviewed, 2019)
      We use the local load sharing fiber bundle model to demonstrate a shielding effect where strong fibers protect weaker ones. This effect exists due to the local stress enhancement around broken fibers in the local load ...
    • Long-term creep prediction with a modified power law model 

      Xie, Xiyang; Fjær, Erling; Pradhan, Srutarshi (Chapter, 2017)
      Creep in weak rock is a common phenomenon observed in the laboratory. Based on short-term creep, prediction of long-term creep can be a challenge especially at elevated stress levels, since only a small stress increase may ...
    • Shale Creep as Leakage Healing Mechanism in CO2 Sequestration 

      Cerasi, Pierre; Lund, Elisabeth; Kleiven, Marta Laukeland; Stroisz, Anna Magdalena; Pradhan, Srutarshi; Kjøller, Claus; Frykman, Peter; Fjær, Erling (Journal article; Peer reviewed, 2017)
      Experiments on shale specimens targeted creep deformation in order to investigate whether this mechanism could be relied upon to close fractures and stop leakage near injection wells. Uniaxial compression tests were conducted ...
    • Stress-Induced Fracturing of Reservoir Rocks: Acoustic monitoring and uCT Image Analysis 

      Pradhan, Srutarshi; Stroisz, Anna Magdalena; Fjær, Erling; Stenebråten, Jørn; Lund, Hans Karl; Sønstebø, Eyvind Frode (Journal article, 2015)
      Stress-induced fracturing in reservoir rocks is an important issue for the petroleum industry. While productivity can be enhanced by a controlled fracturing operation, it can trigger borehole instability problems by ...
    • Variation of elastic energy shows reliable signal of upcoming catastrophic failure 

      Pradhan, Srutarshi; Kjellstadli, Jonas Tøgersen; Hansen, Alex (Journal article; Peer reviewed, 2019)
      We consider the Equal-Load-Sharing Fiber Bundle Model as a model for composite materials under stress and derive elastic energy and damage energy as a function of strain. With gradual increase of stress (or strain) the ...