Browsing Institutt for geofag by Author "Kandula, Neelima"

Now showing items 1-9 of 9

  • Creep Burst Coincident With Faulting in Marble Observed in 4-D Synchrotron X-Ray Imaging Triaxial Compression Experiments 
    Renard, Francois; Kandula, Neelima; McBeck, Jessica Ann; Cordonnier, Benoit (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Faults in carbonate rocks show both seismic and aseismic deformation processes, leading to a wide range of slip velocities. We deformed two centimeter‐scale cores of Carrara marble at 25°C and imaged the nucleation and ...
  • Critical Evolution of Damage Toward System-Size Failure in Crystalline Rock 
    Renard, Francois; Weiss, Jérôme; Mathiesen, Joachim; Ben-Zion, Yehuda; Kandula, Neelima; Cordonnier, Benoit (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Rock failure under shear loading conditions controls earthquake and faulting phenomena. We study the dynamics of microscale damage precursory to shear faulting in a quartz‐monzonite rock representative of crystalline rocks ...
  • Dynamic in situ three-dimensional imaging and digital volume correlation analysis quantify strain localization and fracture coalescence in sandstone 
    Renard, Francois; McBeck, Jessica Ann; Cordonnier, Benoit; Zheng, Xiaojiao; Kandula, Neelima; Sanchez, Jesus Rodriguez; Kobchenko, Maya; Noiriel, Catherine; Zhu, Wenlu; Meakin, Paul; Fusseis, Florian; Dysthe, Dag Kristian (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Advances in triaxial compression deformation apparatus design, dynamic X-ray microtomography imaging, data analysis techniques, and digital volume correlation analysis provide unparalleled access to the in situ four-dimensional ...
  • Dynamic synchrotron imaging of brittle failure in crustal rocks 
    Kandula, Neelima (Doctoral thesis / Doktoravhandling, 2021)
    Majority of earthquakes originate at depths of 15-20 kilometers and may propagate on to the surface resulting in catastrophes. Predicting their occurrence is an important question in Earth science. These geological phenomena ...
  • Dynamics of microscale precursors during brittle compressive failure in Carrara marble 
    Kandula, Neelima; Cordonnier, Benoit; Boller, Elodie; Weiss, Jérôme; Dysthe, Dag Kristian; Renard, Francois (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Microscale heterogeneities influence failure mechanisms in the crust. To track the microstructural changes in rock samples when loaded until failure, we employed a novel experimental technique that couples dynamic X‐ray ...
  • Isolating the factors that govern fracture development in rocks throughout dynamic in situ X-ray tomography experiments 
    McBeck, Jessica Ann; Kandula, Neelima; Aiken, John Mark; Cordonnier, Benoit; Renard, Francois (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Centuries of work have highlighted the importance of several characteristics on fracture propagation. However, the relative importance of each characteristic on the likelihood of propagation remains elusive. We rank this ...
  • Microscale characterization of rupture nucleation unravels precursors to faulting in rocks 
    Renard, Francois; Cordonnier, Benoit; Kobchenko, Maya; Kandula, Neelima; Weiss, Jérôme; Zhu, Wenlu (Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
    Precursory signals, manifestations of microscale damage that precedes dynamic faulting, are key to earthquake forecasting and risk mitigation. Detections of precursors have primarily relied on measurements performed using ...
  • Synchrotron 4D X-Ray Imaging Reveals Strain Localization at the Onset of System-Size Failure in Porous Reservoir Rocks 
    Kandula, Neelima; McBeck, Jessica Ann; Cordonnier, Benoît; Weiss, Jérôme; Dysthe, Dag Kristian; Renard, François (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Abstract Understanding the mechanisms of strain localization leading to brittle failure in reservoir rocks can shed light on geomechanical processes such as porosity and permeability evolution during rock deformation, ...
  • Volumetric and shear processes in crystalline rock approaching faulting 
    Renard, Francois; McBeck, Jessica Ann; Kandula, Neelima; Cordonnier, Benoit; Meakin, Paul; Ben-Zion, Yehuda (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Understanding the approach to faulting in continental rocks is critical for identifying processes leading to fracturing in geomaterials and the preparation process of large earthquakes. In situ dynamic X-ray imaging and ...