scholarly journals X-Ray Computed Tomography Image-Based Meso-scale Dynamic Fracture of Concrete Under Compression: Monte Carlo Simulations

2016 ◽  
Author(s):  
Yujie Huang ◽  
Zhenjun Yang ◽  
Guohua Liu
Keyword(s):  
Computed Tomography ◽  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Dynamic Fracture ◽  
X Ray ◽  
Tomography Image ◽  
X Ray Computed ◽  
Computed Tomography Image ◽  
Meso Scale

scholarly journals Constrained Total Generalized p-Variation Minimization for Few-View X-Ray Computed Tomography Image Reconstruction

PLoS ONE ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. e0149899 ◽  
Author(s):  
Hanming Zhang ◽  
Linyuan Wang ◽  
Bin Yan ◽  
Lei Li ◽  
Ailong Cai ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Reconstruction ◽  
X Ray ◽  
Tomography Image ◽  
X Ray Computed ◽  
Computed Tomography Image

scholarly journals Low-dose X-ray computed tomography image reconstruction with a combined low-mAs and sparse-view protocol

2014 ◽  
Vol 22 (12) ◽  
pp. 15190 ◽  
Author(s):  
Yang Gao ◽  
Zhaoying Bian ◽  
Jing Huang ◽  
Yunwan Zhang ◽  
Shanzhou Niu ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Reconstruction ◽  
Low Dose ◽  
X Ray ◽  
Tomography Image ◽  
X Ray Computed ◽  
Computed Tomography Image

Digital rock physics: Segmentation of sub-resolution features

2020 ◽  
Author(s):  
Martin Balcewicz ◽  
Erik H. Saenger
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Rock Physics ◽  
Rock Properties ◽  
X Ray ◽  
Digital Rock Physics ◽  
Tomography Image ◽  
X Ray Computed ◽  
Computed Tomography Image ◽  
Elastic Rock

<p>Digital rock physics (DRP) became a complementary part in reservoir characterization during the last two decades. Deriving transport, thermal, or effective elastic rock properties from a digital twin requires a three-step workflow: (1) Preparation of a high-resolution X-ray computed tomography image, (2) segmentation of pore and grain phases, respectively, and (3) solving equations due to the demanded properties. Despite the high resolution µ-CT images, the numerical predictions of rock properties have their specific uncertainties compared to laboratory measurements. Missing unresolved features in the µ-CT image might be the key issue. These findings indicate the importance of a full understanding of the rocks microfabrics. Most digital models used in DRP treat the rock as a heterogeneous, isotropic, intact medium which neglect unresolved features. However, we expect features within the microfabrics like micro-cracks, small-scale fluid inclusions, or stressed grains which may influence the elastic rock properties but have not been taken into account in DRP, yet. Former studies have shown resolution-issues in grain-to-grain contacts within sandstones or inaccuracies due to micro-porosity in carbonates, this means the micritic phase. Within the scope of this abstract, we image two different sandstone samples, Bentheim and Ruhrsandstone, as well as one carbonate sample. Here, we compare the mentioned difficulties of X-ray visualization with further analytical methods, this means thin section and focused ion beam measurements. This results into a better understanding of the rocks microstructures and allows us to segment unresolved features in the X-ray computed tomography image. Those features can be described with effective properties at the µ-scale in the DRP workflow to reduce the uncertainty of the predicted rock properties at the meso- and fieldscale.</p>

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