By Khalid A. Alshibli, Allen H. Reed
This identify discusses a wide variety of matters regarding using computed tomography in geomaterials and geomechanics. The contributions hide quite a lot of themes, together with deformation and pressure localization in soils, rocks and sediments; fracture and harm overview in rocks, asphalt and urban; delivery in porous media; oil and fuel exploration and creation; neutron tomography and different novel experimental and analytical recommendations; image-based computational modeling; and software program and visualization instruments.
As such, this can be beneficial interpreting for an individual attracted to the applying of computed tomography to geomaterials from either primary and utilized perspectives.Content:
Read or Download Advances in Computed Tomography for Geomaterials: GeoX 2010 PDF
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Extra info for Advances in Computed Tomography for Geomaterials: GeoX 2010
This is a consequence of the range of particle sizes, there are fewer larger particles and the CN values tend to increase with increasing particle size. (a) (b) Figure 6. Histograms of particle coordination numbers (CN) (a) 2D (b) 3D (a) (b) Figure 7. Histograms of particle contact indices (CI) (a) 2D (b) 3D (a) (b) Figure 8. Contact index (CI) variation with Coordination Number (CN) (a) 2D (b) 3D 24 GeoX 2010 The contact index data is presented in Figure 7(a) (2D) and Figure 7(a) (3D). The data is rather erratic and it is difficult to identify a dominant or representative CI value, it is however clear from both the 2D and 3D analysis that most of the particles have CI values in that are less than 30%.
No change in curvature is shown at 5% axial strain for the z-displacement curve. 5% axial strain. 9d50) for the z-displacement. On the other hand, particles outside shear band show much less sliding when compared to those within the shear band. 9d50) for the z-displacement. Figure 1. Illustrative example of particles evolution during shear Advances in Computed Tomography for Geomaterials 31 Figure 2. Displacements of tracked particles (a) within the shear band; (b) outside the shear band However, the trends show that these particles experience a small amount of sliding until 5% axial strain.
1) (2) (3) (4) (5) (6) (7) Figure 2. 2. 3D-volumetric DIC Continuum 3D-volumetric DIC was carried out on consecutive pairs of the 3D xray tomography image volumes to provide the 3D displacement and strain fields for each increment. The details of this procedure are presented in Hall et al. (2009) and Hall et al. (2010). Figure 3 shows vertical slices through DIC-derived maximum shear strain volumes; as in the previous images, these vertical slices are cut roughly perpendicular to the “plane” of localization that developed during the test.