By Khalid A. Alshibli, Allen H. Reed
This name discusses a wide diversity of matters on the topic of using computed tomography in geomaterials and geomechanics. The contributions disguise quite a lot of issues, 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 gasoline exploration and creation; neutron tomography and different novel experimental and analytical suggestions; image-based computational modeling; and software program and visualization instruments.
As such, this can be worthwhile examining for somebody drawn to the applying of computed tomography to geomaterials from either primary and utilized perspectives.Content:
Read Online or Download Advances in Computed Tomography for Geomaterials: GeoX 2010 PDF
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Additional info for Advances in Computed Tomography for Geomaterials: GeoX 2010
The voxel size of these images is 14 × 14 × 14 µm3, which means the individual grains can be clearly identified (the mean grain diameter is around 300 µm or 21 voxels so there are several thousand voxels per grain). These in-situ images show that in the latter part of the test the sample starts to lean to the right and the upper platen rotates, which is probably the result of a nonperfect sample. From these images, there is no indication of localized deformation is immediately obvious and enhanced analysis is required to visualize and quantify the localization structure as discussed in the following.
Image after segmentation, 2D Figure 5. Contacts identification, 2D The particle coordination numbers are presented in Figure 6(a) and (b) for the two and three dimensional analyses respectively. The range of coordination number values observed in the 3D case (1-10) greatly exceeds the 2D range (1-4). 67 in 3D. The range of coordination numbers will always be greater in 3D in comparison with the 2D case; uniform 2D disks can attain a maximum coordination number of 6, while uniform 3D spheres can attain a value of 12.
In addition, since the triaxial cell can be mounted on the rotation table, x-ray CT scan during triaxial compression tests can be performed. In the present paper, using the microfocus x-ray CT, visualization of the strain localization and microstructure during compression tests for unsaturated Toyoura sand and Maruyamagawa clay specimens were conducted. e. the microstructures of sand specimens. 2. Microfocus x-ray CT In this study, we used a microfocus x-ray CT system, TOSCANER-32250µHDK assembled by TOSHIBA IT & Control Systems Corporation, which was newly introduced in Dept.