Fracture Evolution Mechanism of Hollow Sandstone Under Conventional Triaxial Compression by X-ray Micro-CT Observations and Three-Dimensional Numerical Simulations

2022 ◽  
pp. 279-318
Author(s):  
Sheng-Qi Yang
Keyword(s):  
Numerical Simulations ◽  
Triaxial Compression ◽  
Three Dimensional ◽  
Micro Ct ◽  
Evolution Mechanism ◽  
X Ray ◽  
Fracture Evolution ◽  
Conventional Triaxial Compression

Fracture evolution in concrete compressive fatigue experiments based on X-ray micro-CT images

2019 ◽  
Vol 122 ◽  
pp. 256-272 ◽  
Author(s):  
Ł. Skarżyński ◽  
I. Marzec ◽  
J. Tejchman
Keyword(s):  
Ct Images ◽  
Micro Ct ◽  
X Ray ◽  
Fracture Evolution

scholarly journals The Determination Of Diffusive Tortuosity In Concrete Specimens Using X-Ray Microtomography

2015 ◽  
Vol 60 (2) ◽  
pp. 1115-1119 ◽  
Author(s):  
Z. Ranachowski ◽  
D. Jóźwiak-Niedźwiedzka ◽  
P. Ranachowski ◽  
M. Dąbrowski ◽  
S. Kudela ◽  
...  
Keyword(s):  
Random Walk ◽  
Three Dimensional ◽  
Micro Ct ◽  
Connectivity Analysis ◽  
Pore Connectivity ◽  
Cement Ratio ◽  
X Ray ◽  
Water To Cement Ratio ◽  
Random Walk Simulation

Abstract The paper presents a method of pore connectivity analysis applied to specimens of cement based composites differing in water to cement ratio. The method employed X-ray microtomography (micro-CT). Microtomography supplied digitized three-dimensional radiographs of small concrete specimens. The data derived from the radiographs were applied as an input into the application based on the algorithm called ‘random walk simulation’. As the result a parameter called diffusive tortuosity was established and compared with estimated porosity of examined specimens.

Three-dimensional imaging of whole mouse models: comparing nondestructive X-ray phase-contrast micro-CT with cryotome-based planar epi-illumination imaging

2013 ◽  
Vol 253 (1) ◽  
pp. 24-30 ◽  
Author(s):  
A. TAPFER ◽  
M. BECH ◽  
I. ZANETTE ◽  
P. SYMVOULIDIS ◽  
S. STANGL ◽  
...  
Keyword(s):  
Mouse Models ◽  
Phase Contrast ◽  
Three Dimensional ◽  
Micro Ct ◽  
Three Dimensional Imaging ◽  
X Ray

scholarly journals Micro-CT study of Middle Ordovician Spumellaria (radiolarians) from western Newfoundland, Canada

2020 ◽  
Vol 94 (3) ◽  
pp. 417-435 ◽  
Author(s):  
Sarah Kachovich ◽  
Jonathan C. Aitchison
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Detailed Examination ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Lower Paleozoic ◽  
X Ray ◽  
Middle Ordovician ◽  
Radiolarian Assemblage ◽  
Taxonomic Groups

AbstractA new, previously undescribed Middle Ordovician (middle Darriwilian: Dw2) radiolarian assemblage has been recovered from the Table Cove Formation at Piccadilly Quarry, western Newfoundland. Constituents of the fauna described herein are both distinctive and exceptionally well preserved. Three-dimensional X-ray micro-computed tomography (μ-CT) is used to make a detailed examination of four key spumellarian specimens. This technology enables visualization of hitherto ambiguous details of the internal morphologies of key lower Paleozoic taxonomic groups, among which a lack of knowledge has impeded resolution of higher taxonomic rankings.

scholarly journals Statistical Assessment of the Microstructure of Barite Aggregate from Different Deposits Using X-Ray Microtomography and Optical Microscopy

2017 ◽  
Vol 62 (2) ◽  
pp. 697-702
Author(s):  
N. Żołek ◽  
Z. Ranachowski ◽  
P. Ranachowski ◽  
D. Jóźwiak-Niedźwiedzka ◽  
S. Kudela ◽  
...  
Keyword(s):  
Optical Microscopy ◽  
Barium Sulfate ◽  
Three Dimensional ◽  
Empty Space ◽  
Paper Analysis ◽  
Micro Ct ◽  
Statistical Assessment ◽  
Thin Sections ◽  
X Ray ◽  
Additional Information

AbstractTwo different barite ore (barium sulfate BaSO4) specimens from different localizations were tested and described in this paper. Analysis of the microstructure was performed on polished sections, and on thin sections using X-ray microtomography (micro-CT), and optical microscopy (MO). Microtomography allowed obtaining three-dimensional images of the barite aggregate specimens. In the tomograms, the spatial distribution of the other polluting phases, empty space as well as cracks, pores, and voids – that exceeded ten micrometers of diameter-were possible to visualize. Also, the micro-CT allowed distinguishing between minerals of different density, like SiO2and BaSO4. Images obtained and analyzed on thin sections with various methods using the optical microscopy in transmitted light delivered additional information on the aggregate microstructure, i.e. allow for estimation of the different kinds of inclusions (like the different density of the minerals) in the investigated specimens. Above methods, which were used in the tests, completed each another in order to supply a set of information on inclusions’ distribution and to present the important differences of the barite aggregate specimens microstructure.

Sarcoptes scabiei var. hominis: Three-dimensional structure of a female imago and crusted scabies lesions by X-ray micro-CT

2009 ◽  
Vol 122 (4) ◽  
pp. 268-272 ◽  
Author(s):  
Hideyuki Yoshimura ◽  
Takuji Ohigashi ◽  
Masayuki Uesugi ◽  
Kentaro Uesugi ◽  
Toshiaki Higashikawa ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Sarcoptes Scabiei ◽  
Dimensional Structure ◽  
Micro Ct ◽  
X Ray ◽  
Three Dimensional Structure ◽  
Crusted Scabies
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