An Improved Algorithm in Porosity Characteristics Analysis for Rock and Soil Aggregate
The rock and soil aggregate (RSA) is a special inhomogeneous multiphase geomaterial. It is crucial for stability of engineering by study of RSA mesodamage characteristic. This paper aims at investigating the porosity evolution characteristics of RSA by X-ray computed tomography (CT) under uniaxial c...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Discrete Dynamics in Nature and Society |
| Online Access: | http://dx.doi.org/10.1155/2014/798235 |
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| _version_ | 1832568364264849408 |
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| author | Yanfang Wu Xiao Li Yu Wang Bo Zhang |
| author_facet | Yanfang Wu Xiao Li Yu Wang Bo Zhang |
| author_sort | Yanfang Wu |
| collection | DOAJ |
| description | The rock and soil aggregate (RSA) is a special inhomogeneous multiphase geomaterial. It is crucial for stability of engineering by study of RSA mesodamage characteristic. This paper aims at investigating the porosity evolution characteristics of RSA by X-ray computed tomography (CT) under uniaxial compressive loading. X-ray tomography images were used to extract defects of RSA specimen under different compressive loading. In this paper, we proposed an improved Ostu method to calibrate the beam hardening phenomenon which is caused by X-ray. Also, based on this Ostu method, the outline of rock blocks in RSA is extracted, and the double gray level threshold of soil and rock block is obtained to ensure the reliability of the porosity calculation. We can conclude that the main reason of RSA cracking is the elasticity mismatch between rock blocks and soil, and the porosity evolution of RSA can be divided into four typical stages. These results may be useful to reveal the mesoscopic cracking mechanism and establish mesodamage evolution equation and constitutive relation for RSA. |
| format | Article |
| id | doaj-art-65fc975bd9be491f97fe3b06133e5ecc |
| institution | Kabale University |
| issn | 1026-0226 1607-887X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Discrete Dynamics in Nature and Society |
| spelling | doaj-art-65fc975bd9be491f97fe3b06133e5ecc2025-02-03T00:59:09ZengWileyDiscrete Dynamics in Nature and Society1026-02261607-887X2014-01-01201410.1155/2014/798235798235An Improved Algorithm in Porosity Characteristics Analysis for Rock and Soil AggregateYanfang Wu0Xiao Li1Yu Wang2Bo Zhang3Key Laboratory of Shale Gas and Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Shale Gas and Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Shale Gas and Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Shale Gas and Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaThe rock and soil aggregate (RSA) is a special inhomogeneous multiphase geomaterial. It is crucial for stability of engineering by study of RSA mesodamage characteristic. This paper aims at investigating the porosity evolution characteristics of RSA by X-ray computed tomography (CT) under uniaxial compressive loading. X-ray tomography images were used to extract defects of RSA specimen under different compressive loading. In this paper, we proposed an improved Ostu method to calibrate the beam hardening phenomenon which is caused by X-ray. Also, based on this Ostu method, the outline of rock blocks in RSA is extracted, and the double gray level threshold of soil and rock block is obtained to ensure the reliability of the porosity calculation. We can conclude that the main reason of RSA cracking is the elasticity mismatch between rock blocks and soil, and the porosity evolution of RSA can be divided into four typical stages. These results may be useful to reveal the mesoscopic cracking mechanism and establish mesodamage evolution equation and constitutive relation for RSA.http://dx.doi.org/10.1155/2014/798235 |
| spellingShingle | Yanfang Wu Xiao Li Yu Wang Bo Zhang An Improved Algorithm in Porosity Characteristics Analysis for Rock and Soil Aggregate Discrete Dynamics in Nature and Society |
| title | An Improved Algorithm in Porosity Characteristics Analysis for Rock and Soil Aggregate |
| title_full | An Improved Algorithm in Porosity Characteristics Analysis for Rock and Soil Aggregate |
| title_fullStr | An Improved Algorithm in Porosity Characteristics Analysis for Rock and Soil Aggregate |
| title_full_unstemmed | An Improved Algorithm in Porosity Characteristics Analysis for Rock and Soil Aggregate |
| title_short | An Improved Algorithm in Porosity Characteristics Analysis for Rock and Soil Aggregate |
| title_sort | improved algorithm in porosity characteristics analysis for rock and soil aggregate |
| url | http://dx.doi.org/10.1155/2014/798235 |
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