Investigation on the relationship between CT numbers and marble failure under different confining pressures

Computed tomography (CT) scanning technology is helpful in investigating rock materials as it can demonstrate the micro structure of rock clearly. Conventional triaxial compression tests and the corresponding graded triaxial loading tests were carried out to investigate the complex failure mechanism...

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Autores principales:	Yan-Shuang Yang, Kai-Yue Li, Hui Zhou, Hao-Yuan Tian, Wei Cheng, Zhan-Rong Zhang, Musonda Kaunda
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	ct scan confining pressure statistical distribution damage variable Technology T Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/c320fc9b44c74897a2aa77a24e88a2a8
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spelling	oai:doaj.org-article:c320fc9b44c74897a2aa77a24e88a2a82021-12-05T14:11:03ZInvestigation on the relationship between CT numbers and marble failure under different confining pressures1605-812710.1515/rams-2021-0070https://doaj.org/article/c320fc9b44c74897a2aa77a24e88a2a82021-11-01T00:00:00Zhttps://doi.org/10.1515/rams-2021-0070https://doaj.org/toc/1605-8127Computed tomography (CT) scanning technology is helpful in investigating rock materials as it can demonstrate the micro structure of rock clearly. Conventional triaxial compression tests and the corresponding graded triaxial loading tests were carried out to investigate the complex failure mechanism of the marble at the Jinping Hydropower Station. After that CT-scanning tests were done on the loaded marble specimens. The test results show that (1) the CT numbers of the specimens have a certain statistical regularity, that is, the CT numbers of the specimens under different confining pressures satisfy the Weibull distribution, as the confining pressure increases, the mean values rise while variances decrease; (2) in the two groups of tests, the average CT numbers corresponding to the conventional triaxial tests are higher than those corresponding to the graded loading tests, but the CT number variances are lower than those of the graded loading tests; and (3) according to meso-damage mechanics, the damage variables of the rock specimens were established based on the definition of CT numbers. The calculation results show that the damage variables decrease with the increase in confining pressure, the damage variables of the rock specimens in the graded loading tests are higher than those in the conventional triaxial test, and the differences between the two loading tests have grown with the increase in confining pressure.Yan-Shuang YangKai-Yue LiHui ZhouHao-Yuan TianWei ChengZhan-Rong ZhangMusonda KaundaDe Gruyterarticlect scanconfining pressurestatistical distributiondamage variableTechnologyTChemical technologyTP1-1185ENReviews on Advanced Materials Science, Vol 60, Iss 1, Pp 846-852 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ct scan confining pressure statistical distribution damage variable Technology T Chemical technology TP1-1185
spellingShingle	ct scan confining pressure statistical distribution damage variable Technology T Chemical technology TP1-1185 Yan-Shuang Yang Kai-Yue Li Hui Zhou Hao-Yuan Tian Wei Cheng Zhan-Rong Zhang Musonda Kaunda Investigation on the relationship between CT numbers and marble failure under different confining pressures
description	Computed tomography (CT) scanning technology is helpful in investigating rock materials as it can demonstrate the micro structure of rock clearly. Conventional triaxial compression tests and the corresponding graded triaxial loading tests were carried out to investigate the complex failure mechanism of the marble at the Jinping Hydropower Station. After that CT-scanning tests were done on the loaded marble specimens. The test results show that (1) the CT numbers of the specimens have a certain statistical regularity, that is, the CT numbers of the specimens under different confining pressures satisfy the Weibull distribution, as the confining pressure increases, the mean values rise while variances decrease; (2) in the two groups of tests, the average CT numbers corresponding to the conventional triaxial tests are higher than those corresponding to the graded loading tests, but the CT number variances are lower than those of the graded loading tests; and (3) according to meso-damage mechanics, the damage variables of the rock specimens were established based on the definition of CT numbers. The calculation results show that the damage variables decrease with the increase in confining pressure, the damage variables of the rock specimens in the graded loading tests are higher than those in the conventional triaxial test, and the differences between the two loading tests have grown with the increase in confining pressure.
format	article
author	Yan-Shuang Yang Kai-Yue Li Hui Zhou Hao-Yuan Tian Wei Cheng Zhan-Rong Zhang Musonda Kaunda
author_facet	Yan-Shuang Yang Kai-Yue Li Hui Zhou Hao-Yuan Tian Wei Cheng Zhan-Rong Zhang Musonda Kaunda
author_sort	Yan-Shuang Yang
title	Investigation on the relationship between CT numbers and marble failure under different confining pressures
title_short	Investigation on the relationship between CT numbers and marble failure under different confining pressures
title_full	Investigation on the relationship between CT numbers and marble failure under different confining pressures
title_fullStr	Investigation on the relationship between CT numbers and marble failure under different confining pressures
title_full_unstemmed	Investigation on the relationship between CT numbers and marble failure under different confining pressures
title_sort	investigation on the relationship between ct numbers and marble failure under different confining pressures
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/c320fc9b44c74897a2aa77a24e88a2a8
work_keys_str_mv	AT yanshuangyang investigationontherelationshipbetweenctnumbersandmarblefailureunderdifferentconfiningpressures AT kaiyueli investigationontherelationshipbetweenctnumbersandmarblefailureunderdifferentconfiningpressures AT huizhou investigationontherelationshipbetweenctnumbersandmarblefailureunderdifferentconfiningpressures AT haoyuantian investigationontherelationshipbetweenctnumbersandmarblefailureunderdifferentconfiningpressures AT weicheng investigationontherelationshipbetweenctnumbersandmarblefailureunderdifferentconfiningpressures AT zhanrongzhang investigationontherelationshipbetweenctnumbersandmarblefailureunderdifferentconfiningpressures AT musondakaunda investigationontherelationshipbetweenctnumbersandmarblefailureunderdifferentconfiningpressures
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Investigation on the relationship between CT numbers and marble failure under different confining pressures

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