Experimental and Numerical Investigation of Failure Characteristics and Mechanism of Granites with Different Joint Angles

The uniaxial compression tests were conducted on granite samples with different joint dip angles to more favorably explore the influences of the nonconsecutive joint on mechanical properties and deformation characteristics of the rock mass. The stress-strain curves, deformation and strength characte...

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Autores principales:	Zhenhua Wang, Jun Fang, Gang Wang, Yifan Jiang, Dongwei Li
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/011b85c45753496894285e2710b1ddd8
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spelling	oai:doaj.org-article:011b85c45753496894285e2710b1ddd82021-11-29T00:56:59ZExperimental and Numerical Investigation of Failure Characteristics and Mechanism of Granites with Different Joint Angles1875-920310.1155/2021/6890833https://doaj.org/article/011b85c45753496894285e2710b1ddd82021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/6890833https://doaj.org/toc/1875-9203The uniaxial compression tests were conducted on granite samples with different joint dip angles to more favorably explore the influences of the nonconsecutive joint on mechanical properties and deformation characteristics of the rock mass. The stress-strain curves, deformation and strength characteristics, and energy evolution process of the samples were analyzed. Numerical simulation using particle flow code (PFC) is employed to study the crack propagation process. The mode of jointed and fractured rock was investigated. The research results showed a significant reduction in both the peak strength and elastic modulus of jointed samples compared with intact ones: the peak strength and elastic modulus drop to the minimum at the joint dip angle of about 45°, especially for the peak strength, which takes up about 55% of the intact samples. The fractured samples’ total energy, elastic strain energy, and dissipated energy during the uniaxial compression drop significantly relative to intact samples. The proportion of the fracture modes varies with different joint dip angles, in which the ratio of shear cracks grows at first and then declines, with the highest balance at the dip angle of 45°. The damage stress’s sensitivity to the dip angle change is greater than that of the peak stress, with reduction amplitude more extensive than the latter.Zhenhua WangJun FangGang WangYifan JiangDongwei LiHindawi LimitedarticlePhysicsQC1-999ENShock and Vibration, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Zhenhua Wang Jun Fang Gang Wang Yifan Jiang Dongwei Li Experimental and Numerical Investigation of Failure Characteristics and Mechanism of Granites with Different Joint Angles
description	The uniaxial compression tests were conducted on granite samples with different joint dip angles to more favorably explore the influences of the nonconsecutive joint on mechanical properties and deformation characteristics of the rock mass. The stress-strain curves, deformation and strength characteristics, and energy evolution process of the samples were analyzed. Numerical simulation using particle flow code (PFC) is employed to study the crack propagation process. The mode of jointed and fractured rock was investigated. The research results showed a significant reduction in both the peak strength and elastic modulus of jointed samples compared with intact ones: the peak strength and elastic modulus drop to the minimum at the joint dip angle of about 45°, especially for the peak strength, which takes up about 55% of the intact samples. The fractured samples’ total energy, elastic strain energy, and dissipated energy during the uniaxial compression drop significantly relative to intact samples. The proportion of the fracture modes varies with different joint dip angles, in which the ratio of shear cracks grows at first and then declines, with the highest balance at the dip angle of 45°. The damage stress’s sensitivity to the dip angle change is greater than that of the peak stress, with reduction amplitude more extensive than the latter.
format	article
author	Zhenhua Wang Jun Fang Gang Wang Yifan Jiang Dongwei Li
author_facet	Zhenhua Wang Jun Fang Gang Wang Yifan Jiang Dongwei Li
author_sort	Zhenhua Wang
title	Experimental and Numerical Investigation of Failure Characteristics and Mechanism of Granites with Different Joint Angles
title_short	Experimental and Numerical Investigation of Failure Characteristics and Mechanism of Granites with Different Joint Angles
title_full	Experimental and Numerical Investigation of Failure Characteristics and Mechanism of Granites with Different Joint Angles
title_fullStr	Experimental and Numerical Investigation of Failure Characteristics and Mechanism of Granites with Different Joint Angles
title_full_unstemmed	Experimental and Numerical Investigation of Failure Characteristics and Mechanism of Granites with Different Joint Angles
title_sort	experimental and numerical investigation of failure characteristics and mechanism of granites with different joint angles
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/011b85c45753496894285e2710b1ddd8
work_keys_str_mv	AT zhenhuawang experimentalandnumericalinvestigationoffailurecharacteristicsandmechanismofgraniteswithdifferentjointangles AT junfang experimentalandnumericalinvestigationoffailurecharacteristicsandmechanismofgraniteswithdifferentjointangles AT gangwang experimentalandnumericalinvestigationoffailurecharacteristicsandmechanismofgraniteswithdifferentjointangles AT yifanjiang experimentalandnumericalinvestigationoffailurecharacteristicsandmechanismofgraniteswithdifferentjointangles AT dongweili experimentalandnumericalinvestigationoffailurecharacteristicsandmechanismofgraniteswithdifferentjointangles
_version_	1718407626688036864

Experimental and Numerical Investigation of Failure Characteristics and Mechanism of Granites with Different Joint Angles

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