Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Characterization of orthotropic nature of cleavage planes in granitic rock
Abstract Granite naturally exhibits anisotropic elasticity because of the alignment of minerals formed in the three orthogonal cleavage planes known as rift, grain, and hardway planes. Of critical importance for studying cleavage planes is to understand how they affect the spatial distribution of anisotropy. Here we use multiple approaches which measure tensile strength, ultrasonic wave velocity, and three-dimensional (3D) X-ray computed tomography (CT) imaging to elucidate the existence of cleavage. Our results show that essential features of cleavage-induced anisotropy, e.g., orientation of the failure mode and directional dependency of elastic constants, can be identified with high precision. Furthermore, the results highlight that the proposed CT image technique can achieve 3D spatial mapping of anisotropy, providing a causal link between the cleavage planes and the spatial distribution of anisotropy in granite. This comprehensive understanding through the described techniques could have practical uses in predicting the fracture path and potential flow pathways for petroleum, groundwater, natural gas, etc.
Highlights Cleavage-induced strong anisotropy in granite and its influence on tensile strength and ultrasonic wave velocity Pronounced manifestation of cleavage planes estimated by 3D x-ray image analysis. Integrated understanding of cleavage planes in granite by multiple methods.
Characterization of orthotropic nature of cleavage planes in granitic rock
Abstract Granite naturally exhibits anisotropic elasticity because of the alignment of minerals formed in the three orthogonal cleavage planes known as rift, grain, and hardway planes. Of critical importance for studying cleavage planes is to understand how they affect the spatial distribution of anisotropy. Here we use multiple approaches which measure tensile strength, ultrasonic wave velocity, and three-dimensional (3D) X-ray computed tomography (CT) imaging to elucidate the existence of cleavage. Our results show that essential features of cleavage-induced anisotropy, e.g., orientation of the failure mode and directional dependency of elastic constants, can be identified with high precision. Furthermore, the results highlight that the proposed CT image technique can achieve 3D spatial mapping of anisotropy, providing a causal link between the cleavage planes and the spatial distribution of anisotropy in granite. This comprehensive understanding through the described techniques could have practical uses in predicting the fracture path and potential flow pathways for petroleum, groundwater, natural gas, etc.
Highlights Cleavage-induced strong anisotropy in granite and its influence on tensile strength and ultrasonic wave velocity Pronounced manifestation of cleavage planes estimated by 3D x-ray image analysis. Integrated understanding of cleavage planes in granite by multiple methods.
Characterization of orthotropic nature of cleavage planes in granitic rock
Kim, Gun (Autor:in) / Jang, Jaewon (Autor:in) / Kim, Kwang Yeom (Autor:in) / Yun, Tae Sup (Autor:in)
Engineering Geology ; 265
21.11.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Granitic rock , Anisotropy , Cleavage , Wave velocity , X-ray image , CT , Computed tomography , 3D , three-dimensional , 2D , two-dimensional
Relations between strength and nature of rock as exemplified in Tessin granitic gneiss
| Engineering Index Backfile | 1949
The crack problem of two bonded half orthotropic planes materials
| British Library Online Contents | 1995
Stability Assessment and Stabilisation Measures for Granitic Rock Slope
| British Library Conference Proceedings | 2002
Hydrofracturing stress measurement in granitic rock with scarce joints
| British Library Conference Proceedings | 1997
Finite Element Analysis of Twin Tunnels in Granitic Rock
| Springer Verlag | 2024