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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Exploration of the Mesoscopic Failure Process of Granite Based on a PDE Method
https://orcid.org/http://orcid.org/0000-0003-2339-1908
https://orcid.org/http://orcid.org/0000-0001-7331-2345
The meso-structure of rock influences its macro-mechanical properties. In traditional digital image processing, the filter operator causes fuzzy edges. There is a lack of image processing methods which can conveniently, and quickly, obtain a continuous, smooth, and closed curve with a clear boundary. In this study, a Chan-Vese (C-V) module of the partial differential equation (PDE) method was used to realise the three-phase segmentation of granite. Then, the AUTOLISP language was adopted to allow automatic line connection of the discrete boundary points in the digital image. The meso-scale model was implemented into numerical calculations to explore the evolution of a meso-crack. The crack originated from the stress concentration resulting from the uncoordinated deformation of the non-homogeneous materials under a Brazilian splitting test. The crack first appeared inside the materials with weak mechanical properties along the main diagonal of specimens under uniaxial compression. A stress concentration first appeared on the quartz-mica contact surface under triaxial compression. The tensile stress enveloped the weaker mica and feldspar as the load increased.
Exploration of the Mesoscopic Failure Process of Granite Based on a PDE Method
https://orcid.org/http://orcid.org/0000-0003-2339-1908
https://orcid.org/http://orcid.org/0000-0001-7331-2345
The meso-structure of rock influences its macro-mechanical properties. In traditional digital image processing, the filter operator causes fuzzy edges. There is a lack of image processing methods which can conveniently, and quickly, obtain a continuous, smooth, and closed curve with a clear boundary. In this study, a Chan-Vese (C-V) module of the partial differential equation (PDE) method was used to realise the three-phase segmentation of granite. Then, the AUTOLISP language was adopted to allow automatic line connection of the discrete boundary points in the digital image. The meso-scale model was implemented into numerical calculations to explore the evolution of a meso-crack. The crack originated from the stress concentration resulting from the uncoordinated deformation of the non-homogeneous materials under a Brazilian splitting test. The crack first appeared inside the materials with weak mechanical properties along the main diagonal of specimens under uniaxial compression. A stress concentration first appeared on the quartz-mica contact surface under triaxial compression. The tensile stress enveloped the weaker mica and feldspar as the load increased.
Exploration of the Mesoscopic Failure Process of Granite Based on a PDE Method
https://orcid.org/http://orcid.org/0000-0003-2339-1908
https://orcid.org/http://orcid.org/0000-0001-7331-2345
The meso-structure of rock influences its macro-mechanical properties. In traditional digital image processing, the filter operator causes fuzzy edges. There is a lack of image processing methods which can conveniently, and quickly, obtain a continuous, smooth, and closed curve with a clear boundary. In this study, a Chan-Vese (C-V) module of the partial differential equation (PDE) method was used to realise the three-phase segmentation of granite. Then, the AUTOLISP language was adopted to allow automatic line connection of the discrete boundary points in the digital image. The meso-scale model was implemented into numerical calculations to explore the evolution of a meso-crack. The crack originated from the stress concentration resulting from the uncoordinated deformation of the non-homogeneous materials under a Brazilian splitting test. The crack first appeared inside the materials with weak mechanical properties along the main diagonal of specimens under uniaxial compression. A stress concentration first appeared on the quartz-mica contact surface under triaxial compression. The tensile stress enveloped the weaker mica and feldspar as the load increased.
Exploration of the Mesoscopic Failure Process of Granite Based on a PDE Method
KSCE J Civ Eng
Zhang, Liming (Autor:in) / Cong, Yu (Autor:in) / Ma, Shaoqiong (Autor:in) / Feng, Baocheng (Autor:in)
KSCE Journal of Civil Engineering ; 24 ; 2257-2267
01.08.2020
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Numerical investigation on the failure process of Hong Kong granite
| British Library Conference Proceedings | 2001